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

The physical layer transmits raw _____.

  1. bits

  2. frames

  3. packets

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

The physical layer is the lowest layer of the OSI model and is responsible for the transmission and reception of raw bit streams over a physical medium.

Multiple choice

SPDU means

  1. Standard Protocol Data Unit

  2. Session Protocol Data Unit

  3. Seperate Protocol Data Unit

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

SPDU stands for Session Protocol Data Unit. It is the unit of data exchanged between session layer entities.

Multiple choice

The unit exchanged in presentation layer is

  1. TPDU

  2. SPDU

  3. PPDU

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

In the OSI model, the Presentation Layer (Layer 6) is responsible for data translation, encryption, and compression. The data unit used at this layer is the Presentation Protocol Data Unit (PPDU).

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.