This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “TCP IP PROTOCOL ”.

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1. An IP packet is called a _____________.

  • user datagram
  • segment
  • datagram
  • none of the above

2. A TCP packet is called a _____________.

  • user datagram
  • segment
  • datagram
  • none of the above

3. A UDP packet is called a _____________.

  • user datagram
  • segment
  • datagram
  • none of the above

4. An IP packet is encapsulated in a _____________.

  • data link frame
  • network layer packet
  • physical layer packet
  • none of the above

5. A TCP packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • physical layer packet
  • none of the above

6. A UDP packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • physical layer packet
  • none of the above

7. An ARP packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • physical layer packet
  • none of the above

8. A RARP packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • physical layer packet
  • none of the above

9. An ICMP packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • physical layer packet
  • none of the above

10. An IGMP packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • physical layer packet
  • none of the above

11. An application-layer packet is encapsulated in a(n) _____________.

  • data link frame
  • IP datagram
  • TCP or UDP packet
  • none of the above

12. An IP address is _________ bits.

  • 24
  • 32
  • 48
  • none of the above

13. An IP address is _______ bytes in dotted decimal notation.

  • 3
  • 4
  • 5
  • none of the above

14. A class B address starts with the _________bit(s).

  • 0
  • 10
  • 110
  • 1111

15. A class E address starts with the _________bit(s).

  • 0
  • 10
  • 1110
  • 1111

16. A class C address starts with the _________bit(s).

  • 0
  • 10
  • 110
  • 1110

17. A class A address starts with the _________bit(s).

  • 0
  • 10
  • 1110
  • 1111

18. A class D address starts with the _________bit(s).

  • 0
  • 10
  • 1110
  • 1111

19. What is the class of the address 227.78.19.21?

  • A
  • B
  • C
  • D

20. What is the class of the address 130.8.119.1?

  • A
  • B
  • C
  • D

21. What is the class of the address 10.11.1.21?

  • A
  • B
  • C
  • D

22. What is the class of the address 200.66.10.21?

  • A
  • B
  • C
  • D

23. What is the class of the address 248.22.33.1?

  • A
  • B
  • C
  • E

24. What is the netid of the address 227.78.19.21?

  • 227
  • 227.78
  • 227.78.19
  • none of the above

25. What is the netid of the address 130.8.119.1?

  • 130
  • 130.8
  • 130.8.119
  • none of the above

26. What is the netid of the address 12.11.1.21?

  • 12
  • 12.11
  • 12.11.1
  • none of the above

27. What is the netid of the address 200.66.10.21?

  • 200
  • 200.66
  • 200.66.10
  • none of the above

28. What is the hostid of the address 248.22.33.1?

  • 22.33.1
  • 33.1
  • 1
  • none of the above

29. What is the hostid of the address 227.78.19.21?

  • 78.19.21
  • 19.21
  • 21
  • none of the above

30. What is the hostid of the address 130.8.119.1?

  • 8.119.1
  • 119.1
  • 1
  • none of the above

31. What is the hostid of the address 12.11.1.21?

  • 11.1.21
  • 1.21
  • 21
  • none of the above

32. What is the hostid of the address 200.66.10.21?

  • 66.10.21
  • 10.21
  • 21
  • none of the above

33. What is the address of the network to which the host 248.22.33.1 is connected (no subnetting)?

  • 248.22.33.0
  • 248.22.0.0
  • 248.0.0.0
  • none of the above

34. What is the address of the network to which the host 227.78.19.21 is connected (no subnetting)?

  • 227.78.19.0
  • 227.78.0.0
  • 227.0.0.0
  • none of the above

35. What is the address of the network to which the host 130.8.119.1 is connected (no subnetting)?

  • 130.8.119.0
  • 130.8.0.0
  • 130.0.0.0
  • none of the above

36. What is the address of the network to which the host 12.11.1.21 is connected (no subnetting)?

  • 12.11.1.0
  • 12.11.0.0
  • 12.0.0.0
  • none of the above

37. What is the address of the network to which the host 200.66.10.21 is connected (no subnetting)?

  • 200.66.10.0
  • 200.66.0.0
  • 200.0.0.0
  • none of the above

38. The network address in class C (without subnetting) has _______ zero(s) in decimal notation.

  • 3
  • 2
  • 1
  • none of the above

39. The network address in class A (without subnetting) has _______ zero(s) in decimal notation.

  • 3
  • 2
  • 1
  • none of the above

40. The network address in class B (without subnetting) has _______ zero(s) in decimal notation.

  • 3
  • 2
  • 1
