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

On which layer does bridge operates?

  1. Data Link Layer

  2. Application Layer

  3. Network Layer

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

 Data link layer provides a raw transmission facility on a reliable link.It is responsible for moving frames from one node to the next.The following are the responsibilities of data link layer:framing,error control,access control,flow  control and physical addressing. It delivers data on the data link layer by hop-to-hop and a bridge operates on this layer between two adjacent nodes, so this is the correct answer.

Multiple choice

The UDP and INTERNET protocol suites are related to

  1. layer 4

  2. layer 2

  3. layer 3

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Layer -4 is a transport layer in which UDP (user datagram protocol ) and IP (internet protocol ) are present. There are five classes of standards for transport layer, which differ in degree of error recovery. 

Multiple choice

Which layer addresses are recognized by bridge?

  1. Data link layer

  2. Physical layer

  3. Layer 2

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

Bridges are network devices which work on first two layers of OSI model with filtering and forwading capabilities.

Multiple choice

Which of the following processes handles the External Data Representation (XDR) protocol to provide an agreement between the data syntax running between the different platforms in computer network?

  1. Application-specific processes

  2. Host-specific processes

  3. Network-specific processes

  4. Process

  5. Program
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The External Data Representation (XDR) protocol is handled by Application-specific processes (Presentation layer in OSI model) to standardize data format across different platforms. XDR ensures that data can be interpreted correctly regardless of the sender's or receiver's architecture. Network-specific and host-specific processes handle routing and interface issues, not data syntax standardization.

Multiple choice

A 1250 byte transmission unit carried on the wire over the network is the result of sending a message with a protocol stack with DNS, UDP, IP, PPP, and SONET. Each protocol header is 20 bytes long. What percentage of the network bandwidth on the wire is spent carrying the message data?

  1. 92.6

  2. 93

  3. 92

  4. 8

  5. 7.4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is correct as the headers comprise in total of 100 bytes, so message is 1150 bytes. Hence, percentage of message is (1150/1250)X100 = 92%.