Computer Network 1.1 This is not a function of the transport layer a. End System

Question

Computer Network

1.1 This is not a function of the transport layer a. End System Process identification b. Flow control c. Error control d. Reliable Message handling e. Global addressing 1.2 This is not a function of data link layer a. Packet routing and encryption h. Error and flow control c. Medium Access control d. Physical addressing 1.3 This is not a function of the network layer a. Routing b. End System Process identification e. Forwarding packets d. Logical addressing 1.4 A web cache is a network entity that satisfies HITP requests on the behalf of an origin Web server. a. True b. False

Explanation / Answer

1.1:

Transport Layer do End to End Process Identification through port numbers.

TCP protocol comes under Transport Layer and It handles error and flow control and Reliable Message Handling.

Global Addressing handles by Network Layer .

So tha answer is (D).

1.2:

Date link layer do frame formation and encrypte the packets coming from network layer bit by bit.

It also handles flow and error control for the packet coming from network layer.

It also handles the medium access control using tokenisation and use 2 protocols CSMA/CD and CSMA/CA.

It also make the frames from the packets coming from upper laye.

Thus the answer is (A).

1.3:

Network layer route the packet from source to destination using specified protocols like TCP/IP,etc.

Network Layer Forward the packet through optimal path based on the destination.

It also do logical addressing using Network Address Translation(NAT) Protocol.

It doesn't support the port numbers , which is handled by upper transport layer

Therefore the answer is (B)

1.4

Web cache stores the incoming HTML pages, raw data and save them for future use, So, whenever there is any request for the cached data, instead making another request, it entertain that through web cache and thus act as a origin web server to client.

Thsu answer is (A).

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