In information technology , the TransportLayerSecurity TLS protocol provides connection security with mutual authentication, data confidentiality and integrity, key generation and distribution, and security parameters negotiation. However, missing from the protocol is a way to multiplex application data over a single TLS session. Multiplexed TransportLayerSecurity MTLS protocol is a new TLS sub protocol running over TransportLayerSecurity TLS or Datagram TransportLayerSecurity DTLS . The MTLS design provides application multiplexing over a single TLS or DTLS session. Therefore, instead of associating a TLS connection with each application, MTLS allows several applications to protect their exchanges over a single TLS session. MTLS is currently in draft stage http tools.ietf.org html draft badra hajjeh mtls 05 which expired in October 2009. See also OpenSSL a free and popular implementation. GnuTLS a free implementation whose licensing is compatible with the GNU General Public License GPL . External links http www.ietf.org dyn wg charter tls charter.html The IETF TLS Workgroup http tools.ietf.org html draft badra hajjeh mtls 05 MTLS Draft http crypto.stanford.edu nagendra papers dtls.pdf The Design and Implementation of Datagram TLS Category Cryptographic protocols Category Internet protocols crypto stub bg SSL de Datagram TransportLayerSecurity fi TLS fr Secure socket layer ja Secure Socket Layer pt SSL ... more details
In information technology , the Datagram TransportLayerSecurity DTLS protocol provides communications privacy for packet information technology datagram protocols. DTLS allows datagram based applications to communicate in a way that is designed to prevent eavesdropping, tampering, or message forgery. The DTLS protocol is based on the stream oriented TransportLayerSecurity TLS protocol and is intended to provide similar security guarantees. The datagram semantics of the underlying transport are preserved by the DTLS protocol the application will not suffer from the delays associated with stream protocols, but will have to deal with packet reordering, loss of datagram and data larger than a datagram packet size. DTLS is defined in RFC 6347 for use with User Datagram Protocol UDP , in RFC 5238 for use with DCCP , and in RFC 6083 for use with SCTP encapsulation. See also OpenSSL a free and popular implementation of TLS added support for DTLS with version 0.9.8. CyaSSL an open source embedded SSL TLS implementation with DTLS support. GnuTLS a free software implementation of TLS with support for DTLS since version 3.0.0. Comparison of TLS Implementations External links http www.ietf.org html.charters tls charter.html The IETF TLS Workgroup http crypto.stanford.edu nagendra papers dtls.pdf The Design and Implementation of Datagram TLS http www.eldos.com sbb desc ssl.php SSLBlackbox components for Windows and .NET software development with support for DTLS http www.cisco.com en US products ps8411 tsd products support series home.html AnyConnect popular VPN Client that uses TLS and DTLS http www.yassl.com yaSSL.com SSL TLS implementation with support for DTLS since version 1.0.3 http libsystools.sourceforge.net libsystools a TLS DTLS open source library for Windows Linux using ... Session layer protocols de Datagram TransportLayerSecurity es Datagram TransportLayerSecurity eu Datagram TransportLayerSecurity fr Datagram TransportLayerSecurity ... more details
Wireless TransportLayerSecurity WTLS is a security protocol, part of the Wireless Application Protocol WAP stack. It sits between the Wireless transaction protocol WTP and WAP Datagram Protocol WDP layers in the WAP communications stack. Overview WTLS is derived from TransportLayerSecurity TLS . WTLS uses similar semantics adapted for a low bandwidth mobile device. The main changes are Compressed data structures Where possible packet sizes are reduced by using bit fields, discarding redundancy and truncating some cryptographic elements. New certificate format WTLS defines a compressed certificate format. This broadly follows the X.509 X.509 v3 certificate structure, but uses smaller data structures. Packet based design TLS is designed for use over a data stream. WTLS adapts that design to be more appropriate on a packet based network. A significant amount of the design is based on a requirement that it be possible to use a packet network such as Short message service SMS as a data transport. WTLS has been superseded in the WAP Wireless Application Protocol 2.0 standard by the End to end TransportLayerSecurity Specification. Security WTLS uses modern cryptography cryptographic algorithms and in common with TLS allows negotiation of cryptographic suites between client and server. Algorithms An incomplete list Key Exchange and Signature RSA algorithm RSA Elliptic curve cryptography Elliptic Curve Cryptography ECC Symmetric Encryption Data Encryption Standard DES Triple DES RC5 Message Digest MD5 SHA1 Security criticisms Encryption Decryption at the gateway in the WAP architecture ... Category Internet standards Category Transportlayer protocols de Wireless TransportLayerSecurity es Wireless TransportLayerSecurity fr Wireless TransportLayerSecurity sv Wireless TransportLayerSecurity ... the security. The use of a new certificate format is an example of this. The format defined in the WTLS ... more details
