Computer Knowledge

Computer Networks

2,461 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 is/are FDDI MAC protocol timer(s)?

  1. Token rotation timers

  2. Valid transmission timer

  3. Token holding timer

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

FDDI MAC protocol uses three timers. Token holding timer - It determines duration for which a station can transmit after acquiring token.  Token rotation timer - It restarts after every token is seen. Valid transmission timer - It is used to time out and recover from certain transient ring errors.

Multiple choice

The first layer in OSI reference model is

  1. transport layer

  2. network layer

  3. data link layer

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

The OSI model consists of seven layers. The first layer, at the bottom, is the Physical layer, which deals with the transmission of raw bit streams over a physical medium.

Multiple choice

The third layer in OSI reference model is

  1. transport layer

  2. network layer

  3. data link layer

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

The third layer of the OSI model is the Network layer, which is responsible for routing data packets between different networks.

Multiple choice

The fifth layer in OSI reference model is

  1. session layer

  2. presentation layer

  3. application layer

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

The fifth layer of the OSI model is the Session layer, which manages and terminates connections between applications.

Multiple choice

The fourth layer in OSI reference model is

  1. transport layer

  2. network layer

  3. data link layer

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

The fourth layer of the OSI model is the Transport layer, which ensures reliable data transfer and error recovery between end systems.

Multiple choice

TPDU means

  1. Transport Protocol Data Unit

  2. Transfer Protocol Data Unit

  3. Transmission Protocol Data Unit

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

TPDU stands for Transport Protocol Data Unit, which is the unit of data exchanged between transport layer entities.

Multiple choice

The second layer in OSI reference model is

  1. transport layer

  2. network layer

  3. data link layer

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

The second layer of the OSI model is the Data Link layer, which provides node-to-node data transfer and error detection for the physical layer.

Multiple choice

The seventh layer in OSI reference model is

  1. session layer

  2. presentation layer

  3. application layer

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

The seventh and top layer of the OSI model is the Application layer, which provides network services directly to user applications.

Multiple choice

The sixth layer in OSI reference model is

  1. session layer

  2. presentation layer

  3. application layer

  4. data link layer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sixth layer of the OSI model is the Presentation layer, which handles data formatting, encryption, and compression.

Multiple choice

The remote login is an example for

  1. message stream

  2. byte stream

  3. connectionless service

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

Remote login (like SSH or Telnet) requires a continuous, reliable flow of characters between the client and the server. This is the classic use case for a byte stream.

Multiple choice

The registered mail is an example for

  1. message stream

  2. byte stream

  3. connection oriented service

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

Registered mail implies a reliable, ordered, and connection-oriented delivery process, which is analogous to a byte stream or reliable connection-oriented service in networking contexts.