Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 129
Q1821:
To fully define the path a packet must take, what additional information is needed besides IP addresses?
A. Gateway IPs
B. Link layer addresses
C. Port numbers
D. All of the above
Correct Answer:
D
Chapter: 129
Q1822:
Why can't IP addresses alone determine the packet's path?
A. They are encrypted
B. They lack physical path info
C. They are too long
D. They are unique globally
Correct Answer:
B
Chapter: 129
Q1823:
Fill in the blank: ______ are used to identify devices on different networks.
A. MAC addresses
B. Subnet masks
C. IP addresses
D. DNS records
Correct Answer:
C
Chapter: 129
Q1824:
Which layer uses IP addresses for communication?
A. Application layer
B. Network layer
C. Session layer
D. Data-link layer
Correct Answer:
B
Chapter: 129
Q1825:
What do source and destination IP addresses represent?
A. Intermediate nodes
B. Entry and exit routers
C. The ends of the communication
D. The encryption keys
Correct Answer:
C
Chapter: 130
Q1826:
Which layer uses IP addresses as identifiers?
A. Application layer
B. Transport layer
C. Network layer
D. Data-link layer
Correct Answer:
C
Chapter: 130
Q1827:
IP addresses are assigned to ______.
A. Applications
B. Switches
C. Network interfaces
D. Ports
Correct Answer:
C
Chapter: 130
Q1828:
Fill in the blank: In the Internet, routing decisions depend on ______, not only IP addresses.
A. Protocols
B. Links
C. IP headers
D. Routing tables
Correct Answer:
D
Chapter: 130
Q1829:
Which of the following is not sufficient to route a packet across networks?
A. IP address
B. Link state
C. Forwarding table
D. Routing algorithm
Correct Answer:
A
Chapter: 130
Q1830:
What role do IP addresses play in packet transmission?
A. Determine link type
B. Define source and destination
C. Encrypt data
D. Measure delay
Correct Answer:
B
Chapter: 130
Q1831:
Fill in the blank: ______ are used to determine the next hop in the packet path.
A. DNS addresses
B. MAC addresses
C. IP headers
D. Routing protocols
Correct Answer:
D
Chapter: 130
Q1832:
The process of choosing the path a packet takes is called ______.
A. Framing
B. Modulation
C. Routing
D. Error detection
Correct Answer:
C
Chapter: 130
Q1833:
IP addresses are part of which header in a packet?
A. Data-link header
B. Transport header
C. IP header
D. Application header
Correct Answer:
C
Chapter: 130
Q1834:
Which of the following defines the ends of a communication in a network?
A. IP addresses
B. MAC addresses
C. Gateway addresses
D. Port numbers
Correct Answer:
A
Chapter: 130
Q1835:
Fill in the blank: The ______ contains both source and destination IP addresses.
A. Frame
B. Segment
C. Packet
D. Header
Correct Answer:
C
Chapter: 130
Q1836:
Why can't IP addresses alone determine the transmission path?
A. They are outdated
B. They lack routing info
C. They are dynamic
D. They are not encrypted
Correct Answer:
B
Chapter: 131
Q1837:
How many bits are used in Ethernet link-layer addresses?
A. 32
B. 48
C. 64
D. 128
Correct Answer:
B
Chapter: 131
Q1838:
Which of the following is a unicast link-layer address format?
A. All 0s
B. All 1s
C. Second digit even
D. Second digit odd
Correct Answer:
D
Chapter: 131
Q1839:
What is the identifying characteristic of a multicast link-layer address in Ethernet?
A. All 0s
B. Second digit odd
C. Second digit even
D. All 1s
Correct Answer:
C
Chapter: 131
Q1840:
The second digit of an Ethernet multicast address must be:
A. Odd
B. Even
D. 1
Correct Answer:
B