Networking protocols, Operating System

Assignment Help:

Modern networks are not implemented as a single piece of software; that would render the task of dealing with multiple technologies and manufacturers virtually impossible. The solution for this problem is to structure computer networks as stacks of different protocols. A protocol can be seen as a "language" in which two entities (computers, routers, etc) communicate with each other. Typically, one protocol is created to solve a predetermined set of networking tasks, such as being able to send ?xed-length messages, or guaranteeing message order, etc. The capability of a protocol to solve these tasks makes it a "black box" that can be used by protocols on the level immediately above; similarly, the protocol itself can make use of the capabilities provided by the protocol on the level immediately below. Thus, all modern networks are implemented as a stack of abstractions, all of which are implemented as composable protocols; we say that the layer N provides services to layer N+1 and uses the services from layer N-1.

As an example, consider the stack presented in Figure in this example we show how the HTTP protocol (or, similarly, SMTP and ssh) can be implemented using the services provided by the TCP protocol. Also, the TCP protocol is implemented using the services of the IP layer, which itself uses the services provided by the Ethernet layer. Notice that one advantage of this type of architecture is that if we were to build a new functionality (say, wireless connections, instead of Ethernet), it would suf?ce for us to implement this new layer and to guarantee that it provides, to the IP level, the same services that were once provided by the Ethernet level. Nowhere would we need to care about the details of TCP, HTTP, or, for that matter, any of the top-level protocols.


Related Discussions:- Networking protocols

Explain the concept of process, Q. Explain the Concept of Process? A pr...

Q. Explain the Concept of Process? A process is sequential program in execution. A process states the basic unit of computation for the computer. Components of process are:

Transfer time, A hard-disk drive reads “120 GB HDD 7200 rpm 3 GB/sec transf...

A hard-disk drive reads “120 GB HDD 7200 rpm 3 GB/sec transfer rate”. If the drive has a sector size of 512 bytes, what is the average rotational latency and transfer time to read

Dynamically loadable kernel modules, Q. Dynamically loadable kernel module...

Q. Dynamically loadable kernel modules give elasticity when drivers are added to a system however do they have disadvantages too? Under what situations would a kernel be compiled

What is a latency time, What is a Latency Time Latency Time is the time...

What is a Latency Time Latency Time is the time required through a sector to reach below read/write head.

Explain deadlock avoidance, Deadlock Avoidance It's a method to evade ...

Deadlock Avoidance It's a method to evade deadlock by careful resource scheduling. This approach to the deadlock problem foresees deadlock before it actually occurs. This a

What is the use of FIFOs in client-server applications, What is the use of ...

What is the use of FIFOs in client-server applications

What are the deadlock prevention methodologies?, What are the deadlock p r...

What are the deadlock p revention methodologies? a.       Necessitate that processes request all resources before starting - if cannot be granted don't run. b.      Process

What is the sequence in which resources may be utilized, What is the sequen...

What is the sequence in which resources may be utilized? Under normal mode of operation, a process may utilize a resource in the following sequence: Request: If the requ

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