Computer Networks (CS-602) - Important Questions

Compare connection-oriented and connectionless services.

Compare the OSI reference model and the TCP/IP model, with diagrams.

Define computer network and explain its goals/importance, components, applications, and merits/demerits.

Explain the operating principles and importance of the OSI reference model, including encapsulation with headers and trailers added to user data.

Discuss design issues in computer networks and explain the concepts of connection-oriented and connectionless services.

Explain the principles of physical transmission media, bandwidth, data rate, and data modulation.

Explain the working of the ISO-OSI reference model with functions of all seven layers.

Write short notes on connection-oriented service, ARP, CSMA/CA, and DNS.

Give explanation of different type of topologies in terms of its advantages and disadvantages.

We measure the performance of a line ($4 \text{ kHz}$ of Bandwidth) when the signal is $20V$, the noise is $6mV$. Calculate the Maximum data rate supported by this line.

Define the term data rate, bandwidth with taking a suitable example.

Write a short note on any two:

Explain the working principle of Go-Back-N ARQ and Selective Repeat ARQ protocols with examples.

Explain the functions of the Data Link Layer and discuss framing techniques in detail.

Describe flow control techniques and compare Stop-and-Wait and Sliding Window protocols.

What is the advantage of Go-Back-N protocol, how is the parameter n determined, and how does it handle errors, lost packets or ACKs?

Define error detection, list its methods, and encode a given data word using even-parity Hamming code.

Explain Stop-and-Wait, Go-Back-N, and Selective Repeat protocols with suitable diagrams.

Explain the error control and flow control mechanisms used at the data link layer.

Explain the working of ARP and RARP.

What is the data link layer and what are services does it provides?

Explain the mechanism of sliding window flow control with an example.

What is finite state machine model? How finite state machines are used in the study of network protocols? Explain.

Explain FDDI, ARP, ICMP and UDP with examples.

Explain MAC addressing and the Binary Exponential Backoff (BEB) algorithm.

Compare CSMA/CD and CSMA/CA protocols.

Describe IEEE 802 LAN standards and explain the architecture of Local Area Networks.

Discuss the strategies used to avoid collisions in CSMA/CA.

Define Pure ALOHA and Slotted ALOHA and derive that efficiency of Slotted ALOHA is twice that of Pure ALOHA.

Explain the CSMA/CD protocol in detail.

Explain Binary Exponential Back-off (BEB) with suitable example.

Explain persistent and non-persistent CSMA protocols.

State function of MAC layer and explain Pure and Slotted ALOHA and CSMA protocols.

What do you understand by collision free protocol? Explain the Binary Count Down Protocol with suitable example.

Explain the working principle of Slotted ALOHA with suitable sketch.

Calculate maximum number of stations N sharing a Pure ALOHA channel given channel rate, frame size and arrival rate.

Compare IPv4 and IPv6 protocols, including their features, advantages and limitations.

Given the address block $211.17.180.0/24$, create 32 subnets and find the subnet mask, number of addresses per subnet, and first and last addresses in the first and last subnets

Explain the functions of the Network Layer and discuss different switching techniques.

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

Explain the different classes of IP addresses in terms of network-ID and host-ID bits, number of networks and hosts, and address range, including subnet mask concept

Explain the working principle of the Bellman-Ford / Distance Vector routing algorithm with a suitable example.

Explain the Fragmentation and reassembly using suitable example.

Give the basic difference between broad cast and multicast routing.

Describe the working principle of Least Cost Routing using suitable example.

Write a brief note on ICMP (Internet Control Message Protocol) using its frame formats.

Explain Simple Network Management Protocol (SNMP), its architecture, working and functions.

Discuss TCP flow control and TCP congestion control mechanisms

Calculate the maximum throughput and line efficiency for TCP windows of 65535 B over a 1 Gbps channel with 10 msec one-way delay.

Compare the TCP header and the UDP header, listing TCP header fields not present in UDP and giving the reason for each.

Explain the services and functions of the Transport Layer.

Write short notes on TCP header format, TCP flow control, ICMP, and Bellman-Ford algorithm.

Write a short note on TCP Congestion Control (as choice among topics)

What are the various Quality of Service (QoS) parameters offered by the transport layer and what is their significance?

Draw and explain the header format of a User Datagram Protocol (UDP).

What is Electronic Mailing. What are different ways of sending electronic mail (E-mail)? Discuss in detail.

Explain the connection establishment and connection release in Transport protocols.

Explain routing and congestion control

Describe the Frame Relay Protocol Architecture and explain the functions of each one.

Discuss Internet services standards for TCP/IP and the process of standardization for RFCS and TCP/IP.