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Q21. Which technique allows specific VLANs to be strictly permitted by the administrator?

A. VTP pruning

B. transparent bridging

C. trunk allowed VLANs

D. VLAN access-list

E. L2P tunneling

Answer: C


Q22. For client server failover purposes, the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. For their disaster recovery feature to operate successfully, they require the switchport to enter a forwarding state immediately. Which spanning-tree feature satisfies this requirement?

A. Rapid Spanning-Tree

B. Spanning-Tree Timers

C. Spanning-Tree FastPort

D. Spanning-Tree PortFast

E. Spanning-Tree Fast Forward

Answer: D


Q23. Refer to the exhibit.

A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. What is causing the line protocol on this interface to be shown as down?

A. There is a layer 1 physical issue.

B. There is a speed mismatch on the interface.

C. The interface is configured as the target of the SPAN session.

D. The interface is configured as the source of the SPAN session.

E. There is a duplex mismatch on the interface.

Answer: C


Q24. A network engineer has just deployed a non-Cisco device in the network and wants to get information about it from a connected device. Cisco Discovery Protocol is not supported, so the open standard protocol must be configured. Which protocol does the network engineer configure on both devices to accomplish this?

A. IRDP

B. LLDP

C. NDP

D. LLTD

Answer: B


Q25. When IP Source Guard with source IP filtering is enabled on an interface, which feature must be enabled on the access VLAN for that interface?

A. DHCP snooping

B. storm control

C. spanning-tree portfast

D. private VLAN

Answer: A


Q26. Which statement about LLDP-MED is true?

A. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices.

B. LLDP-MED is an extension to LLDP that operates only between network devices.

C. LLDP-MED is an extension to LLDP that operates only between endpoint devices.

D. LLDP-MED is an extension to LLDP that operates between routers that run BGP.

Answer: A


Q27. Refer to the exhibit.

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch B has all VLANs, but Switch C is not receiving traffic from certain VLANs. What would cause this issue?

A. A VTP authentication mismatch occurred between Switch A and Switch B.

B. The VTP revision number of Switch B is higher than that of Switch A.

C. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C.

D. The trunk between Switch A and Switch B is misconfigured.

Answer: C


Q28. which statement about the use of PAgP link aggregation on a Cisco switch that is running Cisco IOS Software is true?

A. PAgP modes are off, auto, desirable, and on. Only the combinations auto-desirable, desirable-desirable, and on-on allow the formation of a channel.

B. PAgP modes are active, desirable, and on. Only the combinations active-desirable, desirable-desirable, and on-on allow the formation of a channel.

C. PAgP modes are active, desirable, and on. Only the combinations active-active, desirable-desirable, and on-on allow the formation of a channel.

D. PAgP modes are off, active, desirable, and on. Only the combinations auto-auto, desirable-desirable, and on-on allow the formation of a channel.

Answer: A


Q29. While working in the core network building, a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. As designed, the link was placed into a non-forwarding state due to a fault with UDLD. After the damaged cable was replaced, the link did not recover. What solution allows the network switch to automatically recover from such an issue?

A. macros

B. errdisable autorecovery

C. IP Event Dampening

D. command aliases

E. Bidirectional Forwarding Detection

Answer: B


Q30. Which authentication service is needed to configure 802.1x?

A. RADIUS with EAP Extension

B. TACACS+

C. RADIUS with CoA

D. RADIUS using VSA

Answer: A