Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
What are the two principles in Hungarian method?
Front page We need to continue or customization and documentation of our system. Currently our system boots into runlevel 5 and we need it to boot into runlevel 3. For future r
What is a Process Control Block? Every process in the operating system is represented by a process control block as well called a task control block. It contains several pieces
what are the design issues of network OS
The performance of a file system depends upon the cache hit rate (fraction of blocks found in the cache). If it takes 1 msec to satisfy a request from the cache, but 40 msec to sat
What is the purpose of the command interpreter? Why is it usually separate from the kernel? It reads commands from the user or from a file of commands and executes them, usuall
Remote IT Support Engineer Windows Systems Administrator Project Description: Need Windows base IT Support Engineer / Systems Network Administrator - perfectly MCSE qualified
NEXT FIT ALGORITHM Here scanning starts from the first fit position and then it finds the next position which is large sufficient to hold the process. Thus the name next fit.
Q. Explain about Functions of Operating System? Functions of Operating System Operating system performs 3 functions as follows: 1. Convenience: Operating System mak
What is the Translation Lookaside Buffer (TLB) In a cached system, the base addresses of the last few referenced pages is maintained in registers known as the TLB that aids in
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd