Please Help 1 What layers in the protocol stackboth logicall

Please Help!!!

1) What layers in the protocol stack(both logically and physically) does the HTTP protocol talk to? 2) What might a protocol frame from a Web Browser session look like as it goes out of a network port? Assume the link layer is ethernet. You do not need to describe the fields inside a particular header except to say it is a particular protocol header (ie TCP header). 3) I can change a link layer protocol and the application layer protocol does not need to know or be made aware of the change. Explain why?

Solution

Answer:

TCP/IP Layers :

The TCP/IP protocol stack models a series of protocol layers for networks and systems that allows communications between any types of devices. The model consists of fi ve separate but related layers.

The Internet protocol suite is based on these fi ve layers. TCP/IP says most about the network and transport layers, and a lot about the application layer.

TCP/IP also defi nes how to interface the network layer with the data link and physical layers, but is not directly concerned with these two layers themselves.

TCP/IP Layers:

Physical Layer:

Contains all the functions needed to carry the bit stream over a physical medium to another system.

Data Link Layer:

Organizes the bit stream into a data unit called a “frame” and delivers the frame to an adjacent system.

Network Layer:

Delivers data in the form of a packet from source to destination,across as many links as necessary, to non-adjacent systems.

Transport Layer:

Concerned with process-to-process delivery of information.

Application Layer:

Concerned with differences in internal representation, user interfaces, and anything else that the user requires.