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Multiple Choice Questions:

Each question is for 1 mark


1. Which one is a Collision free technique?

a) CSMA/CD             b) AlOHA           c) CSMA           d) Token Passing .


2. Which channel access is used in IEEE 802.5 Network?

a) Token Ring          b) Token Bus              c) CSMA/CD     d) All of these.

3. Which class of IP address is reserved for multicast communication?

a) Class D                     b) Class B                c) Class C               d) Class A .

4. For a 4-bit sliding window, sequence number range is………………...

a) 0 to 7                 b) 0 to 15               c) 1 to 16               d) 8 to 15.

5. How much channel output of slotted ALOHA will be there in comparison to pure ALOHA?

a) Same as ALOHA
b) Double of ALOHA          
c) Three times of ALOHA          
d) None of these.

6. ICMP resides at the same layer as which of the following protocols mentioned below?

a) TCP                       b) UDP                 c) IP                    d) ARP

7. Which channel access is used for Ethernet network?

a) Token Ring               b) Token Bus          c) CSMA/CD              d) All of these.

8. When a host knows its IP address but not its physical address, it can use

a) RARP                   b) ICMP                      c) ARP                        d) IGMP.

9. For selective repeat window protocol, the receiver window size is,

a) Greater than 1              b) One                  c) Two             d) None of these.

10. Hamming Code is used for............

a) Error detection            
b) Error correction        
c) Error encapsulation  
d) Both a & b


Short Answer Type Questions

Each question is for 5 marks


1. A Network has Subnet Mask 255.255.255.224. Determine the maximum no of host in this network. Along with this, find out the broadcast address of this particular network.  (1+2+2)

2. What is the purpose of subnetting? Find the netid and the hostid of the following IP Addresses: a) 19.34.21.5 ; b) 220.34.8.9.  (1+2+2)

3. Explain the mechanism of Link Sate Routing with an example of your own.

4. Explain the working principle of DNS, with proper diagram.

5. Why CSMA/CA is better than CSMA/CD. Explain technically, with the help of derivation of their algorithm.

6. What is Bit rate? What is Baud rate? An analog signal carries 4 bits in each signal unit; if 1000 signal units are sent per second, find the Bit rate and Baud rate.      (1+1+3)

7. Suppose a system uses Stop and Wait protocol with propagation delay 20ms. If the frame size is 160 bits and bandwidth is 4 kbps, then calculate the channel utilization or efficiency.


Long Answer Type Questions

Each question is for 15 marks

1. State the advantages of IPV6 over IPV4. Explain the mechanism of Link Sate Routing with an example of your own. Differentiate between ARP and RARP.   
(5+5+5)

2. Write short notes on the following:        (5*3)
a)   CSMA/CD.
b)   Distance Vector Routing. Give example.
c) DNS.


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