Q.8. What is the difference between the delivery of a frame in the data link lay

Question

Q.8. What is the difference between the delivery of a frame in the data link layer, the
delivery of a packet in the network layer and delivery segment in the transport layer?
Q.9.What is the difference between connectionless and connection-oriented services ?Which type of service is provided by IPv4?
EEC4013
EJ 6 12/23/2017
Q.10. List three transition strategies to move from IPv4 to IPv6. Explain the difference between tunneling and header translation strategies during the transition period. When is each strategy used?
Q.11. List the transport layer protocols explaining the main function for each
EEC4013
EJ 7 12/23/2017
Q.12. The following is a dump of a TCP header in hexadecimal format.
05320017 00000001 00000000 500207FF 00000000
a. What is the source port number?
b. What is the destination port number?
c. What the sequence number?
d. What is the acknowledgment number?
e. What is the length of the header?
f. What is the type of the segment?
g. What is the window size?
h. Is the packet from client to server or vice versa ? and Why
EEC4013
EJ 8 12/23/2017
Q.13. What can you say about the TCP segment in which the value of the control field is one of the following?
a. 000000
b. 000001
c. 010001
Q.14. What is the maximum size of the TCP header? What is the minimum size of the TCP Header?
15. In TCP, if the value of HLEN is 0111, how many bytes of option are included in
the segment?
Q.16. Define the following :-
1. Metric :----------------------------------------------------------------------------------------
2. AS :--------------------------------------------------------------------------------------------
3. OSPF:-----------------------------------------------------------------------------------------
4. BGP:---------------------------------------------------------------------------------------------
EEC4013
EJ 9 12/23/2017
Q.17. What is the difference between a direct and an indirect delivery?
Q.18. List three forwarding techniques discussed in this chapter and give a brief description of each.
Q.19. Contrast two different routing tables .
Q.20. a. What is the purpose of RIP?
EEC4013
EJ 10 12/23/2017
b. What are the functions of a RIP message?
Q.21 List the four levels of addresses are used in an internet employing the TCP/IP protocols explaining the usage for each

Explanation / Answer

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We are required to do only 4 parts of question.

9. In a connection oriented service, communication(virtual) is established client and the server. This occurs in three phase :

Connection setup

Information transfer

Connection termination or teardown.

Whereas in a connectionless service, there is no need for the connection setup and connection termination phase and only phase required is information transfer. Each packet is independent from every other packet.

IPv4 follows a connectionless service.

13.

000000

All the control bits are set to zero.The segment given is a data transmission

which don't provide any acknowledgment

000001

Here only control bit set to 1 is FIN bit. This is a FIN segment which requests for the termination of the connection.

010001

Control bits set to 1 are the ACK and the FIN. This is response to connection termination request via FIN and a FIN+ACK is sent.

14. The maximum header size in a TCP header is 15 words or 60 bytes. And the minimum header size is 5 words or 20 bytes.

15. HLEN = 0111 = 7 (decimal)

Header length is scaled by a factor of 4. So, Actual header size =74=28B Out of which 20B are necessary and remaining 2820=8 hence 8 bytes are for options.

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