Which STP protection feature should you use to prevent an inadvertent change in topology caused
by the receipt of a superior BPDU on an access interface?
A.
BPDU protection
B.
loop protection
C.
root protection
D.
topology protection
Which STP protection feature should you use to prevent an inadvertent change in topology caused by the receipt of a superior BPDU on an access interface?
Which STP protection feature should you use to prevent an inadvertent change in topology caused
by the receipt of a superior BPDU on an access interface?
imho right answer “A”
http://www.juniper.net/techpubs/en_US/junos16.1/topics/concept/spanning-trees-bpdu-protection-understanding-ex-series.html
To protect the state of spanning-tree protocols on switches from outside BPDUs, enable BPDU protection on the interfaces of a switch on which spanning-tree protocols are configured and are connected to user devices (such as PCs)—for example, on edge ports connected to PCs.
i think you are correct in that BDPU protection will drops BPDUs received; however, it is used on edge ports. in this question the question is referring to preventing a port on the root switch transitioning to a forwarding state where another switch takes over root, think adding a new switch to the network thats already got a configuration and takes over root.
http://www.juniper.net/techpubs/en_US/junos15.1/topics/example/spanning-trees-root-protection-ex-series.html
it is used on edge ports. in this question the question is referring to preventing a port on the root switch transitioning to a forwarding state where another switch takes over root, think adding a new switch to the network thats already got a configuration and takes over root.