Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q3431: Which of the following ports forwards data after the spanning tree is formed?
- A: Root port
- B: Blocked port
- C: Forwarding port
- D: Loop port
View Answer
C
Q3432: What kind of network issue does the spanning tree help avoid?
- A: Data duplication
- B: Address collision
- C: Network loops
- D: Low bandwidth
View Answer
C
Q3433: At which layers does a router operate?
- A: Only physical layer
- B: Physical and data-link layer
- C: Only network layer
- D: Physical, data-link, and network layers
View Answer
D
Q3434: Fill in the blank: A router is considered a ______ device.
- A: two-layer
- B: one-layer
- C: three-layer
- D: four-layer
View Answer
C
Q3435: What type of address does a router have for each interface?
- A: MAC address only
- B: IP address only
- C: Broadcast address
- D: Physical and logical address
View Answer
D
Q3436: Which device modifies both source and destination link-layer addresses when forwarding packets?
- A: Switch
- B: Router
- C: Repeater
- D: Hub
View Answer
B
Q3437: What does a router check before acting on a packet?
- A: Only IP address
- B: Only port number
- C: If link-layer destination matches its interface address
- D: If source IP is allowed
View Answer
C
Q3438: Fill in the blank: Routers act only on packets where the ______ matches the receiving interface.
- A: IP address
- B: link-layer destination
- C: address length
- D: frame length
View Answer
B
Q3439: What is a VLAN primarily configured by?
- A: Hardware switch
- B: Router table
- C: Physical wiring
- D: Software
View Answer
D
Q3440: Fill in the blank: VLAN stands for ______.
- A: Virtual Local Access Network
- B: Virtual Logical Area Network
- C: Virtual LAN
- D: Virtual Line Addressing
View Answer
C