Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. The ______ layer adds a header to the packet coming from the upper layer that includes the logical addresses of the sender and receiver.
A) data link
B) network
C) physical
D) none of the above
Answer: Option B
2. Which of the following is an application layer service?
A) File transfer and access
B) Mail service
C) Remote log-in
D) All the above
Answer: Option D
3. When data are transmitted from device A to device B, the header from A’s layer 4 is read by B’s _______ layer.
A) Transport
B) Application
C) Physical
D) None of the above
Answer: Option A
4. __________ provides full transport layer services to applications.
A) UDP
B) TCP
C) ARP
D) none of the above
Answer: Option B
5. The process-to-process delivery of the entire message is the responsibility of the _______ layer.
A) Transport
B) Application
C) Physical
D) Network
Answer: Option A
6. The ______ layer is responsible for moving frames from one hop (node) to the next.
A) transport
B) data link
C) physical
D) none of the above
Answer: Option B
7. The _______ layer is responsible for delivering data units from one station to the next without errors.
A) physical
B) data link
C) transport
D) network
Answer: Option B
8. The session, presentation, and application layers are the ______ support layers.
A) user
B) network
C) both (a) and (b)
D) neither (a) nor (b)
Answer: Option A
9. The physical, data link, and network layers are the ______ support layers.
A) network
B) user
C) both (a) and (b)
D) neither (a) nor (b)
Answer: Option A
10. The ________ layer is responsible for the process-to-process delivery of the entire message.
A) transport
B) physical
C) network
D) data link
Answer: Option A
11. The _______ layer lies between the network layer and the application layer.
A) Data link
B) Transport
C) Physical
D) None of the above
Answer: Option B
12. The Internetworking Protocol (IP) is a ________ protocol.
A) connection-oriented
B) reliable
C) both a and b
D) none of the above
Answer: Option D
13. The _______ layer links the network support layers and the user support layers.
A) session
B) transport
C) data link
D) network
Answer: Option B
14. ICMPv6 includes _______.
A) IGMP
B) ARP
C) RARP
D) a and b
Answer: Option D
15. The ____ address uniquely defines a host on the Internet.
A) IP
B) port
C) specific
D) physical
Answer: Option A
16. The _______ layer coordinates the functions required to transmit a bit stream over a physical medium.
A) data link
B) transport
C) network
D) physical
Answer: Option D
17. The ______ layer is responsible for the source-to-destination delivery of a packet across multiple network links.
A) network
B) physical
C) data link
D) transport
Answer: Option A
18. Mail services are available to network users through the _______ layer.
A) Transport
B) Physical
C) Data link
D) Application
Answer: Option D
19. The ____ created a model called the Open Systems Interconnection, which allows diverse systems to communicate.
A) IEEE
B) ISO
C) OSI
D) none of the above
Answer: Option B
20. The _______ layer changes bits into electromagnetic signals.
A) Physical
B) Transport
C) Data link
D) None of the above
Answer: Option A
21. IPv6 has _______ -bit addresses.
A) 128
B) 32
C) 64
D) variable
Answer: Option A
22. The_____ address identifies a process on a host.
A) specific
B) port
C) IP
D) physical
Answer: Option B
23. The_________ layer is responsible for the delivery of a message from one process to another.
A) transport
B) network
C) physical
D) none of the above
Answer: Option A
24. The _________ layer enables the users to access the network.
A) application
B) physical
C) data link
D) transport
Answer: Option A
25. The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model.
A) data link
B) network
C) physical
D) application
Answer: Option D
26. When a host on network A sends a message to a host on network B, which address does the router look at?
A) logical
B) physical
C) port
D) none of the above
Answer: Option A
27. As the data packet moves from the upper to the lower layers, headers are _______.
A) Rearranged
B) Removed
C) Added
D) Modified
Answer: Option C
28. The physical layer is concerned with the movement of _______ over the physical medium.
A) dialogs
B) protocols
C) bits
D) programs
Answer: Option C
29. To deliver a message to the correct application program running on a host, the _______ address must be consulted.
A) physical
B) port
C) IP
D) none of the above
Answer: Option B
30. Ethernet uses a ________ physical address that is imprinted on the network interface card (NIC).
A) 32-bit
B) 6-byte
C) 64-bit
D) none of the above
Answer: Option B
31. The _______ layer is the layer closest to the transmission medium.
A) Network
B) Transport
C) Physical
D) Data link
Answer: Option C
32. The OSI model consists of _______ layers.
A) eight
B) seven
C) five
D) three
Answer: Option B
33. The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN.
A) IP
B) port
C) specific
D) physical
Answer: Option D
34. Layer 2 lies between the physical layer and the _______ layer.
A) Data link
B) Transport
C) Network
D) None of the above
Answer: Option C
35. Why was the OSI model developed?
A) The rate of data transfer was increasing exponentially
B) Standards were needed to allow any two systems to communicate
C) Manufacturers disliked the TCP/IP protocol suite.
D) None of the above
Answer: Option B
36. In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______.
A) removed
B) added
C) rearranged
D) modified
Answer: Option A
37. 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.
A) session
B) physical
C) transport
D) presentation
Answer: Option A
38. The seven-layer _______ model provides guidelines for the development of universally compatible networking protocols.
A) ISO
B) OSI
C) IEEE
D) none of the above
Answer: Option B
39. The Internet model consists of _______ layers.
A) Eight
B) Seven
C) Five
D) Three
Answer: Option C
40. In the OSI model, what is the main function of the transport layer?
A) process-to-process message delivery
B) node-to-node delivery
C) synchronization
D) updating and maintenance of routing tables
Answer: Option A
41. _______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.
A) IP
B) TCP
C) UDP
D) none of the above
Answer: Option C
42. The ______ layer establishes, maintains, and synchronizes the interactions between communicating devices.
A) session
B) physical
C) transport
D) network
Answer: Option A
43. A port address in TCP/IP is ______ bits long.
A) 16
B) 32
C) 48
D) none of the above
Answer: Option A
44. In the OSI model, encryption and decryption are functions of the ________ layer.
A) application
B) presentation
C) session
D) transport
Answer: Option B
45. TCP/IP is a ______ hierarchical protocol suite developed ____ the OSI model.
A) five-layer; before
B) six-layer; before
C) seven-layer; before
D) five-layer; after
Answer: Option A
46. The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN.
A) logical
B) port
C) physical
D) none of the above
Answer: Option C
47. The _______ model shows how the network functions of a computer ought to be organized.
A) ANSI
B) CCITT
C) ISO
D) OSI
Answer: Option D
48. The _______ layer ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format.
A) network
B) presentation
C) transport
D) data link
Answer: Option B