1.a. What are the different types of Topology? Explain any one.

1.b. Define FHSS and explain how it achieves bandwidth spreading.

2.a. Explain 802.11 Wireless frame format.

2.b. For the bit sequence 10000101111 draw the waveform for

i) Manchester Encoding

ii) Different Manchester Encoding.

3.a. Measurement of sorted AI.OHA channel with an infinite number of users,show that 20 percent of the slots are idle:

i) what is the channel loud?

ii) What is the throughput?

3.b. Explain MAC 802.3 frame format.

4.a. Explain the working of cyclic redundancy check (CRC) using the following example (show the complete steps of division)

Data bits : 1101110110

Generator polynomial: x³ + x + 1

Write the redundant bits that will be sent along with the data bits.

4.b. Compare the contrast the Go-Back-N ARQ protocol with selective repeat ARQ

5.a. A host was given the 192.168.2.64/27 IP address, indicate:

i) Netmask of the network

ii) The network broadcast address to which the host belongs.

iii) The total number of hosts available in the network.

5.b. Explain Distance Vector Routing Algorithm.

5.c. Write short notes on Network Address Translation.

6.a. Host A sends a UDP datagram containing 8880 bytes of user data to host B over an Ethernet LAN. Ethernet frames may carry data up to 1500bytes (i.e. MTU1500 bytes). Size of UDP header is 8 bytes and size of IP header is 20 bytes. There is no option field in IP header. How may total number of IP fragments will be transmitted and what will be the ccontents of offset field in the last fragment?

6.b. Describe in short the importance and working of ARC protocol. What is the ARP cache?

6.c. What is ICMP?

7.a. What cause silly window syndrome? How is it avoided ? Explain.

7.b. Differentiate between TCP and UDP protocol.

7.c. Following is a dump of UDP header in Hexadecimal format.

06 32 00 0D 1C E2 17

i) What is the source port number?

Ii) What is the destination source port number?

iii) What is the total length of the user datagram?

iv) What is the length of the data?

v) Is packet directed form a client to server or vice versa?

vi) What is the client process?

8.a. In a Stop-and-Wait system, the bandwidth of the line is 1 Mbps, and 1 bit takes 10 milliseconds to make a round trip. What is the bandwidth- delay product? If the system data packets are 1,000 bits in length, what is the utilization percentage of the link?

8.b. What are the types of socket? Explain Various socket primitives used in connection oriented client server approach.

8.c. Explain the transition diagram of TCP.

9.a. Explain HTTP request and reply message format.

9.b. Write short notes on

i) DHCP

ii) MIME

9.c. Explain Various FTP commands.

10.a. Define FTP. Can we specify file transfer in a web page? Explain with the help of suitable example.

10.b. Explain working of IMAP.

10.c. What is DNS? Explain its various resources records with one example.