The correct answer is B. PortFast.
PortFast is a feature in the Spanning Tree Protocol (STP) that is used to quickly transition a port from the blocking state to the forwarding state. This feature is typically used for access ports that connect to end devices (such as PCs or servers), which do not generate Spanning Tree Protocol (BPDUs) messages. By using PortFast, the STP learning and listening states are skipped and the port is immediately placed into the forwarding state, reducing the amount of time it takes for the port to transition from a blocking to a forwarding state.
A. BPDUfilter: This feature disables the processing of received BPDUs on a port, but it does not change the operation of the Spanning Tree Protocol.
C. Backbonefast: This feature is used to quickly detect and recover from indirect failures in the network, but it does not change the operation of the Spanning Tree Protocol on individual ports.
D. BPDUguard: This feature helps to prevent unauthorized switches from being connected to the network by disabling a port if it receives a BPDU message. This can help to prevent unauthorized switches from affecting the operation of the Spanning Tree Protocol.
PortFast: allows the port to go straight to a forwarding state because there is no danger of a loop.
BPDU Guard: If an interface with this enabled receives BPDU from another switch, the interface will be shut down to prevent a loop from forming.
Root Guard*: even if it receives a superior BPDU (lower bridge ID) on that interface, the switch will not accept the new switch as the root bridge. The interface will be disabled.
Loop Guard*: even if the interface stops receiving BPDUs, it will not start forwarding. The interface will be disabled.
* = not mentioned in objectives.
Spanning Tree Portfast causes layer 2 switch interfaces to enter forwarding state immediately,
bypassing the listening and learning states. It should be used on ports connected directly to end hosts
like servers or workstations. Note: If portfast isn’t enabled, DHCP timeouts can occur while STP
converges, causing more problems.
This section is not available anymore. Please use the main Exam Page.200-301 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
Alsaher
Highly Voted 2 years, 7 months agoricky1802
Most Recent 10 months, 1 week agoricky1802
10 months, 1 week agoCustomexit
1 year, 1 month agoZUMY
1 year, 5 months agoNebulise
1 year, 10 months agonetlol
1 year, 10 months agoPamirt
2 years, 4 months ago