TransportLayerSecurity TLS and its predecessor, Secure Sockets Layer SSL , are cryptographic protocol ... rfc5246 title The TransportLayerSecurity TLS Protocol, Version 1.2 date August 2008 author T. Dierks ... Programming API Early research efforts toward transportlayersecurity included the Secure Network ... independently using the term Datagram TransportLayerSecurity DTLS . A prominent use of TLS is for securing ... server is added. In order to provide the server name, RFC 4366 TransportLayerSecurity TLS Extensions ... considered obsolete RFC 2246 The TLS Protocol Version 1.0 . RFC 4346 The TransportLayerSecurity ..., POP3 and ACAP services that allow the server and client to use transportlayersecurity to provide ... Cipher Suites to TransportLayerSecurity TLS . The 40 bit cipher suites defined in this memo ... 1.1 to initiate TransportLayerSecurity TLS over an existing TCP connection. This allows unsecured ... transportlayersecurity to provide private, authenticated communication over the Internet. RFC 3268 ... symmetric ciphers. RFC 3546 TransportLayerSecurity TLS Extensions , adds a mechanism for negotiating ... by RFC 4366. RFC 3749 TransportLayerSecurity Protocol Compression Methods , specifies the framework for compression methods and the DEFLATE compression method. RFC 3943 TransportLayerSecurity ... Suites to TransportLayerSecurity TLS . RFC 4162 Addition of SEED Cipher Suites to TransportLayerSecurity TLS . RFC 4217 Securing FTPS FTP with TLS . RFC 4279 Pre Shared Key Ciphersuites for Transport ... mechanism. RFC 4492 Elliptic Curve Cryptography ECC Cipher Suites for TransportLayerSecurity TLS . RFC 4507 TransportLayerSecurity TLS Session Resumption without Server Side State . RFC 4680 TLS ... Key PSK Ciphersuites with NULL Encryption for TransportLayerSecurity TLS . RFC 5054 Using the Secure ... the TLS SRP ciphersuites. RFC 5081 Using OpenPGP Keys for TransportLayerSecurity TLS Authentication , obsoleted by RFC 6091. Extensions to TLS 1.2 include RFC 5746 TransportLayerSecurity TLS Renegotiation ... more details
Wikify date March 2012 TLS OBC is an RFC proposal that increases SSL TLS security by using certificates on both ends of the TLS connection. What s special here is that the client is permitted to dynamically create a local, self signed certificate that provides additional security. A useful introduction is available here http www.browserauth.net TLS OBC for System Administrators http tools.ietf.org html draft balfanz tls obc 01 TLS OBC RFC It can also protect users from the http security.stackexchange.com a 12419 396 Related Domain Cookie Attack , http stackoverflow.com q 9636857 328397 additional info is available here Category Transportlayer protocols ... more details
OSI model IPstack In computer networking , the transportlayer or layer 4 provides end to end communication services for applications ref RFC 1122, 1.1.3. The transportlayer provides end to end communication .... The transportlayer provides convenient services such as connection oriented communication connection ... networking. The definitions of the transportlayer are slightly different in these two models. This article ... programming interface to internet hosts, as opposed to the OSI Model Layer 4 transportlayer OSI model definition of the transportlayer . The most well known transport protocol is the Transmission ... Protocol SCTP . Services There are many services that can be optionally provided by a transportlayer ... of the transportlayer in the TCP IP model , but of the session layer in the OSI model. Analysis The transportlayer is responsible for delivering data to the appropriate application process on the host ... transportlayer data packet. Together with the source and destination IP address, the port numbers constitutes .... In the OSI model, this function is supported by the session layer . Some transportlayer protocols ... data. Finally, some transportlayer protocols, for example TCP, but not UDP, provide end to end ... oriented communication is implemented at network layer or data link layer rather than the transport ... for less reliable networks. Protocols The exact definition of what qualifies as a transportlayer protocol ... of transportlayer protocols class wikitable Feature Name User Datagram Protocol UDP UDP Lite Transmission ... 8 Bytes 20 60 Bytes 12 Bytes 12 or 16 bytes Transportlayer packet entity Datagram Datagram Segment ... reflist Category Internet protocols Category Transportlayer protocols Category OSI protocols ... . Transport layers are contained in both the TCP IP model RFC 1122 , ref RFC 1122, Requirements ... underlying message formats. Same order delivery The network layer doesn t generally guarantee ... Reliability Packets may be lost during transport due to network congestion and errors. By means ... more details
