Please match the Cisco STP enahancement term to its definition

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) Root 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 alternate or root port from being designated in absence of BPDUs
(d) causes Layer 2 LAN interface access port to immediately enter the forwarding state (e) helps prevent bridging loops due to uni-directional link failures on point-to-point links

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) Root 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 alternate or root port from being designated in absence of BPDUs
(d) causes Layer 2 LAN interface access port to immediately enter the forwarding state (e) helps prevent bridging loops due to uni-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:
BPDU guard – shuts down a port that receives a BPDU when enabled
PortFast – helps prevent bridging loops due to uni-directional link failures on point-to-point links
BackboneFast – the alternate or root port from being designated in absence of BPDUs
UplinkFast – cuts convergence time by mas-age for indirect failure
Root guard – causes Layer 2 LAN interface access port to immediately enter the forwarding state



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