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 protocol is used for audio and video streaming over the internet?

  1. Transmission Control Protocol

  2. User Datagram Protocol

  3. Internet Message Access Protocol

  4. Real Time Transport Protocol

  5. File Transfer Protocol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Real Time Transport Protocol (RTP) has been around for a long time and is often used for audio and video streaming. So, this is the answer.

Multiple choice

When something unexpected occurs over the internet, the event is reported by

  1. Transmission Control Protocol

  2. Internet Message Access Protocol

  3. Hypertext Transfer Protocol

  4. Internet Control Message Protocol

  5. Spanning Tree Protocol

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

ICMP (Internet Control Message Protocol) is a message control and error-reporting protocol between the host servers. So, this is the correct option.

Multiple choice

The address resolution protocol (ARP) is used for

  1. finding the IP address from the DNS

  2. finding the IP address of the default gateway

  3. finding the IP address that corresponds to a MAC address

  4. finding the MAC address that corresponds to an IP address

  5. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct answer; it resolves the IP address and finds its corresponding MAC address.

Multiple choice

In OSI model, which of the following layers transforms information from machine format to a format understandable by user?

  1. Application

  2. Presentation

  3. Session

  4. Physical
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Presentation layer (Layer 6) transforms information from machine-readable format to human-understandable format. It handles data representation, encoding, formatting, encryption/decryption, and character set conversions. The Application layer provides user services, Session layer manages connections, and Physical layer handles raw bit transmission.

Multiple choice

Which layer of OSI determines the interface of the system with the user?

  1. Network

  2. Application

  3. Data-link

  4. Session
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Application layer (Layer 7) determines the interface of the system with the user. It provides network services directly to user applications and is the closest layer to the end user. Network layer handles routing, Data-link layer handles node-to-node communication, and Session layer manages session establishment and termination.

Multiple choice

Which of the following layer protocols is responsible for user and application program support such as passwords, resource sharing, file transfer and network management?

  1. Layer 7 protocol

  2. Layer 6 protocol

  3. Layer 5 protocol

  4. Layer 4 protocol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Layer 7 (Application layer) protocols are responsible for user and application program support including passwords, resource sharing, file transfer, and network management. This layer directly supports application-level services. Layers 6, 5, and 4 handle presentation, session management, and transport respectively, not these user-facing services.

Multiple choice

How many hosts are attached to each of the local area networks at your site?

  1. 128

  2. 254

  3. 256

  4. 64
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a Class C network (which uses 24 bits for network address and 8 bits for host addresses), the total number of addresses is 256 (2^8). However, the network address (all zeros) and broadcast address (all 255s) are reserved, leaving 254 usable host addresses. This is a standard networking concept for IP address allocation.

Multiple choice

Pick the correct statement.

  1. In connection-oriented service, the destination address is to be specified only during the setup.

  2. Initial setup is not possible in connectionless service.

  3. Packet sequencing is not guaranteed in connection-oriented service.

  4. Initial setup is required for connectionless service.
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice

End-to-end connectivity is provided from host-to-host in

  1. network layer

  2. transport layer

  3. session layer

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The transport layer (Layer 4) provides end-to-end connectivity between hosts, handling reliable data delivery, flow control, and error recovery. The network layer only handles hop-to-hop routing.