Please match the Cisco STP enahancement term to its definition.(Not all options will be used.)

(1) BPDU guard

(2) PortFast

(3) BackboneFast

(4) UplinkFast

(5) Loot guard

(a) shuts down a port that receives a BPDU when enabled

(b) cuts convergence time by mas-age for indirect failure

(c) prevents the aliernate or root port from being designated in absence of BPDUs

(d) causes Layer 2 LAN interface access port to immediately enter the forwarding state

(f) helps prevent bridging loops due to jni-directional link failures on point-to-point links

A.
(a)-(1);(b)-(2);(c)-(4);(d)-(5);(e)-(3)

B.
(a)-(4);(b)-(3);(c)-(2);(d)-(5);(e)-(1)

C.
(a)-(3);(b)-(2);(c)-(4);(d)-(5);(e)-(1)

D.
(a)-(1);(b)-(4);(c)-(3);(d)-(5);(e)-(2)

Explanation:

Cisco offers a variety of enhancements to STP:
1. PortFast: Allows an access port to bypass STPs listening and learning phases so no need to wait 50 seconds to forward data.
2. UplinkFast: Reduces STP convergence from 50 seconds to approximately 3 to 5 seconds so no need to wait 50 seconds to forward data through alternate link
3. BackboneFast: Reduces STP convergence time for an indirect link failure.
4. LoopGuard: Helps prevent loops that could occur because of a unidirectional link failure, a software failure, or a bridge protocol data unit (BPDU) loss due to congestion
5. RootGuard: Prevents an inappropriate switch from being elected as a root bridge
6. BPDUGuard: Causes a port configured for PortFast to go into the errordisable state if a BPDU is received on the port