Protocol layering - computer network, Computer Networking

Assignment Help:

Protocol Layering

To design  structural  network protocols the designers organize protocol and use the network  hard ware and software to implement  the protocol  in layers. Each  protocol  belong to  one  of the layers just as  each  functions  in the metro  train  architecture in figure2.13 belonged to a layer. The services  that a  layer offers to the above  layer is  called  service  model  of a layer.

Protocol  layering has  conceptual and structural advantages. Layering provides a structured way to discuss system components. Modularity makes  it easier to update systems components. The  first  potential drawback of layering is that one layer may  duplicate lower layer functionality. For  example  many protocol stacks provide error  recovery on both  network basis and point to point procedures. A second  potential  drawback  is that functionality at one  layer may  need information  that is present  only in  another layer  this violates the goal of separation of layers.

The protocols of the  various  layers are called  the protocol stack.  The internet  protocol stack  consists  of five  layers the physical  link  network  transport and  application layers  respectively  as figure

  1. Application
  2. Transport
  3. Network
  4. Link
  5. Physical

 


Related Discussions:- Protocol layering - computer network

Application layer - fundamentals of networks, Application Layer The ap...

Application Layer The application layer provides  an  interface between  application  entities and the  users computer. This layer offers services to a variety of aspects of d

Database servers connected as a cluster to the main server, Database server...

Database servers connected as a cluster to the main server There could be three database servers connected as a cluster to the main server to provide better connectivity and se

Illustrate about sliding window protocols, Q. Illustrate about Sliding Wind...

Q. Illustrate about Sliding Window Protocols? - Sliding window - Keeps the unacknowledged outstanding frames in sender - Keeps the expected frames in receiver - Sequen

What are routers, What are routers? Routers work to connect two or more...

What are routers? Routers work to connect two or more network segments. These are the most intelligent network devices that store information in its routing table like paths, h

Explain inference, What is inference? Ans) The principle of "inference"...

What is inference? Ans) The principle of "inference" is fairly a simple one: being capable to derive new data from data that you already know. In a mathematical sense, querying

What is tracert, What is tracert? Tracert is a Windows utility program ...

What is tracert? Tracert is a Windows utility program that can used to trace the route taken by data from the router to the destination network. It also represents the number o

Ip checksum, This code properly implements the IP checksum function on a 32...

This code properly implements the IP checksum function on a 32-bit machine: unsigned short cksum(unsigned short *buf, int count) { unsigned long sum = 0; while (count--) { sum += *

Summary of special ip addresses, The table below gives a summary of special...

The table below gives a summary of special IP addresses.

Determine the maximum number of stations, (i)  Suppose N stations are conne...

(i)  Suppose N stations are connected to an extended Ethernet LAN, as shown below shown in Figure operating at the rate of 10 Mbps. Assume that the efficiency of each Ethernet is 8

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd