Chapter 3: Advanced STP Tuning

Question 1

BPDU Filter

Answer 1

An STP feature that filters BPDU’s from being advertised/received across the configured port

Question 2

BPDU guard

Answer 2

An STP feature that places a port into an ErrDisabled state if a BPDU is received on a portfast-enabled port

Question 3

root guard

Answer 3

An STP feature that places a port into an ErrDisabled state if a superior BPDU is received on the configured port

Question 4

STP portfast

Answer 4

An STP feature that places a switch port directly into a forwarding state and disables TCN generation for a change in link state

Question 5

STP Loop Guard

Answer 5

An STP feature that prevents a configured alternative or root port from becoming a designated port toward a downstream switch

Question 6

UDLD

Answer 6

Unidirectional Link Detection, a protocol that provides bidirectional monitoring of fiber-optic cables