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 statements is/are incorrect?

A. A protocol is a set of rules that governs data communication. B. A protocol defines what is communicated, how it is communicated and when it is communicated. C. The key elements of protocols are syntax, encoding, and encryption. D. A protocol specification is usually tested and implemented by several different groups.

  1. A and B

  2. B and C

  3. C and D

  4. Only B

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both are wrong.

Multiple choice

Which of the following statements is correct?

  1. NIC is responsible for identifying operational problems and proposing solution to these problems.

  2. NIC is responsible for the management of internet domain names and addresses.

  3. NIC is responsible for long term research topics related to internet protocols, applications, architecture and technology.

  4. NIC is responsible for collecting and distributing information about TCP/IP.

  5. NIC is responsible for developing and reviewing specifications intended as internet standards.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Option 4 is correct.

Multiple choice

Which of the following statements is correct?

A. Both TCP and IP perform the same task and share the common responsibilities. B. TCP is responsible for segmentation, reassembly and error detection, while IP is responsible for datagram routing. C. IP is responsible for segmentation, reassembly and error detection, while TCP is responsible for datagram routing. D. TCP serves as the intermediary hardware to transfer data from one network to another, while IP is responsible for high level functions, such as encapsulation and the data gram.

  1. A

  2. B

  3. C

  4. D

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Option B is correct.

Multiple choice

Which of the following is correct about TTL Analysis in Information Security?

  1. The number of hops can be changed as per the requirement in TTL analysis.

  2. The number of hops remains constant in TTL analysis.

  3. It uses the standard called Reverse Path Forwarding (RPF).

  4. It works in case of IP spoofing.

  5. It can be applied in a transparent/bridge mode within a network for segmenting a subset of hosts.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is a correct statement.

Multiple choice

Which of the following statements is correct about IP port spoofing in Ethical hacking?

  1. In this spoofing, the IP addresses can be specified for the ports.

  2. In this spoofing, the source port cannot be modified.

  3. The attacker cannot look into the internal traffic.

  4. It shows the binding between IP and MAC addresses.

  5. It can cause Man-in-the-Middle attack also.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is correct as a firewall, that is not very well managed, can end up leaving stale rules in action, which can potentially lead certain outgoing ports on certain IP addresses to be open.

Multiple choice

Which layer of the OSI model is responsible for establishing, maintaining and transmiting a dialogue or a session between two end users?

  1. Presentation layer

  2. Physical Layer

  3. Session Layer

  4. Network Layer

  5. Application Layer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This layer establishes, manages and terminates connections between applications. The session layer sets up, coordinates, and terminates conversations, exchanges, and dialogues between the applications at each end. It deals with session and connection coordination.

Multiple choice

What does SSL stand for?

  1. System socket layer

  2. Secure sockets layer

  3. Secure system login

  4. Secure socket login

  5. Secure system login
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the right answer. 

Multiple choice

What does PPTP stand for?

  1. Point to Point Tunneling Protocol

  2. Point to Point Transmission Protocol

  3. Point to Point Transfer Protocol

  4. Point to Point Traffic Protocol

  5. Point to Point Translation Protocol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct answer.

Multiple choice

Which of the following choses the correct data path for an incoming message and forwards it to the relevant line?

  1. Remote concentrator

  2. Front end processor

  3. Message switcher

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

A message switcher (or message switch) is a network device that receives incoming messages and determines the correct routing path to forward them to the appropriate destination line or terminal. Front end processors handle protocol conversion, remote concentrators aggregate signals, and 'demur' is irrelevant.