Computer Networking Quiz (or) Computer Networking MCQ (Multiple Choice Questions)

1 .

DNS database contains _______

A)

Name server records

B)

Hostname aliases

C)

Hostname-to-address records

D)

All of the Above

Correct Answer : Option (D) : All of the Above

Explanation : Domain Name system not only deals with mapping IP addresses with the hostname but also deals with exchange of information in the server.

2 .

Wildcard domain names start with label _______

A)

*

B)

&

C)

#

D)

@

Correct Answer : Option (A) : *

Explanation : A wildcard DNS record matches requests to a non existent domain name. This wildcard DNS record is specified by using asterisk “*” as the starting of a domain name.

3 .

The right to use a domain name is delegated by domain name registers which are accredited by _______

A)

internet society

B)

internet architecture board

C)

internet research task force

D)

internet corporation for assigned names and numbers

Correct Answer : Option (D) : internet corporation for assigned names and numbers

Explanation : The ICANN (Internet Corporation for Assigned Names and Numbers) deals with IP address space allocation, protocol identifier assignment, generic and country code Top Level domain name system management (gTLD and ccTLD).

4 .

Secure shell (SSH) network protocol is used for _____

A)

Secure data communication

B)

Remote command-line login

C)

Remote command execution

D)

All of the Above

Correct Answer : Option (D) : All of the Above

Explanation : SSH provides high encryption and security features while communicating through a network. It is a cryptographic network protocol.

5 .

SSH can be used in ___________

A)

Windows

B)

Unix-like operating systems

C)

Both unix-like and windows systems

D)

None of the above

Correct Answer : Option (C) : Both unix-like and windows systems

Explanation : SSH isn’t confined to a certain network or operating system. It can be implemented over different networks and on different operating systems.

6 .

SSH uses ______ to authenticate the remote computer.

A)

private-key cryptography

B)

public-key cryptography

C)

both public-key & private-key

D)

any of public-key or private-key

Correct Answer : Option (B) : public-key cryptography

Explanation : Public encryption key is slower but more flexible. Every cryptographic security system requires a private key for private access and a public key for location.

7 .

Which standard TCP port is assigned for contacting SSH servers?

A)

port 22

B)

port 23

C)

port 24

D)

port 25

Correct Answer : Option (A) : port 22

Explanation : Port 22 is used for contacting ssh servers, used for file transfers (scp, sftp) and also port forwarding.

8 .

Which one of the following is a file transfer protocol using SSH?

A)

SCP

B)

SFTP

C)

Rsync

D)

All of the above

Correct Answer : Option (D) : All of the above

Explanation : SCP (Secure copy protocol), SFTP (SSH File Transfer Protocol) and Rsync all are file transfer protocols which are used by SSH.

9 .

SSH-2 does not contain _________

A)

transport layer

B)

connection layer

C)

physical layer

D)

user authentication layer

Correct Answer : Option (C) : physical layer

Explanation : SSH2 is a more secure, portable and efficient version of SSH that includes SFTP, which is functionally similar to FTP, but is SSH2 encrypted.

10 .

SCP protocol is evolved from _______ over SSH.

A)

GCP protocol

B)

DHCP protocol

C)

RCP protocol

D)

MGCP protocol

Correct Answer : Option (C) : RCP protocol

Explanation : RCP is the abbreviation for Rate Control Protocol is a congestion control algorithm for fast user response times.