notability date September 2011 primary sources date September 2011 Kernel Independent TransportLayer KITL is an interface in Microsoft WinCE designed to provide an easy way for you to support any debugging service ref http msdn2.microsoft.com en us library ms901824.aspx Kernel Independent TransportLayer Bot generated title ref . References reflist Category Windows CE Windows stub ... more details
a data securitylayer offering data integrity and data confidentiality services. DIGEST MD5 provides an example of mechanisms which can provide a data securitylayer. Application protocols that support SASL typically also support TransportLayerSecurity TLS to complement the services offered by SASL ...Simple Authentication and SecurityLayer SASL is a Software framework framework for authentication and data security in Internet communications protocol protocol s. It decouples authentication mechanisms ... authentication is implicit in the context e.g., for protocols already using IPsec or TransportLayerSecurity TLS ANONYMOUS , for unauthenticated guest access PLAIN , a simple cleartext password ... scheme based upon MD5. DIGEST MD5 offers a data securitylayer. NTLM , an NT LAN Manager authentication mechanism GSSAPI , for Kerberos protocol Kerberos V5 authentication via the Generic Security Services Application Program Interface GSSAPI . GSSAPI offers a data securitylayer. MSN Chat GateKeeper ... and Presence Protocol XMPP Apache Subversion Subversion s custom svn protocol See also TransportLayerSecurity TLS External links RFC 4422 Simple Authentication and SecurityLayer SASL obsoletes RFC 2222 RFC 4505 Anonymous Simple Authentication and SecurityLayer SASL Mechanism obsoletes RFC 2245 ... Layer cs SASL de Simple Authentication and SecurityLayer es SASL fr Simple Authentication and SecurityLayer hu Simple Authentication and SecurityLayer ja Simple Authentication and SecurityLayer pl Simple Authentication and SecurityLayer ru Simple Authentication and SecurityLayer sr GNU SASL ... shared with Generic Security Services Application Program Interface GSSAPI and Kerberos protocol Kerberos ... SASL library providing generic security for various applications ref cite web url http citeseerx.ist.psu.edu viewdoc download?doi 10.1.1.127.7472&rep rep1&type pdf title GENSEC Designing a security ... 4 pages 13 format PDF accessdate 2010 03 28 quote The idea of a generic security API is not new ... to implement ... more details
In computer networking , the TransportLayer Interface TLI was the networking Application Programming Interface API provided by AT&T UNIX System V Release 3 SVR3 in 1987 ref harv Goodheart 1994 p 11 ref and continued into Release 4 SVR4 . ref name Goodheart harv Goodheart 1994 p 17 ref TLI was the System V counterpart to the Berkeley Software Distribution BSD Berkeley sockets sockets programming interface, which was also provided in UNIX System V Release 4 SVR4 . ref name Goodheart TLI was later standardized as XTI , the X Open Transport Interface . TLI and Sockets It was originally expected that the Open Systems Interconnection OSI protocols would supersede TCP IP, thus TLI is designed from an OSI model OSI model oriented viewpoint, corresponding to the OSI transportlayer . Otherwise, TLI looks similar, API wise, to sockets. TLI and XTI were widely used and, up to UNIX 98, were preferred over the POSIX Sockets API. ref name Xns harv XNS 5.2 ref TLI and XTI are still supported in SVR4 derived operating systems and operating systems conforming to branded UNIX UNIX 95, UNIX 98 and UNIX 03 Single UNIX Specifications such as Solaris operating system Solaris as well as classic Mac OS , in the form of Open Transport . Under UNIX 95 XPG4 and UNIX 98 XPG5.2 , XTI was the preferred and recommended supported API for new transport protocols. ref name Xns ref harv XNS 5 ref As a result of deliberations by the Austin Group with the goal of bringing flavors of UNIX that do not provide STREAMS , such as BSD and Linux , under the Single UNIX Specification, the UNIX 03 Single UNIX Specification both declares STREAMS as optional, and declares POSIX Sockets as the preferred API for new transport protocols. See also X Open Transport Interface , formally standardized successor to TLI. X Open Portability Guide , the predecessor to POSIX Computer networking , outlining the major networking ... programming interfaces de TransportLayer Interface ja TransportLayer Interface ru ... more details
