Network Model MCQs - Data Communication and Networking

This section focused on Data Communication and Networking – Network Model MCQ (Multiple Choice) type Questions and Answers.

All the Multiple Choice Question and Answer (MCQs) have been compiled from the books of Data Communication and Networking by The well known author behrouz forouzan.

This Section covers below lists of topics.

Networking protocols MCQs.
Network Models MCQs.
Application layer MCQs.
Transport layer MCQs.
Physical layer MCQs.
Data link layer MCQs.
Network layer MCQs.

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

1. Why was the OSI model developed?

Manufacturers disliked the TCP/IP protocol suite
The rate of data transfer was increasing exponentially
Standards were needed to allow any two systems to communicate
None of the above

2. The _______ model shows how the network functions of a computer ought to be organized.

CCITT
OSI
ISO
ANSI

3. The physical layer is concerned with the movement of _______ over the physical medium.

programs
dialogs
protocols
bits

4. The OSI model consists of _______ layers.

three
five
seven
eight

5. In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______.

added
removed
rearranged
modified

6. In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's _______ layer.

physical
transport
session
presentation

7. In the OSI model, what is the main function of the transport layer?

node-to-node delivery
process-to-process message delivery
synchronization
updating and maintenance of routing tables

8. In the OSI model, encryption and decryption are functions of the ________ layer.

transport
session
presentation
application

9. When a host on network A sends a message to a host on network B, which address does the router look at?

port
logical
physical
none of the above

10. To deliver a message to the correct application program running on a host, the _______ address must be consulted.

port
IP
physical
none of the above

11. IPv6 has _______ -bit addresses.

32
64
128
variable

12. ICMPv6 includes _______

IGMP
ARP
RARP
a and b

13. The ______ layer is responsible for moving frames from one hop (node) to the next.

physical
data link
transport
none of the above

14. The ______ layer adds a header to the packet coming from the upper layer that includes the logical addresses of the sender and receiver.

physical
data link
network
none of the above

15. The_________ layer is responsible for the delivery of a message from one process to another.

physical
transport
network
none of the above

16. The Internetworking Protocol (IP) is a ________ protocol

reliable
connection-oriented
both a and b
none of the above

17. ______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.

TCP
UDP
IP
none of the above

18. _________ provides full transport layer services to applications.

TCP
UDP
ARP
none of the above

19. The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN

port
physical
logical
none of the above

20. Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC)

32-bit
64-bit
6-byte
none of the above

21. A port address in TCP/IP is ______ bits long.

32
48
16
none of the above

22. The ____ created a model called the Open Systems Interconnection, which allows diverse systems to communicate.

OSI
ISO
IEEE
D. none of the above

23. The seven-layer _____ model provides guidelines for the development of universally compatible networking protocols.

OSI
ISO
IEEE
none of the above

24. The physical, data link, and network layers are the ______ support layers.

user
network
both (a) and (b)
neither (a) nor (b)

25. The session, presentation, and application layers are the ____ support layers.

user
network
both (a) and (b)
neither (a) nor (b)

26. The _______ layer links the network support layers and the user support layers.

transport
network
data link
session

27. The _______ layer coordinates the functions required to transmit a bit stream over a physical medium.

transport
network
data link
physical

28. The _______ layer is responsible for delivering data units from one station to the next without errors.

transport
network
data link
physical

29. The ______ layer is responsible for the source-to-destination delivery of a packet across multiple network links.

transport
network
data link
physical

30. The ________ layer is responsible for the process-to-process delivery of the entire message.

transport
network
data link
physical

31. The ______ layer establishes, maintains, and synchronizes the interactions between communicating devices

transport
network
session
physical

32. The _______ layer ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format.

transport
network
data link
presentation

33. The _________ layer enables the users to access the network

transport
application
data link
physical

34. TCP/IP is a __ hierarchical protocol suite developed the OSI model.

seven-layer; before
five-layer; before
six-layer; before
five-layer; after

35. The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model

application
network
data link
physical

36. The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN

physical
IP
port
specific

37. The ____ address uniquely defines a host on the Internet

physical
IP
port
specific

38. The_____ address identifies a process on a host

physical
IP
port
specific

39. The Internet model consists of _______ layers.

Three
Five
Seven
Eight

40. The process-to-process delivery of the entire message is the responsibility of the _______ layer.

Network
Transport
Application
Physical

41. The _______ layer is the layer closest to the transmission medium.

Physical
Data link
Network
Transport

42. Mail services are available to network users through the _______ layer.

Data link
Physical
Transport
Application

43. As the data packet moves from the upper to the lower layers, headers are _______.

Added
Removed
Rearranged
Modified

44. The _______ layer lies between the network layer and the application layer.

Physical
Data link
Transport
None of the above

45. Layer 2 lies between the physical layer and the _______ layer.

Network
Data link
Transport
None of the above

46. When data are transmitted from device A to device B, the header from A's layer 4 is read by B's _______ layer.

Physical
Transport
Application
None of the above

47. The _______ layer changes bits into electromagnetic signals.

Physical
Data link
Transport
None of the above

48. Which of the following is an application layer service?

Remote log-in
File transfer and access
Mail service
All the above

Data Communication and Networking – Network Model MCQs