Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 128
Q1801:
Which layer controls how the transmission medium is used?
A. Physical Layer
B. Data-Link Layer
C. Session Layer
D. Application Layer
Correct Answer:
B
Chapter: 128
Q1802:
The Data-Link Layer can use ______ of the transmission medium.
A. only a portion
B. the full capacity
C. both full and partial
D. cannot use
Correct Answer:
A
Chapter: 128
Q1803:
What are the two categories of links in a network?
A. Peer-to-peer and client-server
B. Point-to-point and broadcast
C. Star and Ring
D. Serial and Parallel
Correct Answer:
B
Chapter: 128
Q1804:
In a point-to-point link, communication occurs between ______.
A. All nodes
B. One sender and many receivers
C. Two nodes only
D. Multiple devices
Correct Answer:
C
Chapter: 128
Q1805:
A broadcast link allows data to be sent to ______.
A. One specific device
B. All connected devices
C. Only routers
D. Only servers
Correct Answer:
B
Chapter: 128
Q1806:
What is the main role of the Media Access Control (MAC) sublayer?
A. Error correction
B. Managing IP addresses
C. Controlling access to the medium
D. Data compression
Correct Answer:
C
Chapter: 128
Q1807:
The Data-Link Control (DLC) sublayer is responsible for ______.
A. access control
B. routing
C. table management
D. node-to-node communication
Correct Answer:
D
Chapter: 128
Q1808:
The Data-Link Layer is divided into which two sublayers?
A. MAC and IP
B. IP and TCP
C. DLC and MAC
D. DLC and TCP
Correct Answer:
C
Chapter: 128
Q1809:
Which sublayer is responsible for controlling how devices share the transmission medium?
A. MAC
B. DLC
C. Network
D. Transport
Correct Answer:
A
Chapter: 128
Q1810:
Which sublayer ensures reliable delivery between two directly connected nodes?
A. MAC
B. DLC
C. ARP
D. ICMP
Correct Answer:
B
Chapter: 128
Q1811:
Fill in the blank: The ______ sublayer of the Data-Link Layer is concerned with media sharing.
A. MAC
B. DLC
C. ARP
D. IP
Correct Answer:
A
Chapter: 128
Q1812:
Which of the following is a key function of the MAC sublayer?
A. IP Addressing
B. Media access control
C. Error control
D. Data segmentation
Correct Answer:
B
Chapter: 128
Q1813:
What type of link is typically used in home internet connections like DSL or Fiber?
A. Point-to-point
B. Broadcast
C. Mesh
D. Ring
Correct Answer:
A
Chapter: 128
Q1814:
In a broadcast link, when one node transmits, ______.
A. Only the router receives it
B. All other nodes receive it
C. No other node receives it
D. Only selected nodes receive it
Correct Answer:
B
Chapter: 128
Q1815:
What is a characteristic of the DLC sublayer?
A. Responsible for data encryption
B. Manages IP routing
C. Controls error detection and flow
D. Controls port number assignment
Correct Answer:
C
Chapter: 129
Q1816:
What is used as an identifier at the network layer?
A. MAC address
B. Port number
C. IP address
D. Host name
Correct Answer:
C
Chapter: 129
Q1817:
IP addresses are responsible for identifying ______ in a network.
A. Links
B. Nodes
C. Connections
D. Routers
Correct Answer:
B
Chapter: 129
Q1818:
Which of the following best describes the role of IP addresses?
A. They guide packets across all links
B. They define the start and end nodes
C. They encrypt data
D. They generate packets
Correct Answer:
B
Chapter: 129
Q1819:
Fill in the blank: In the Internet, we cannot make a packet reach its destination using only ______.
A. routing tables
B. IP addresses
C. DNS entries
D. Gateways
Correct Answer:
B
Chapter: 129
Q1820:
Which of the following is NOT defined by source and destination IP addresses?
A. Start point
B. End point
C. Transmission link
D. Path across networks
Correct Answer:
D