Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Chapter: 9
Q341:
In a LAN, when a message is sent, it initially reaches ______.
A. Only the destination computer
B. Only the router
C. All attached stations
D. None of the above
Correct Answer:
C
Chapter: 9
Q342:
Each station on the network is assigned a unique ______.
A. Email ID
B. IP address
C. Hardware address
D. Domain name
Correct Answer:
C
Chapter: 9
Q343:
The LAN interface may use ______ to copy data from main memory.
A. ROM
B. EEPROM
C. DMA
D. BIOS
Correct Answer:
C
Chapter: 9
Q344:
A frame in a shared LAN is received by all, but only the ______ picks it.
A. Firewall
B. Router
C. Identified station
D. Server
Correct Answer:
C
Chapter: 9
Q345:
The length of a hardware address typically ranges from ______.
A. 1 to 2 bytes
B. 1 to 4 bytes
C. 1 to 6 bytes
D. 2 to 8 bytes
Correct Answer:
C
Chapter: 9
Q346:
Broadcast messages are identified by a ______ address.
A. Static
B. Configurable
C. Multicast
D. Broadcast
Correct Answer:
D
Chapter: 9
Q347:
Which category requires reliable mechanisms to avoid address conflicts?
A. Configurable
B. Static
C. Dynamic
D. Static and Dynamic
Correct Answer:
C
Chapter: 9
Q348:
The LAN interface is responsible for transmission and ______ of frames.
A. Storage
B. Decryption
C. Reception
D. Compilation
Correct Answer:
C
Chapter: 9
Q349:
Each frame includes ______ to help destination identify the sender.
A. Router ID
B. Port number
C. Hardware address
D. Frame ID
Correct Answer:
C
Chapter: 10
Q350:
What is a major drawback of broadcast frames on a network?
A. They reduce memory usage
B. They waste CPU time on all computers except the intended receiver
C. They increase network security
D. They improve system software efficiency
Correct Answer:
B
Chapter: 10
Q351:
Multicasting differs from broadcasting because it:
A. Forwards frames to all computers
B. Restricts frame forwarding to certain addresses
C. Discards all broadcast frames
D. Uses less memory than broadcasting
Correct Answer:
B
Chapter: 10
Q352:
Which frames does the interface hardware accept when programmed for multicasting?
A. Only unicast frames
B. Multicast frames, broadcast frames, and frames addressed to the station itself
C. Only broadcast frames
D. Only multicast frames
Correct Answer:
B
Chapter: 10
Q353:
Multicast addressing allows:
A. All computers to receive audio frames
B. Only computers running the audio application to receive audio frames
C. No computers to receive audio frames
D. Only computers with the highest CPU speed to receive frames
Correct Answer:
B
Chapter: 10
Q354:
In explicit frame type identification, the frame includes:
A. A value describing the type of data
B. Only data without any header
C. An implicit hint about the data type
D. No indication of data type
Correct Answer:
A
Chapter: 10
Q355:
Implicit frame type identification means:
A. The receiver infers the data type from the frame content
B. The frame has an explicit type field
C. The frame data is encrypted
D. No data type information is present
Correct Answer:
A
Chapter: 10
Q356:
What are the two main parts of a LAN frame?
A. Header and payload
B. Header and footer
C. Source address and destination address
D. CRC and preamble
Correct Answer:
A
Chapter: 10
Q357:
What is the purpose of the Ethernet frame preamble?
A. Identify the intended receiver
B. Synchronize the receiver
C. Carry the payload data
D. Provide error checking
Correct Answer:
B
Chapter: 10
Q358:
Which Ethernet field identifies the intended receiver?
A. Destination address
B. Source address
C. Frame type
D. CRC
Correct Answer:
A
Chapter: 10
Q359:
The CRC field in an Ethernet frame is used for:
A. Error detection
B. Data payload
C. Receiver synchronization
D. Sender address
Correct Answer:
A
Chapter: 10
Q360:
In LANs without a type field, data format is usually:
A. Encoded in the first few bytes of the data
B. Not used
C. Encoded in the CRC
D. Encoded in the preamble
Correct Answer:
A