• Attempt any five questions.
• All questions carry equal marks.
Explain the ISO-OSI model of computer network with a neat diagram.
Explain connectionless and connection oriented services. Give examples of each.
With a neat diagram explain in detail about the Network architecture.
Distinguish between peer-to-peer relationship and a primary-secondary relationship.
Explain TCP/IP Model.
Explain the frame format, operation and ring maintenance feature of IEEE 802.5 MAC protocol.
Explain the various error detection and correction mechanisms used in computer network.
Describe sliding window protocol using Go back n.
Explain distributed random access schemes/contention schemes for data services.
Explain MAC sub layer protocol and frame structure of IEEE 802.11.
Compare IPv4 and IPv6.
Explain Dijkstra's algorithm for routing. Discuss its limitations.
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 to 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.
Write brief notes: (i) SMTP (ii) Congestion Control (iii) DNS (iv) SNMP.
