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.
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