File SPF Transcom 03.jpg thumb right Member of Singapore s Public TransportSecurity Command keeping watch over train passengers. File CI Car Overhaul Shop S jeh 2.jpg thumb right Rail yard enclosed with security fencing. However, this is primarily intended to deter vandalism such as Graffiti tagging . Public transportsecurity refers to measures taken by a mass transit system to keep its passengers and employees safe, to protect the carrier s equipment, and to make sure other violations do not occur. This includes the enforcement of various Public transport Regulations rules and regulations , human ... transportsecurity has become a major issue around the world since the September 11 attacks , and especially ... transit security 0923,0,5812385.story ref while in the United Kingdom, public transport, due to its ... searches of public transport users, they are often considered security theater , because random searches ... of security theater therefore argue that even very good security around public transport is relatively useless, as it only moves the threat from transport to other targets such as movie theaters. They instead ... 9 April 2010 ref See also Armoured bus Prohibited activities on public transport Guardian Angels References Reflist 2 Public transport Category Security Category Public transport ... Transit Security Funds first Shailagh last Murray date 12 July 2005 accessdate 22 May 2010 ref ref ... 22 May 2010 title U.S. Senate rejects increase in funds for transit security ref . Grants have been given in order to improve security to mass transit systems in the United States , ref http www.empirestatenews.net ... Edinburgh first Ross last Lydall ref Security measures It has been proposed that extra security screening ... transport. However, this would also have a number of negative side effects, which could outweigh the benefits, among them ref name OLDTACTIC increased and prohibitive costs reduced public transport ... needed date February 2010 as the likelihood of terror attacks on public transport is, for the individual ... more details
Officers from the Public TransportSecurity Command surveys and assists the public on new year s day ... Public TransportSecurity Command Singapore Police Force Singapore in 2005 Mass Rapid Transit ... more details
Layer may refer to wiktionary layer layers A layer of archaeological deposits in an Excavation archaeology Excavation A layer hen , a hen raised to produce eggs Stratum , a layer of rock or soil with internally consistent characteristics Thermocline , a layer within a body of water where the temperature changes rapidly with depth Layering , a technique for plant propagation Layered hair , a popular hair styling technique Layering clothing , the wearing of multiple layers of clothing for practical or fashion purposes Layering may also refer to the money laundering crimes, that usually occur in 3 stages placement when the dirty money is separated from the former criminal activity , layering the act of giving an appearance of legal to the values and integration when the money is formally incorporated to the economic system tocright Places Layer de la Haye is a village in Essex, England Fiction Mega Man X8 Maverick Hunters Layer , a female Maverick Hunter in the Mega Man X series Science Layer electronics , a single thickness of some material covering a surface F region Appleton Layer , or F Layer telecommunications Computing and technology Abstraction layer , a way of hiding the implementation details of a particular set of functionality OSI model layers Internet protocol suite layers 2D computer graphics Layers , layers in 2D computer graphics Layers digital image editing , used in digital image editing to separate different elements of an image map layer a set of graphical information, especially in geographic information system s layer object oriented design , a group of classes that have the same set of link time module dependencies to other modules DVD layer, such as in DVD Dual layer recording Layer HTML tag a deprecated < iframe> like tag, unique to Netscape 4 browsers A layer of objects in CAD standards CAD disambiguation de Layer es Capa desambiguaci n eo Tavolo fr Couche ko he ja ru sk Vrstva uk ... more details
