Routing and Switching MCQs with Answers
Practice important Routing and Switching MCQs with answers and explanations.
Chapter: 160
Q1841:
Fill in the blank: The default value for the Forward Delay field in a BPDU frame is _______ seconds for each state.
A. 4
B. 10
C. 15
D. 20
Correct Answer:
C
Chapter: 160
Q1842:
What is the purpose of the Topology Change Acknowledgment (TCA) bit in a BPDU frame?
A. To acknowledge receipt of a configuration message with the TC bit set
B. To signal a topology change in the network
C. To indicate the root bridge ID
D. To define the message type
Correct Answer:
A
Chapter: 160
Q1843:
Fill in the blank: The default Max Age value for a BPDU frame is _______ seconds.
A. 6
B. 15
C. 20
D. 40
Correct Answer:
C
Chapter: 160
Q1844:
What field in a BPDU frame helps detect and correct loops created by multiple attached bridges?
A. Port ID
B. Root ID
C. Cost of path
D. Message Age
Correct Answer:
A
Chapter: 161
Q1845:
By default, how often are BPDU frames sent after a switch is booted?
A. Every 1 second
B. Every 2 seconds
C. Every 5 seconds
D. Every 10 seconds
Correct Answer:
B
Chapter: 161
Q1846:
Fill in the blank: If the root ID in a received BPDU is _______ than the local root ID, the switch updates its local root ID.
A. higher
B. lower
C. equal
D. unavailable
Correct Answer:
B
Chapter: 161
Q1847:
What does the path cost update in a BPDU frame indicate?
A. The distance from the switch to the root bridge
B. The time since the last BPDU frame was sent
C. The number of ports on the switch
D. The MAC address of the root bridge
Correct Answer:
A
Chapter: 161
Q1848:
Fill in the blank: After a root ID update, all subsequent BPDU frames from a switch contain the new _______ and updated path cost.
A. path cost
B. root ID
C. priority
D. MAC address
Correct Answer:
B
Chapter: 161
Q1849:
What field in a BPDU frame helps determine the root bridge based on the lowest value?
A. Bridge Priority
B. Extended System ID
C. MAC Address
D. Path Cost
Correct Answer:
C
Chapter: 161
Q1850:
Fill in the blank: The extended system ID in a BPDU frame is used to include _______ information.
A. VLAN
B. switch
C. MAC address
D. root bridge
Correct Answer:
A
Chapter: 161
Q1851:
What is the range of valid bridge priority values in increments of 4096?
A. 0 to 61440
B. 0 to 32768
C. 1 to 49152
D. 0 to 4096
Correct Answer:
A
Chapter: 161
Q1852:
Fill in the blank: To ensure a specific switch becomes the root bridge, set its priority to a _______ value than other switches.
A. higher
B. lower
C. equal
D. default
Correct Answer:
B
Chapter: 161
Q1853:
What does the Extended System ID field in the BPDU frame include?
A. VLAN ID
B. MAC address
C. Path Cost
D. Bridge Priority
Correct Answer:
A
Chapter: 161
Q1854:
Fill in the blank: The BID field of a BPDU frame contains bridge priority, extended system ID, and _______.
A. VLAN ID
B. MAC address
C. Path Cost
D. Port ID
Correct Answer:
B
Chapter: 161
Q1855:
When a switch has a lower priority value in its root ID, it will _______ the BPDU frame from a switch with a higher priority value.
A. accept
B. discard
C. forward
D. modify
Correct Answer:
B
Chapter: 161
Q1856:
Fill in the blank: The switch with the lowest _______ value becomes the root bridge when priorities are equal.
A. MAC address
B. path cost
C. VLAN ID
D. bridge priority
Correct Answer:
A
Chapter: 162
Q1857:
Which protocol is the original IEEE 802.1D version that provides a loop-free topology?
A. STP
B. PVST+
C. RSTP
D. MSTP
Correct Answer:
A
Chapter: 162
Q1858:
Fill in the blank: Rapid PVST+ is a Cisco enhancement of _______ that uses PVST+.
A. RSTP
B. STP
C. MSTP
D. 802.1D
Correct Answer:
A
Chapter: 162
Q1859:
What does MSTP map multiple VLANs into?
A. Separate spanning tree instances
B. A single spanning tree instance
C. Different physical topologies
D. Different logical topologies
Correct Answer:
B
Chapter: 162
Q1860:
Fill in the blank: The Cisco implementation of MSTP is known as _______.
A. MST
B. PVST+
C. RSTP
D. STP
Correct Answer:
A