discuss different protocols pertaining to communications and networking
Post on 07-Jul-2018
219 Views
Preview:
TRANSCRIPT
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
1/20
Communication Network
Protocols
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
2/20
Agenda
• OSI Protocols
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
3/20
OSI Protocol Suite and
TCP/IP
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
4/20
TCP Implementation of OSI
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
5/20
Application
• The application layer is the OSI layer closest to the end user, which
means that oth the OSI application layer and the user interact
directly with the software application!
• This layer interacts with software applications that implement a
communicating component! Such application programs fall outsidethe scope of the OSI model! Application layer functions typically
include identifying communication partners, determining resource
a"ailaility, and synchroni#ing communication! !
• Some e$amples of application layer implementations include Telnet,
%ile Transfer Protocol &%TP', and Simple (ail Transfer Protocol&S(TP', )NS, *e+ttp!
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
6/20
Application &cont!'
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
7/20
Presentation
• The presentation layer pro"ides a "ariety of coding and con"ersion
functions that are applied to application layer data! These functions
ensure that information sent from the application layer of one
system would e readale y the application layer of another
system! Some e$amples of presentation layer coding and
con"ersion schemes include common data representation formats,
con"ersion of character representation formats, common data
compression schemes, and common data encryption schemes!
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
8/20
Presentation -ayer &cont!'
• A%P, AppleShare %ile Protocol
• .I%, .I%
• ICA Citri$ Systems Core Protocol/01/
• 2P3., 2oint Photographic 3$perts .roup
• -PP, -ightweight Presentation Protocol
• NCP, Net*are Core Protocol
• N)4, Network )ata 4epresentation
• PN., Portale Network .raphics
• TI%%, Tagged Image %ile %ormat • 5)4, e5ternal )ata 4epresentation
• 5!67 PA), Packet Assemler+)isassemler Protocol
• 4etrie"ed from 8http9++en!wikipedia!org+wiki+Presentation:layer 8
http://en.wikipedia.org/wiki/AppleShare_File_Protocolhttp://en.wikipedia.org/wiki/Graphics_Interchange_Formathttp://www.citrix.com/http://en.wikipedia.org/wiki/JPEGhttp://en.wikipedia.org/wiki/NetWare_Core_Protocolhttp://en.wikipedia.org/wiki/Network_Data_Representationhttp://en.wikipedia.org/wiki/PNGhttp://en.wikipedia.org/wiki/TIFFhttp://en.wikipedia.org/wiki/External_Data_Representationhttp://en.wikipedia.org/wiki/Presentation_layerhttp://en.wikipedia.org/wiki/Presentation_layerhttp://en.wikipedia.org/wiki/External_Data_Representationhttp://en.wikipedia.org/wiki/TIFFhttp://en.wikipedia.org/wiki/PNGhttp://en.wikipedia.org/wiki/Network_Data_Representationhttp://en.wikipedia.org/wiki/NetWare_Core_Protocolhttp://en.wikipedia.org/wiki/JPEGhttp://www.citrix.com/http://en.wikipedia.org/wiki/Graphics_Interchange_Formathttp://en.wikipedia.org/wiki/AppleShare_File_Protocol
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
9/20
Session
• The session layer implementation of the OSI protocol suite consists
of a session protocol and a session ser"ice! The session protocol
allows session;ser"ice users &SS;users' to communicate with the
session ser"ice! An SS;user is an entity that re
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
10/20
Session &cont!'
Session ser"ice pro"ides four asic ser"ices to SS;users!
1! 3stalishes and terminates connections etween SS;users and
synchroni#es the data e$change etween them!
6! Performs "arious negotiations for the use of session layer tokens,which the SS;user must possess to egin communicating!
=! Inserts synchroni#ation points in transmitted data that allow the
session to e reco"ered in the e"ent of errors or interruptions!
?! 3nales SS;users to interrupt a session and resume it later at a
specific point!
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
11/20
Transport
• The OSI protocol suite implements two types of ser"ices at the
transport layer9 connection;oriented transport ser"ice and
connectionless transport ser"ice!
%i"e connection;oriented transport layer protocols e$ist in the OSIsuite, ranging from Transport Protocol Class > through Transport
Protocol Class ?! Connectionless transport ser"ice is supported only
y Transport Protocol Class ?!
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
12/20
Transport &cont!'
• Transport Protocol Class > &TP>', the simplest OSI transport protocol, performs segmentation and
reassemly functions! TP> re
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
13/20
Network -ayer
The network layer pro"ides the functional and procedural means of
transferring "ariale length data se
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
14/20
Network -ayer &cont!'
Virtual Networks
• used to setup, maintain
teardown BC
• used in AT(, frame;relay,5!67
• not used in todayDs
Internet
Datagram Networks
• no call setup at network
layer
• routers9 no state aoutend;to;end connections
no network;le"el concept of
EconnectionF
• packets forwarded using
destination host address
packets etween same
source;dest pair may take
different paths
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
15/20
)ata -ink
• The data link layer pro"ides reliale transit of data across a physical
network link! )ifferent data link layer specifications define different
network and protocol characteristics, including physical addressing,
network topology, error notification, se
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
16/20
)ata -ink &cont!'
“link”
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
17/20
)ata -ink &cont!'
The Logical Link Control (LLC) sulayer of the data link layer manages communications etween de"ices
o"er a single link of a network! --C is defined in the I333 G>6!6 specification and supports oth
connectionless and connection;oriented ser"ices used y higher;layer protocols! I333 G>6!6 defines a
numer of fields in data link layer frames that enale multiple higher;layer protocols to share a single
physical data link! The Media Access Control (MAC) sulayer of the data link layer manages protocol
access to the physical network medium! The I333 (AC specification defines (AC addresses, which
enale multiple de"ices to uni
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
18/20
Physical
The physical layer defines the electrical, mechanical, procedural,
and functional specifications for acti"ating, maintaining, and
deacti"ating the physical link etween communicating network
systems! Physical layer specifications define characteristics such as"oltage le"els, timing of "oltage changes, physical data rates,
ma$imum transmission distances, and physical connectors!
Physical layer implementations can e categori#ed as either -AN or
*AN specifications! %igure 1;H illustrates some common -AN and*AN physical layer implementations!
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
19/20
Physical -ayer
-
8/18/2019 Discuss Different Protocols Pertaining to Communications and Networking
20/20
OSI;)ata %low
top related