Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Chapter: 19
Q641:
In ATM, what does QoS stand for?
A. Quality of Signals
B. Quantity of Services
C. Quality of Service
D. Queue of Sockets
Correct Answer:
C
Chapter: 19
Q642:
A typical voice call requires a throughput of ________.
A. 64 kbps
B. 2 Mbps
C. 1 Gbps
D. 512 kbps
Correct Answer:
A
Chapter: 19
Q643:
Which QoS type is suitable for audio and video with fixed rates?
A. VBR
B. CBR
C. ABR
D. SBR
Correct Answer:
B
Chapter: 19
Q644:
Which QoS type is best for compressed audio and video?
A. CBR
B. ABR
C. VBR
D. VCR
Correct Answer:
C
Chapter: 19
Q645:
Which QoS type is appropriate for bursty data applications?
A. ABR
B. VBR
C. CBR
D. UBR
Correct Answer:
A
Chapter: 19
Q646:
ATM switches communicate to choose appropriate ________ during connection setup.
A. Paths
B. Addresses
C. VPI/VCI
D. Port numbers
Correct Answer:
C
Chapter: 19
Q647:
The ATM forwarding table is indexed using ________.
A. Port number
B. Header size
C. VPI/VCI
D. Cell type
Correct Answer:
C
Chapter: 19
Q648:
Cells arriving at a switch are sent out via ________.
A. Input ports
B. Output ports
C. Random paths
D. Virtual routers
Correct Answer:
B
Chapter: 19
Q649:
ATM switches must have ________ forwarding tables to form a meaningful path.
A. Independent
B. Coordinated
C. Static
D. Dynamic
Correct Answer:
B
Chapter: 19
Q650:
If a destination rejects an SVC setup, an ________ is sent back.
A. ACK
B. Error message
C. Termination request
D. Connection packet
Correct Answer:
B
Chapter: 19
Q651:
Signaling messages in ATM are sent using ________.
A. Packets
B. Cells
C. Frames
D. Segments
Correct Answer:
B
Chapter: 19
Q652:
Which table does Switch B use when receiving a VPI/VCI of 4?
A. Transmission table
B. Forwarding table
C. Encoding table
D. Encryption table
Correct Answer:
B
Chapter: 19
Q653:
ATM connection setup involves communication between ________.
A. Ports only
B. Computers only
C. Switch pairs
D. Switch to router
Correct Answer:
C
Chapter: 19
Q654:
Which of the following is TRUE about signaling in ATM?
A. It uses normal data cells
B. It uses reserved VPI/VCI
C. It bypasses the switch
D. It encrypts headers
Correct Answer:
B
Chapter: 19
Q655:
ATM is used to create virtual connections using ________.
A. Ethernet
B. IP routing
C. VCI/VPI
D. MAC addressing
Correct Answer:
C
Chapter: 19
Q656:
Label switching systems like ATM use ________ rewriting.
A. VPI/VCI
B. MAC/IP
C. Path/Port
D. Route/Header
Correct Answer:
A
Chapter: 20
Q657:
Why did ATM designers choose fixed-length cells over variable-length packets?
A. To simplify hardware
B. To reduce costs
C. To increase variability
D. To promote LAN use
Correct Answer:
A
Chapter: 20
Q658:
Which of the following leads to memory fragmentation in networks?
A. Fixed-length cells
B. Short packets
C. Variable-length packets
D. Header compression
Correct Answer:
C
Chapter: 20
Q659:
What is a disadvantage of using variable-length packets?
A. Simple memory handling
B. Easy interrupt management
C. Better QoS
D. Complex hardware needed to detect packet ends
Correct Answer:
D
Chapter: 20
Q660:
ATM ensures better QoS by using
A. Variable-length packets
B. Fixed-length cells
C. Packet delay
D. Interrupts
Correct Answer:
B