Full Marks: 60
Pass Marks: 24
Time: 3 hours

Attempt any two questions: (2 x 10 = 20)

1. Explain each layer of TCP/IP model in detail. Compare it with OSI model. (7+3)
2. Define transmission media. What are different types of transmission media? Explain different types of unguided media in detail. (2+8)
3. Define flow control. Explain Go-Back-N ARQ with suitable example. How is it different from Stop-and-Wait ARQ? (1+7+2)

Attempt any eight questions: (8 x 5 = 40)

4. Define network topology. Explain ring topology along with its merits and demerits. (1+4)
5. Explain LAN with example. How is it differnet from PAN? (3+2)
6. Define routing table. Differentiate static routing table with dynamic routing table. (2+3)
7. What is switching? Compare and contrast a circuit-switched network with a packet-switched network. (1+4)
8. Why do we need wireless LAN? Explain the architecture of IEEE 802.11 in detail. (2+3)
9. What is NAT? How does it work? What are its benefits? (1+2+2)
10. In a block of addresses, we know the IP Address of one host is 192.34.12.56/28. What are the first address (network address) and the last address (Limited broadcast address) in this block? (2.5+2.5)
11. Why do we need a DNS system when we can directly use an IP address? What is domain name space? (2+3)
12. Write short notes on: (2.5+2.5)
    • a. Connection oriented service
    • b. Bridge
    • c. Hamming distance