CCNP 642-812-Update(Oct-2009) New Questions

Ensurepass

1. You are a network technician of your company. Refer to the following commands, which one will you use to cause a PortFast-enabled interface to lose its PortFast-operational status and disable BPDU filtering if it receives BPDUs?

A. spanning-tree portfast bpduguard default

B. spanning-tree guard root

C. spanning-tree bpduguard enable

D. spanning-tree portfast bpdufilter default

Answer:D

2. Study the following spanning-tree commands carefully, which one is approximately equivalent to disabling spanning tree for this interface and cause that interface susceptible to spanning-tree loops?

A. spanning-tree portfast bpduguard default

B. spanning-tree bpdufilter enable

C. spanning-tree bpduguard enable

D. spanning-tree guard root

Answer: B

3. What is the objective of the global configuration command spanning-tree loopguard default?

A. Provides fast convergence after a direct link failure where a root port transitions to the forwarding state immediately without going through the listening and learning states.

B. When any port receives a BPDU, it is put it in the error-disabled state.

C. An interface is moved directly to the spanning-tree forwarding state without waiting for the standard forward-time delay.

D. Prevents alternate or root ports from becoming designated ports because of a failure that leads to aunidirectional link.

Answer: D

4. It is a computer security exploit, a method of attacking networked resources on a VLAN. The basic concept behind this attack is for an attacking host on a VLAN using double tagging to gain access to data on other VLANs that would normally not be accessible. What is it?

A. VLAN jumping

B. DHCP spoofing

C. VLAN hopping

D. MAC flooding

Answer: C

5. DHCP snooping acts like a firewall between untrusted hosts and DHCP servers. Can you summarize how DHCP snooping works?

A. DHCP snooping validates all DHCP responses from all switch ports and only allows packets through if the destination port specifically sent a DHCP request.

B. DHCP snooping validates the header information of all DHCP replies and only allows the reply through if it has a matching request in the DSRT.

C. DHCP snooping validates all DHCP responses from all switch ports and only allows packets through if the destination port sent a DHCP request in the last 5 seconds.

D. DHCP snooping determines which switch ports are trusted and can source all DHCP messages.

Answer: D

6. Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway. Workstations on a segment with HSRP operating need to have their IP default gateway configured for which device?

A. backup router

B. virtual router

C. standby router

D. router physically connected to the network segment

Answer: B

That is all, hope to helpful for you. Best Luck for ur Exam.

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