  • none of the above

41. The network address in Class E (without subnetting) has _______ zero(s) in decimal notation.

  • 3
  • 2
  • 1
  • none of the above

42. The network address in Class D (without subnetting) has _______ zero(s) in decimal notation

  • 3
  • 2
  • 1
  • none of the above

43. The natural mask for class A is _______________.

  • 255.255.255.0.
  • 255.255.0.0
  • 255.0.0.0
  • none of the above

44. The natural mask for class B is _______________.

  • 255.255.255.0.
  • 255.255.0.0
  • 255.0.0.0
  • none of the above

45. The natural mask for class C is _______________.

  • 255.255.255.0.
  • 255.255.0.0
  • 255.0.0.0
  • none of the above

46. The natural mask for class D is _______________.

  • 255.255.255.0.
  • 255.255.0.0
  • 255.0.0.0
  • none of the above

47. The natural mask for class E is _______________.

  • 255.255.255.0.
  • 255.255.0.0
  • 255.0.0.0
  • none of the above

48. Using a host address 195.21.43.65 and the mask 255.255.255.192, the subnetwork address is ___________

  • 195.21.43.0
  • 195.21.0.0.
  • 195.21.43.64
  • none of the above

49. Using a host address 140.78.3.45 and the mask 255.255.255.0, the subnetwork address is ___________.

  • 140.70.0.0
  • 140.78.3.0
  • 140.78.0.0
  • none of the above

50. Using a host address 112.8.13.145 and the mask 255.255.0.0, the subnetwork address is ___________.

  • 112.8.13.0
  • 112.8.0.0
  • 112.0.0.0
  • none of the above

51. IP addresses without subnetting have _________ level(s) of hierarchy.

  • 3
  • 2
  • 1
  • none of the above

52. IP addresses with subnetting have _________ level(s) of hierarchy.

  • 3
  • 2
  • 1
  • none of the above

53. Masking can be used only in _________ class(es).

  • 3
  • 2
  • 1
  • none of the above

54. Masking is not used in class(es) ___________.

  • A and B
  • B and C
  • C and D
  • D and E

55. The length of an IP header is _________ bytes.

  • 20
  • 20-40
  • 20-60
  • none of the above

56. If the value of HLEN in an IP packet is 0101, the header is _________ long.

  • 5
  • 20
  • 60
  • none of the above

57. If the value of HLEN in an IP packet is 1100, the option field is _________ long.

  • 28
  • 20
  • 40
  • none of the above

58. The field in the IP packet header that defines the number of hops a packet can travel before being dropped is called ___________.

  • flags
  • time to live
  • offset
  • none of the above

59. The protocol used to report a problem in the IP packet is called _______.

  • IGMP
  • ICMP
  • ARP
  • none of the above

60. The size of the header in the UDP packet is _________ bytes.

  • 8
  • 16
  • 4
  • none of the above

61. A source port address in UDP is only _________ byte(s).

  • 2
  • 1
  • 4
  • none of the above

62. A destination port address in UDP is only _________ byte(s).

  • 2
  • 1
  • 4
  • none of the above

63. A source or destination port address in UDP can define up to _______ ports.

  • 16
  • 48
  • 32
  • none of the above

64. The length of the TCP header without options is _______ bytes.

  • 40
  • 20
  • 60
  • none of the above

65. The length of the TCP header is _______ bytes.

  • 20-40
  • 20-60
  • 0-60
  • none of the above

66. The length of the TCP options is _______ bytes.

  • 20-40
  • 0-40
  • 0-60
  • none of the above

67. When the value of HLEN field in TCP is 5, there are_______ bytes of options.

  • 0
  • 20
  • 40
  • none of the above

68. The length of the sequence number field in TCP is _______ byte(s).

  • 1
  • 2
  • 4
  • none of the above

69. The length of the acknowledgment number field in TCP is _______ byte(s).

  • 1
  • 2
  • 4
  • none of the above

70. The length of the window size field in TCP is _______ byte(s).

  • 1
  • 2
  • 4
  • none of the above

71. The maximum value of the sequence number in TCP is _______.

  • 216 - 1
  • 224 - 1
  • 232 - 1
  • none of the above

72. The maximum value of the acknowledgment number in TCP is _______.

  • 216 - 1
  • 224 - 1
  • 232 - 1
  • none of the above

73. The maximum value of the window size in TCP is ___________.

  • 216 - 1
  • 224 - 1
  • 232 - 1
  • none of the above

74. The maximum value of the urgent pointer in TCP is ___________.

  • 216 - 1
  • 224 -1
  • 232-1
  • none of the above

Looking for more? Check out the below resources.

Data Communication and Networking MCQs by Behrouz A Forouzan
Computer Networking MCQs
Fundamentals of Networking Online Tests
Data Communication and Networking Online Tests
Data Communication and Networking Short Questions with Answers
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