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

What is information called on Layer 3?

  1. Frames

  2. Packets

  3. Data

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

In the OSI model, data is encapsulated into 'packets' at the Network Layer (Layer 3). Frames are used at Layer 2, and segments are used at Layer 4.

Multiple choice

What 3 protocols does the Network Layer include?

  1. IP, ICMP, and IGMP

  2. Routers, hubs, and cables

  3. IP, Ethernet, and Software

  4. Screen resolution, volume, and battery life
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IP (Internet Protocol), ICMP (Internet Control Message Protocol), and IGMP (Internet Group Management Protocol) are all fundamental protocols that operate at the Network Layer.

Multiple choice

What does the Network Layer control?

  1. Layer 3 of the OSI

  2. IP addresses

  3. The subnet

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

The Network Layer is responsible for managing logical network addressing and subnetting, which allows for the efficient organization and routing of data within a network.

Multiple choice

What is Layer 3 of the OSI model?

  1. The Network Layer

  2. The Data Link Layer

  3. The Physical Layer

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

In the standard 7-layer OSI model, Layer 1 is Physical, Layer 2 is Data Link, and Layer 3 is the Network Layer.

Multiple choice

A _____ is a TCP name for a transport service access point.

  1. port

  2. pipe

  3. node

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

In the TCP/IP model, a port number serves as the transport service access point. It allows the transport layer to distinguish between different applications or services running on the same host.

Multiple choice

Video streaming is an example of an application that uses TCP.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Video streaming typically uses UDP because it prioritizes speed and real-time delivery over the error correction and retransmission overhead inherent in TCP. Using TCP for live streaming often results in unacceptable latency.

Multiple choice

 Transmission control protocol ___________.

  1. is a connection-oriented protocol

  2. uses a three way handshake to establish a connection

  3. receives data from application as a single stream

  4. all of the mentioned
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

TCP is a connection-oriented protocol that uses a three-way handshake to establish a reliable session, and it processes data streams from the application layer.

Multiple choice

User Datagram Protocol is called connectionless because _____________?

  1. it sends data as a stream of related packets

  2. all UDP packets are treated independently by transport layer

  3. it is received in the same order as sent order

  4. it sends data very quickly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

UDP is connectionless because it does not establish a session before sending data. Each datagram is treated as an independent unit by the transport layer, with no relationship to previous or subsequent packets.

Multiple choice

Which of the following is a transport layer protocol?

  1. Internet Control Message Protocol

  2. Neighbor Discovery Protocol

  3. Stream Control Transmission Protocol

  4. Dynamic Host Configuration Protocol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SCTP (Stream Control Transmission Protocol) is a transport layer protocol designed to provide reliable, message-oriented communication. ICMP and NDP are network layer protocols, and DHCP is an application layer protocol.