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QUESTION 75
Refer to the exhibit and the partial configuration of switch SW_A and SW_B. STP is configured on all switches in the network. SW_B receives this error message on the console port:
00:06:34:
%CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on FastEthernet0/5 (not half
duplex),
with SW_A FastEthernet0/4 (half duplex) ,
with TBA05071417(Cat6K-B) 0/4 (half duplex).
What would be the possible outcome of the problem?
A.
The root port on switch SW_A will automatically transition to full-duplex mode.
B.
The root port on switch SW_B will fallback to full-duplex mode.
C.
The interfaces between switches SW_A and SW_B will transition to a blocking state.
D.
Interface Fa 0/6 on switch SW_B will transition to a forwarding state and create a bridging loop.
Correct Answer: D Section: Examen B Explanation
Explanation/Reference:
QUESTION 76
Which two statements are true about BPDU port-guard and BPDU filtering? (Choose two.)
A. BPDU port-guard can be enabled globally, whereas BPDU filtering must be enabled on a per-interface basis.
B. When globally enabled, BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.
C. When globally enabled, BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.
D. When a BPDU is received on a BPDU port-guard enabled port, the interface goes into the err-disabled state.
E. When a BPDU is received on a BPDU filtering enabled port, the interface goes into the err-disabled state.
F. When a BPDU is received on a BPDU filtering enabled port, the interface goes into the STP blocking state.
Correct Answer: BD Section: Examen B Explanation
Explanation/Reference:
QUESTION 77
Refer to the exhibit. Switch 15 is configured as the root switch for VLAN 10 but not for VLAN 20. If t STP configuration is correct, what will be true about Switch 15?
A. All ports will be in forwarding mode.
B. All ports in VLAN 10 will be in forwarding mode.
C. All ports in VLAN 10 will be in forwarding mode and all ports in VLAN 20 will be in blocking mode.
D. All ports in VLAN 10 will be in forwarding mode and all ports in VLAN 20 will be in standby mode.
