On the network running STP, when the network topology changes, multiple topology change notifications are sent. How many types of RSTP TC BPDUs are defined?
A. One
B. Two
C. Three
D. Four
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On the network running STP, when the network topology changes, multiple topology change notifications are sent. How many types of RSTP TC BPDUs are defined?
A. One
B. Two
C. Three
D. Four
|
Download Printable PDF. VALID exam to help you PASS. |
|
Correct Answer is A
Few changes have been introduced by RSTP to the BPDU format. Only two flags, Topology Change (TC) and TC Acknowledgment (TCA), are defined in 802.1D. However, RSTP now uses all six bits of the flag byte
The BPDU is flags field is 8 bits (0 – 7)
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146.html
Flags Field
Bit 0 = TC
Bit 8 = TCA
So i would say B