Infobox Government agency agency name Canadian Air TransportSecurity Authority logo CATSA Logo.jpg logo width logo caption seal caption formed April 1, 2002 jurisdiction Government of Canada Federal government of Canada headquarters Ottawa , Ontario employees 390 2008 minister1 name Denis Lebel minister1 pfo Minister of Transport Canada Minister of Transport, Infrastructure and Communities chief1 name Angus Watt chief1 position President and CEO chief2 name D. Ian Glen chief2 position Chairman of the Board of Directors regulatory agency Transport Canada website http www.catsa.gc.ca CATSA footnotes The Canadian Air TransportSecurity Authority CATSA lang fr Administration canadienne de la s ret du transport a rien , or ACSTA is a Canadian Crown corporation responsible for the airport securitysecurity screening at the 89 designated airports in Canada. CATSA reports to the Government of Canada through the Minister of Transport Canada Minister of Transport , who is Responsible government responsible to the Parliament of Canada . CATSA was officially formed April 1, 2002, following the September 11, 2001 attacks September 11, 2001, terrorist attacks in the United States. After September 11, 2001, the Government of Canada took responsibility for airport screening which, until then, was the responsibility of the airlines. CATSA shares responsibility for civil aviation security with several federal government departments and agencies, air carriers and airport operators. Transport Canada is Canada s designated national civil aviation security regulator, under the standards established ... security companies. Mandate br CATSA conducts screening services in the following four areas ... Security Administration References Empty section date July 2010 External links http www.catsa.gc.ca CATSA Homepage Category Canadian federal Crown corporations Category Aviation security Category Aviation in Canada Canada airport stub fr Administration canadienne de la s ret du transport a rien ... more details
An S layer surface layer is a part of the cell envelope commonly found in bacteria , as well as among archaea . ref http www.sciencedirect.com science? ob ArticleURL& udi B6T9N 44M1F9J 4& user 10& origUdi B7CTD 4SH7GMN 7& fmt high& coverDate 01 2F31 2F2002& rdoc 1& orig article& acct C000050221& version 1& urlVersion 0& userid 10&md5 cddfffd5c87e8cc6c0c119e71873cd77 S layers on cell walls of cyanobacteria Micron Volume 33, Issue 3, January 2002, Pages 257 277 doi 10.1016 S0968 4328 01 00031 2 ref It consists of a monomolecular layer composed of identical proteins or glycoproteins . This two dimensional structure is built via self assembly and encloses the whole cell surface. Thus, the S layer protein can represent up to 10 15 of the whole protein content of a cell ref name ref1 cite journal author Messner P, Sleytr U title Crystalline bacterial cell surface layers journal Adv. Microb. Physiol ... name ref2 cite journal author Pum D, Messner P, Sleytr U title Role of the S layer in morphogenesis ... S layer proteins are poorly conserved or not conserved at all, and can differ markedly even between ..., the S layer is composed of one P1 , two P2 , three P3 , four P4 , or six P6 identical protein ... contain surface layer homology SLH domains, the binding occurs to the peptidoglycan and to a secondary ... electrostatic interactions between the positively charged N terminus of the S layer protein and a negatively charged secondary cell wall polymer. In Gram negative archaea , S layer proteins possess a hydrophobic ... , the S layer proteins bind to pseudomurein or to methanochondroitin. Biological functions of the S layer For many bacteria, the S layer represents the outermost interaction zone with their respective environment. Its functions are very diverse and vary from species to species. In Archaea the S layer ... and the cytoplasmic membranes References reflist DEFAULTSORT S Layer Category Cell anatomy Category Membrane biology cs S vrstva de S Layer es Capa S fr Couche S it S Layer ja S tr ... more details
Cleanup date January 2008 Refimprove date November 2008 Layer by Layer LbL deposition is a thin film fabrication technique. The films are formed by depositing alternating layers of oppositely charged materials with wash steps in between. A simple representation can be made by defining two oppositely charged polyions as and , and defining the wash step as W. To make an LbL film with 5 bilayers one would deposit W W W W W W W W W W W, which would lead to a film with 5 bilayers, specifically . The bilayers and wash steps can be performed in many different ways including dip coating , spin coating , spray coating and flow based techniques. Characterisation of LbL film deposition is typically done by optical techniques such as dual polarisation interferometry or ellipsometry or mechanical techniques such as QCM or QCMD. LbL offers several advantages over other thin film deposition methods. LbL is extremely simple and cheap. There are a wide variety of materials that can be deposited by LbL including polyions, metals, ceramics, nanoparticles, and biological molecules. Another important quality of LbL is the high degree of control over thickness, which arises due to the linear growth of the films with the number of bilayers. By the fact that each bilayer can be as thin as 1 nm, this method offers easy control over the thickness with 1 nm resolution. LbL has found applications in corrosion control, biomedical applications, and many more. Citation needed date January 2009 See also Atomic layer deposition External links http www.azonano.com news.asp?newsID 2524 Literatur Autor G. Decher Titel Fuzzy Nanoassemblies Toward Layered Polymeric Multicomposites Sammelwerk Science Band 277 Nummer 29 Jahr 1997 Seiten 1232 1237 DOI 10.1126 science.277.5330.1232 Category Thin films de Layer by layer ... more details
