Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Chapter: 13
Q461:
LAN signal strength decreases because ________.
A. bandwidth increases
B. cable cost drops
C. copper wires weaken signals
D. signal type changes
Correct Answer:
C
Chapter: 13
Q462:
A bridge only forwards frames when ________.
A. the source is unknown
B. the frame is error-free
C. it receives power
D. it is configured manually
Correct Answer:
B
Chapter: 13
Q463:
LAN extension using fiber modem can cover distance of ________.
A. 100 meters
B. 1 kilometer
C. several kilometers
D. only same building
Correct Answer:
C
Chapter: 13
Q464:
Ethernet standard allows a maximum of ________ repeaters between two stations.
A. 2
B. 3
C. 4
D. 6
Correct Answer:
C
Chapter: 14
Q465:
What state is a bridge in when it has no address list at boot time?
A. Start state
B. Steady state
C. Stable state
D. Transit state
Correct Answer:
A
Chapter: 14
Q466:
In steady state, a bridge can ______.
A. ignore all traffic
B. block all frames
C. allow simultaneous segment use
D. forward all traffic blindly
Correct Answer:
C
Chapter: 14
Q467:
Why do we install bridges in LAN design?
A. To increase delay
B. To divide LAN and improve performance
C. To replace routers
D. To remove switches
Correct Answer:
B
Chapter: 14
Q468:
When two computers frequently contact each other, they should be placed on the ______ segment.
A. same
B. different
C. bridge
D. dedicated
Correct Answer:
A
Chapter: 14
Q469:
A pair of fiber modems and optical fiber can connect LANs located in ______.
A. the same rack
B. separate buildings
C. single system
D. private clouds
Correct Answer:
B
Chapter: 14
Q470:
One advantage of using bridges between buildings is ______.
A. low cost of wireless
B. extensive rewiring
C. required maintenance is high
D. traffic on one building doesn’t affect the other
Correct Answer:
D
Chapter: 14
Q471:
What is NOT an advantage of bridging between buildings?
A. Less maintenance
B. Improved performance
C. No wiring changes required
D. High delay due to collisions
Correct Answer:
D
Chapter: 14
Q472:
Which component is NOT required when bridging between two buildings?
A. Bridge
B. Fiber modem
C. Router
D. Optical fiber
Correct Answer:
C
Chapter: 14
Q473:
Why is it sometimes not possible to use optical fiber between two distant buildings?
A. Fiber cannot handle digital signals
B. It is expensive
C. The land may not belong to you
D. Fiber modems are unreliable
Correct Answer:
C
Chapter: 14
Q474:
What are two common alternatives to connect distant sites?
A. DSL and ISDN
B. WiFi and 5G
C. Leased line and satellite
D. Radio and Bluetooth
Correct Answer:
C
Chapter: 14
Q475:
Which connection spans arbitrarily long distances?
A. Ethernet cable
B. Leased serial line
C. Leased satellite channel
D. Fiber optics
Correct Answer:
C
Chapter: 14
Q476:
What is a limitation of satellite communication links?
A. Very high bandwidth
B. Very low cost
C. Frames arrive faster than they can be sent
D. No need for buffering
Correct Answer:
C
Chapter: 14
Q477:
How do bridges manage the delay in satellite communication?
A. They ignore some frames
B. They compress the data
C. They use buffering
D. They reject packets
Correct Answer:
C
Chapter: 14
Q478:
What may happen if the bridge runs out of memory during buffering?
A. It shuts down
B. It drops the connection
C. It drops incoming frames
D. It sends all frames again
Correct Answer:
C
Chapter: 14
Q479:
What does the communication software do after sending a few frames?
A. Stops transmission
B. Waits for a response
C. Reboots the system
D. Erases memory
Correct Answer:
B
Chapter: 14
Q480:
A bridge network can connect ______.
A. only two LANs
B. only switches
C. many segments
D. many routers
Correct Answer:
C