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 the function of application layer in networking?

  1. This layer provides the network process to the software applications.

  2. This layer is responsible for presentation of data to the end users.

  3. This layer is responsible for the connection establishment to the networking medium.

  4. This layer is responsible for the delivery of datagrams between points on a network.

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

This is the function of application layer.

Multiple choice

Bridges operate in which OSI layer?

  1. Data link layer

  2. Network layer

  3. Transport layer

  4. Session layer

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

LANs can be connected by devices called bridges, which operate in the Data Link Layer.

Multiple choice

Features like character code translation, i.e. from ASCII to EBCDIC is provided by which OSI layer?

  1. Data link layer

  2. Transport layer

  3. Session layer

  4. Presentation layer

  5. Application layer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The presentation layer formats the data to be presented to the application layer. It can be viewed as the translator for the network. This layer may translate data from a format used by the application layer into a common format at the sending station then translate the common format to a format known to the application layer at the receiving station.The presentation layer provides character code translation: for example, ASCII to EBCDIC.

Multiple choice

Which of the following protocols uses TCP for file transfer and establishes two separate connections for commands and data?

  1. TFTP

  2. FTP

  3. TELNET

  4. NFS

  5. NTFS
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

FTP uses one connection for commands and the other for sending and receiving data. FTP has a standard port number on which the FTP server listens for connections. A port is a logical connection point for communicating using the Internet Protocol (IP). The standard port number used by FTP servers is 21 and is used only for sending commands. Since port 21 is used exclusively for sending commands, this port is referred to as a command port. For example, to get a list of folders and files present on the FTP server, the FTP Client issues a LIST command. The FTP server then sends a list of all folders and files back to the FTP Client. The port that is used for transferring data is referred to as a data port.

Multiple choice

The Leaky Bucket Algorithm is generally used in which OSI layer?

  1. Data link layer

  2. Network layer

  3. Physical layer

  4. Session layer

  5. Presentation layer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The network layer controls the operation of the subnet deciding,  which physical path the data should take based on network conditions, priority of service, and other factors. Congestion control is a feature of this layer. Leaky Bucket is a congestion control algorithm often used in this layer.