the packet to this host by passing it to the appropriate link layer implementation for incoming packets, capture packets and pass the packet payload up to the appropriate transportlayer protocol ... Control Protocol TCP in the transportlayer . Integrity of packets is guaranteed only ...The internet layer or IP layer is a group of internetworking methods in the Internet protocol suite , commonly ..., and specifications that are used to transport datagrams packets from the originating host ... address which is defined for this purpose by the Internet Protocol IP . The internet layer derives its ... gateways . Internet layer protocols use IP based packets. The internet layer does not include the protocols ... belong to the link layer . A particularly crucial aspect in the internet layer is the robustness principle ... host can deny Internet service to many other users. IPstack Purpose The internet layer has three basic ... layer is not responsible for reliable transmission. It provides only an unreliable service, and best ... in the internet layer are the Internet protocol IP . It is implemented in two versions, IPv4 and IPv6 ... is used by IPv4 hosts and adjacent multicast routers to establish multicast group memberships. Security IPsec Internet Protocol Security IPsec is a suite of protocols for securing Internet Protocol IP ... model The internet layer of the TCP IP model is often compared directly with the network layerlayer ... in these layers are different between the models. OSI s network layer is a catch all layer for all protocols that facilitate network functionality. The internet layer, on the other hand, is specifically ... network layer is often Where date July 2011 described to include protocols such as the Address Resolution Protocol ARP which was placed in link layer by the original TCP IP architects RFC ... standards documents the internet layer is still sometimes improperly called network layer ... Segment Size and Related Topics, J. Postel, November 1983 RFC 1108 Internet Protocol Security Options ... more details
Fools Day RFC published in 1998. Other uses Linux Gazette carries a regular column called Layer 8 Linux Security ref http www.linuxgazette.net 164 kachold.html Layer 8 Linux Security ref . See also Real ...Layer 8 is humorous Internet jargon used to refer to a nonexistent user or political layer on top of the OSI model of computer networking. ref Citation last Gregg first Michael title OSI Securing the Stack, Layer 8 Social engineering and security policy journal TechTarget date 2007 05 01 year 2007 url ... it cmptplans layer8 NCSU Layer 8 Initiative ref The OSI model is a 7 layer abstract model that describes ... other, allowing for abstraction of specific functions in each one. The top 7th layer is the Application Layer describing methods and protocols of software applications. It is then held that the user is the 8th layer. According to Bruce Schneier and RSA Layer 8 The individual person. Layer 9 The organisation. Layer 10 Government or legal compliance http blogs.rsa.com curry engineering security solutions at layer 8 and above Since the OSI layer numbers are commonly used to discuss networking topics, a troubleshooter may describe an issue caused by a user to be a layer 8 issue, similar to the PEBKAC ... 180 News article on the eighth layer ref Political economic theory ref Citation last Mosco first Vincent ..., Inc year 1996 isbn 0803985606 . ref holds that the 8th layer is important to understanding the OSI ... all shape the technologies comprising layers 1 7 of the OSI Model. An 8th layer has also been referenced ... shows Layer 8 as the financial layer, and Layer 9 as the political layer. ref https www.isc.org store logoware clothing isc 9 layer osi model cotton t shirt ISC 9 layer t shirt ref Similar pseudo layers in the TCP IP model In the TCP IP model , the 4 layer model of the Internet , the 5th layer is analogously sometimes described as the political layer and the 6th as the religious layer . This appears ... it Layer 8 ... more details
