Computer Networks (AL-602) - Important Questions

Explain the ISO-OSI reference model with a neat diagram and the functionalities of each layer.

Compare the OSI Reference Model and TCP/IP Model with layer-wise functionality and diagrams.

Explain the types of guided and unguided physical transmission media and the principles of bandwidth, data rate and data modulation and how they influence network performance.

Explain connection-oriented vs connectionless services, compare their differences and give examples of each.

Compare and explain Go-Back-N and Selective Repeat sliding window ARQ protocols with diagrams and example sequences.

Explain the need for flow control and describe/compare the data link layer flow control techniques Stop-and-Wait and Sliding Window protocols.

Explain the various error detection and correction mechanisms used in computer networks.

Explain the Binary Exponential Back-off algorithm and how it manages collisions in Ethernet networks, with suitable example.

Explain the MAC sublayer protocol and frame structure of IEEE 802.11.

Explain Data Link / MAC addressing and its types with examples.

Compare IPv4 and IPv6 protocols, including packet formats, differences, advantages, limitations and improvements.

Describe the Bellman-Ford routing algorithm and compare it with Dijkstra's algorithm.

Show how IPv4 fragmentation is performed for a 3000-byte IP packet over a link with MTU of 1000 bytes.

Explain connection establishment (three-way handshake) and connection release/termination (four-way handshake) in TCP/transport protocols, including why graceful termination is needed.

Discuss the congestion control and flow control mechanisms used in TCP.

Explain the architecture and working of the Simple Network Management Protocol (SNMP).