Practice Exam Test Questions
Choose the letter of the best answer in each questions.
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
Solution:
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
Solution:
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
Solution:
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
Solution:
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
Solution:
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
Solution:
31. The _______ layer is the layer closest to the transmission medium.
A) Network
B) Transport
C) Physical
D) Data link
Answer: Option C
Solution:
32. The OSI model consists of _______ layers.
A) eight
B) seven
C) five
D) three
Answer: Option B
Solution:
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
Solution:
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
Solution:
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
Solution:
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
Solution:
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
Solution:
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
Solution:
39. The Internet model consists of _______ layers.
A) Eight
B) Seven
C) Five
D) Three
Answer: Option C
Solution:
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
Solution:
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
Solution:
42. The ______ layer establishes, maintains, and synchronizes the interactions between communicating devices.
A) session
B) physical
C) transport
D) network
Answer: Option A
Solution:
43. A port address in TCP/IP is ______ bits long.
A) 16
B) 32
C) 48
D) none of the above
Answer: Option A
Solution:
44. In the OSI model, encryption and decryption are functions of the ________ layer.
A) application
B) presentation
C) session
D) transport
Answer: Option B
Solution:
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
Solution:
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
Solution:
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
Solution:
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
Solution:
NEXT: MCQ in Data and Signals
Complete List of Chapter Quiz in Data Communications and Networking
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MCQ in Network Models (pdf)
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