Computer Network Most Important 30 MCQs

1. Which of these is a standard interface for serial data transmission?

a) ASCII
b) RS232C
c) 2
d) Centronics

2. Which type of topology is best suited for large businesses which must carefully control and coordinate the operation of distributed branch outlets?

a) Ring
b) Local area
c) Hierarchical
d) Star

3. Which of the following transmission directions listed is not a legitimate channel?

a) Simplex
b) Half Duplex
c) Full Duplex
d) Double Duplex

4. "Parity bits" are used for which of the following purposes?

a) Encryption of data
b) To transmit faster
c) To detect errors
d) To identify the user

5. What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interferences?

a) Unshielded twisted pair
b) Optical fiber
c) Coaxial cable
d) Microwave

6. A collection of hyperlinked documents on the internet forms the ?.

a) World Wide Web (WWW)
b) E-mail system
c) Mailing list
d) Hypertext markup language

7. The location of a resource on the internet is given by its?

a) Protocol
b) URL
c) E-mail address
d) ICQ

8. The term HTTP stands for?

a) Hyper terminal tracing program
b) Hypertext tracing protocol
c) Hypertext transfer protocol
d) Hypertext transfer program

9. A proxy server is used as the computer?

a) with external access
b) acting as a backup
c) performing file handling
d) accessing user permissions

10. Which one of the following would breach the integrity of a system?

a) Looking the room to prevent theft
b) Full access rights for all users
c) Fitting the system with an anti-theft device
d) Protecting the device against willful or accidental damage

11. Which software prevents the external access to a system?

a) Firewall
b) Gateway
c) Router
d) Virus checker

12. Which one of the following is a valid email address?

a) javat@point.com
b) gmail.com
c) tpoint@.com
d) javatpoint@books

13. Which of the following best describes uploading information?

a) Sorting data on a disk drive
b) Sending information to a host computer
c) Receiving information from a host computer
d) Sorting data on a hard drive

14. Which one of the following is the most common internet protocol?

a) HTML
b) NetBEUI
c) TCP/IP
d) IPX/SPX

15. Software programs that allow you to legally copy files and give them away at no cost are called which of the following?

a) Probe ware
b) Timeshare
c) Shareware
d) Public domain

16. The term FTP stands for?

a) File transfer program
b) File transmission protocol
c) File transfer protocol
d) File transfer protection

17. At what speed does tele-computed refer?

a) Interface speed
b) Baud rate
c) Cycles per second
d) Megabyte load

18. Which one of the following is not a network topology?

a) Star
b) Ring
c) Bus c)
d) Peer to Peer

19. The maximum length (in bytes) of an IPv4 datagram is?

a) 65535
b) 32
c) 1024
d) 512

20. Which of the following statements could be valid with respect to the ICMP (Internet Control Message Protocol)?

a) It reports all errors which occur during transmission.
b) A redirect message is used when a router notices that a packet seems to have been routed wrongly.
c) It informs routers when an incorrect path has been taken.
d) The "destination unreachable" type message is used when a router cannot locate the destination.

21. The IP network 192.168.50.0 is to be divided into 10 equal sized subnets. Which of the following subnet masks can be used for the above requirement?

a) 255.243.240
b) 255.255.0.0
c) 255.255.0
d) 255.255.255.0

22. When the mail server sends mail to other mail servers it becomes ___ ?

a) SMTP client
b) SMTP server
c) Peer
d) Master

23. The length of an IPv6 address is?

a) 32 bits
b) 128 bits
c) 32 bits
d) 256 bits

24. In the cryptography, the sequence of the letters is rearranged by?

a) Transposition ciphers
b) Substitution ciphers
c) Both a and b
d) None of these

25. Which of the following address belongs class A?

a) 121.12.12.248
b) 130.12.12.248
c) 128.12.12.248
d) 129.12.12.248

26.Which of the following is correct IPv4 address?

a) 124.201.3.1.52
b) 01.200.128.123
c) 128.64.0.0
d) 10110011.32.16.8

27. Which of the following IP addresses can be used as (a) loop-back addresses?

a) 0.0.0.0
b) 127.0.0.1
c) 255.255.255.255
d) 0.255.255.255

28. The term WAN stands for?

a) Wide Area Net
b) Wide Access Network
c) Wide Area Network
d) Wide Access Net

29. Which of the following cannot be used as a medium for 802.3 ethernet?

a) A thin coaxial cable
b) A twisted pair cable
c) A microwave link
d) A fiber optical cable

30. What IP address class allocates 8 bits for the host identification part?

a) Class A
b) Class B
c) Class C
d) Class D