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

The unit exchanged in session layer is

  1. TPDU

  2. SPDU

  3. PPDU

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

The session layer manages sessions between applications and uses Session Protocol Data Units (SPDU) for its communication.

Multiple choice

The acknowledgement frames are sent by the

  1. sender

  2. receiver

  3. both (1) and (2)

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

Acknowledgement frames are sent by the receiver to inform the sender that the data frame was received successfully.

Multiple choice

Which of the following is true about physical layer of the OSI model?

  1. Controls error detection and correction

  2. Constructs packet of data and sends them across the network

  3. Defines the electrical characterstics of the signals passed between the computer and communication devices

  4. Responsible for dialogue control and token management

  5. Encryption and decryption
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct.

Multiple choice

Which layers of the OSI model are implemented in MAN?

  1. Bottom two layers

  2. Only physical layer

  3. Bottom three layers

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bottom three layers of OSI model are implemented by MAN. MAN size is greater than LAN so bottom three layers have the capabilities of proper delivery of packets.

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.