Data Communications and Networks

Explain various design issues of data link layer.

What is meant by term channelization. Explain in detail various channelization process.

Explain following in brief (Any five) :-

(a) What is meant by data communication? What are the characteristics of an efficient data communication system?

(b) State the differences between OSI and TCP/IP models.

(c) Explain IPv4 packet format.

(d) Can two hosts in different networks have same link layer address? Explain.

(e) Deline Switch and discuss the need for Switching

(f) What do you understand by tunneling?

(g) Explain HDLC protocol in detail including the frame structure.

(h) Explain Socket address and Berkeley Sockets in brief.

Explain distance vector routing algorithm with the help of a suitable example. 

What is Congestion? Explain different congestion control strategies.

What is FTP? How files are transferred using FTP?

Explain the mechanism of stop-and-wait ARQ.

What are the advantages of FDDI over a basic token ring?

For the bit sequence 1001110, Construct the Hamming code and calculate the number of parity bits that will be required to construct the Hamming code. 

Expand the address 0:15::1:12:1213 to its original and also find the class- following IP address.

i. 208.34.54.12

ii. 238.34 2.1

iii. 114.34.2.8

iv. 129.14.6.8 

Explain the DNS in terms of name space, resource record and name server.

Describe the following:-

(a) Leaky Bucket Algorithm

(b) Dynamic Host Control Protocol (DHCP)

An ISP is granted a block of addresses starting with 190.100.0.0/16 (65,536 addresses). The ISP needs to distribute these addresses three groups of customers as follows:

(a) The first group has 64 customers, each needs 256 addresses.

(b) The second group has 128 customers; each needs 128 addresses .

(c) The third group has 128 customers; each needs 64 addresses.

Design the sub blocks and find out how many addresses are still available after these allocations.