BSC CSIT Semester 4 – Computer Networks () Questions & Answers | Past TU Exam Papers

Question 1

What do you understand by DNS? Explain FTP and SFTP.

Marks: 5

Year: 2080 Final TU

DNS, FTP, and SFTP 1. DNS (Domain Name System) Definition: DNS is a system that translates human-readable domain names (like www.example.com) into IP addresses (like 192.168.1.1) used by computers

Question 2

Differentiate between IMAP and POP3. Explain SNMP.

Marks: 5

Year: 2080 Final TU

Question 3

Explain architecture of WWW. What is URL?

Marks: 5

Year: 2079 Final TU

Architecture of WWW and URL Architecture of WWW (World Wide Web) The World Wide Web (WWW) is a system where information is stored and accessed through web pages using the internet. It follows a clien

Question 4

Why do we need wireless LAN? Explain the architecture of IEEE 802.11 in detail.

Marks: 5

Year: 2076 Final TU

Why Do We Need Wireless LAN? Definition: A Wireless LAN (WLAN) allows devices to connect to a local area network without physical cables, using radio waves. Reasons for Using WLAN: 1. Mobility: User

Question 5

Why do we need a DNS system when we can directly use an IP address? What is domain name space?

Marks: 5

Year: 2076 Final TU

Why DNS is Needed - Humans find it difficult to remember numeric IP addresses like 172.217.5.110. - DNS (Domain Name System) translates human-friendly domain names (like www.google.com) into IP addr

Question 6

Write down the techniques used in the 802.12 protocol for wireless networks?

Marks: 5

Year: 2073 Final TU

Introduction IEEE 802.12 is a standard for Wireless Local Area Networks (WLANs) and is also referred to as the Demand Priority Protocol. It is primarily designed for high-speed LANs using a star top

Question 7

Discuss the idea used in public key encryption system.

Marks: 5

Year: 2073 Final TU

Introduction Public Key Encryption (PKE), also known as asymmetric encryption, is a cryptographic system that uses two separate keys: 1. Public Key: Can be shared openly and used to encrypt data.

Question 8

Mention the intra structure for network management.

Marks: 5

Year: 2073 Final TU

Introduction Network Management involves monitoring, controlling, and maintaining a computer network to ensure efficient and reliable operation. The infrastructure of network management includes the

Question 9

Discuss the working principle of DNS.

Marks: 5

Year: 2072 Final TU

Definition The Domain Name System (DNS) is a distributed naming system used to translate human-readable domain names (like www.google.com) into IP addresses (like 142.250.190.14) that computers use to

Question 10

Why is network management a challenging task?

Marks: 5

Year: 2072 Final TU

Introduction Network management involves monitoring, maintaining, and optimizing a computer network to ensure efficient, reliable, and secure operation. It includes tasks like fault management, conf

Question 11

Write short notes on: a. HTTP b. Backbone

Marks: 5

Year: 2072 Final TU

a. HTTP (Hypertext Transfer Protocol) - Definition: HTTP is an application layer protocol used for transferring hypertext documents (web pages) over the Internet. - Purpose: Enables communication be

Question 12

What are the features of the application layer? Why is DNS required? Explain about recursive, non- recursive, and iterative DNS queries.

Marks: 10

Year: 2081 Final TU

Features of the Application Layer The Application Layer is the topmost layer of the OSI and TCP/IP model. It provides services directly to the end users and enables applications to communicate over

Question 13

Difference between web server and proxy server.

Marks: 5

Year: 2081 Final TU

Difference Between Web Server and Proxy Server | Basis | Web Server | Proxy Server | |------------|----------------|------------------| | Definition | A web server stores, processes, and delivers web