. ref The lower layers may also be named control layer and transportlayer the transportlayer is also referred to as the access layer in some architectures . Citation needed date February 2009 The concept of service layer is used in contexts such as Intelligent network s IN , Wireless Application Protocol ... date April 2009 In intelligent network s IN and cellular networks, service layer is a conceptual layer within a network service provider architecture. It aims at providing middleware that serves third party value added service s and applications at a higher application layer . The service layer ... open and secure Application Programming Interface s APIs by application layer servers owned by third party content provider s. The service layer also provides an interface to core networks at a lower resource layer. ref http books.google.com books?id j2 6yEHS0jwC&pg PA16&dq 22service layer 22 telecommunications&lr ... Service oriented architecture , the concept of service layer has a different meaning. Service layer in IMS The service layer of an IP Multimedia Subsystem IMS architecture provides multimedia services to the overall IMS network. This layer contains network elements which connect to the Serving ... Protocol SIP signalling protocol. Elements of the IMS service layer The network elements contained within the service layer are generically referred to as service platforms however the 3GPP ... such as INAP and Customised Applications for Mobile networks Enhanced Logic CAMEL . Service layer in SOA In Service oriented architecture SOA , the service layer is the third layer in a five abstraction layer model. The model consists of Object layer, Component layer, Service layer, process layer and Enterprise layer. ref http books.google.com books?id NISyExeJ5mAC&pg PA88&dq 22service layer 22&lr .... Published by FT Press, 2005. ISBN 0131870025, 9780131870024 ref The service layer can be considered ... Category Application layer protocols Category Service oriented business computing Category Middleware ... more details
OSIModel The presentation layer is layer 6 of the seven layer OSI model of computer network ing and serves ... us library cc959885.aspx Microsoft TechNet ref It is sometimes called the syntax layer. ref cite book ... encyclopedia v onepage&q&f false ref Description The presentation layer is responsible for the delivery and formatting of information to the application layer for further processing or display. ref ... layer of concern regarding syntactical differences in data representation within the end User computing ... text computer file to an ASCII coded file. The presentation layer is the lowest layer at which application ... of Network packet datagrams or packets between hosts. This layer deals with issues of string representation ..., e.g. code thisisastring 0 code . The idea is that the application layer should be able to point at the data to be moved, and the presentation layer will deal with the rest. what is this rest? Serialization ... TLV or XML can be thought of as the key functionality of the presentation layer. Encryption is typically done at this level too, although it can be done on the application layer application , session layer session , transportlayertransport , or network layer s, each having its own advantages and disadvantages. ref name Network Guide to Networks Decryption is also handled at the presentation layer. For example, when logging off bank account sites the presentation layer will decrypt the data as it is received ... strings, more complicated things are standardized in this layer. Two common examples are objects in object .... For example, HyperText Transfer Protocol HTTP , generally regarded as an application layer protocol, has presentation layer aspects such as the ability to identify character encoding for proper conversion, which is then done in the application layer. Within the service layering semantics of the OSI network architecture, the presentation layer responds to service requests from the application layer and issues service requests to the session layer. Services Data conversion ref name Microsoft ... more details
refimprove date October 2009 OSIModel The physical layer or layer 1 is the first and lowest layer in the seven layer OSI model of computer network ing. ref name Data and Computer Network Communications ... network 2B guide to networks&src bmrr v onepage&q&f false ref The implementation of this layer is often termed PHY . The physical layer consists of the basic networking hardware transmission technologies ... 