Computer Knowledge

Computer Networks

2,614 Questions

Computer networks involve the architecture, protocols, and security measures used for digital communication. This collection covers OSI model layers, IP addressing, data transmission, and cryptographic standards. These concepts are vital for the computer knowledge sections of banking and government exams.

OSI model layersNetwork protocolsIP subnet maskingData encryption standardsServer configurationsNetwork commands

Computer Networks Questions

Multiple choice

Which of the following security techniques also called bastion host looks to the inside as if it is the outside connection, while to the outside it responds just as the insider would?

  1. Packet filtering gateway

  2. Application proxy gateway

  3. Non repudiation

  4. Transport layer security

  5. Message authentication code

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This security technique also called bastion host looks to the inside as if it is the outside connection while to the outside it responds just as the insider would.

Multiple choice

Which of the following is true about the IP address?

  1. It is divided into exactly two classes

  2. It contains a fixed-length hosted

  3. It was established as a user - friendly interface

  4. It is 32 bits long
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

IPv4 addresses are 32 bits long, represented as four 8-bit octets. IP addresses are divided into five classes (A, B, C, D, E), not two. The 'hosted' in option B is unclear, and IP addresses existed before user-friendly interfaces became a design focus.

Multiple choice

Which IP address class has few hosts per network?

  1. A

  2. B

  3. C

  4. D
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

IP address classes determine network and host portions. Class A has many hosts per network (16M+), Class B has moderate (65K), while Class C has the fewest - only 254 usable hosts per network. Class C was for small organizations.

Multiple choice

UDP(user datagram protocol)is

  1. virtual connection oriented protocol

  2. communication protocol

  3. data link layer protocol

  4. connectionless protocol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

UDP is a connectionless transport-layer protocol. Unlike TCP, it doesn't establish connections before sending data. This makes UDP faster but unreliable - packets may arrive out of order or not at all. UDP operates at Layer 4 (transport), not Layer 2 (data link).

Multiple choice

Which of the following can involve Remote login?

  1. NVT

  2. TELNET

  3. TCP/IP

  4. Both (1) and (2)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

TELNET is a protocol for remote login that allows a user to connect to a remote computer and work as if directly connected. NVT (Network Virtual Terminal) is the virtual terminal concept used within TELNET to standardize communication between different systems.

Multiple choice

Which of the following is a protocol?

  1. FRP

  2. NET BIOS

  3. HTML

  4. TRP/IP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

NetBIOS (Network Basic Input/Output System) is indeed a protocol that allows applications on different computers to communicate over a local area network. It operates at the session layer and provides services for session management and resource access.

Multiple choice

Which of the following is a retrieval only method?

  1. HTTP

  2. FTP

  3. TELNET

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

HTTP is primarily a retrieval protocol designed for requesting and receiving resources from web servers. Unlike FTP or TELNET which allow bidirectional operations, HTTP follows a request-response model where clients retrieve data from servers without persistent modification capabilities.

Multiple choice

Which of the following tools receives flow of the data directly from the monitored devices and analyse the data to gain the high level perspective across the network?

  1. Protocol analyzer

  2. Traffic flow analyzer

  3. Monitoring and analyzing net flow

  4. Lattice flow

  5. Client side diagnostic tool
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This tool receives flow of the data directly from the monitored devices and analyse the data to gain the high level perspective across the network.