2B guide to networks&src bmrr v onepage&q&f false ref It is a fundamental layer underlying the logical ... hardware technologies with widely varying characteristics, this is perhaps the most complex layer in the OSI architecture. The physical layer defines the means of transmitting raw bits rather than ... that is transmitted over a hardware transmission medium . The physical layer provides an electrical ..., the physical layer translates logical communications requests from the data link layer into hardware ... OSI architecture, the physical signaling sublayer is the portion of the physical layer ... interfaces with the data link layer s medium access control sublayer medium access control MAC sublayer ... of services The major functions and services performed by the physical layer are Bit by bit or symbol ... for example bitwise convolutional coding Bit interleaving and other channel coding The physical layer ... of protocols Telephone network modems V.92 Infrared Data Association IRDA physical layer USB physical layer Electronic Industries Alliance EIA RS 232 , EIA 422 , RS 423 EIA 423 , RS 449 , RS 485 Ethernet physical layer Including 10BASE T , 10BASE2 , 10BASE5 , 100BASE TX , 100BASE FX , 100BASE T , 1000BASE ... E carrier links synchronous optical network SONET SDH Optical Transport Network OTN GSM Um air interface physical layer Bluetooth physical layer International Telecommunication Union ITU Recommendations see ITU T IEEE 1394 interface TransferJet physical layer Etherloop ARINC 818 Avionics Digital Video Bus G.hn G.9960 physical layer CAN bus controller area network physical layer Hardware equipment ... more details
Protocol RTP, Real time Transport Protocol RTPS protocol RTPS , Real Time Publish Subscribe RTSP, RTSP ... Messaging and Presence Protocol References Reflist External links Commons category application layer protocols http learn networking.com tcp ip how the application layer works How The Application Layer Works refers to the Internet Protocol Suite Category OSI protocols Category Application layer protocols ... th Application layer tr Uygulama tabakas uk vi T ng ng d ng zh ... more details
, sediments et cetera transport ed to or from the interface. The term boundary layer is used in meteorology and in oceanography physical oceanography . The atmospheric surface layer is the lowest part of the atmospheric boundary layer typically the bottom 10 where the log wind profile is valid . The ocean ...Image Surface layer.jpg thumb 400px The surface layer is the layer in a fluid where the scale of turbulent ... to the surface. The surface layer is the layer of a turbulent fluid most affected by interaction with a solid ... ocean marine surface layer, at the air sea Interface chemistry interface . Mathematical Formulation A simple Mathematical model model of the surface layer can be derived by first examining the turbulent ..., MA pages 129 130 chapter Chapter 5 The Planetary Boundary Layer ref Using Reynolds Decomposition ... turbulent transport of horizontal turbulent momentum, math u w math math u 2 left overline ... frac u k ln frac z z o math . So we see that the mean flow in the surface layer has a logarithm ic relationship with depth. The Surface layer in oceanography The surface layer is studied in oceanography ... of a surface layer. Discrepancies with traditional theory The logarithmic flow profile has long ... layer in which turbulent eddies are enhanced by the action of surface waves. ref name craig ... Michael L. Banner title Modeling Wave Enhanced Turbulence in the Ocean Surface Layer journal Journal ... 1994JPO....24.2546C ref It is becoming clear that the surface layer of the ocean is only poorly ... of turbulent kinetic energy within the surface layer. ref name Agrawal Diurnal cycle After nighttime convection over the ocean, the turbulent surface layer is found to completely decay and restratify ... and restratification in the Equatorial Ocean surface layer following nighttime convection journal ... bibcode 1997JPO....27.1120C ref See also Boundary layer Mixed layer Density Salinity References this empty section displays references defined elsewhere reflist DEFAULTSORT Surface Layer Category Boundary ... more details
Double layer may refer to Double layer plasma , a structure in a plasma and consists of two parallel layers with opposite electrical charge Double layer interfacial , a structure that appears on the surface of an object when it is placed into a liquid Double layer biospecific , the surface where two different phases of matter are in contact DVD R DL or Double layer, a DVD format disambig ... more details
The term granular layer may refer to the granular layer of Tomes, seen in dentin of the teeth. When dry section of the root dentin of teeth are visualized under transmitted light, a granular layer is seen adjacent to cementum.It is believed to be caused by coalescing & looping of terminal portion of dentinal tubules. The Granular layer cerebellum of the cortex of the human cerebellum The Granular layer cerebral cortex of the cerebral cortex The Granular layer of skin disambig ... more details
Inversion layer may refer to one of the following Inversion meteorology , a layer within which an atmospheric property is inverted, i.e., its change is deviated from the normal pattern Inversion layer semiconductors , a layer in a semiconductor material where the type of the majority carriers changes to its opposite under certain conditions disambig ... more details
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