Training

642-812 Training

Building Cisco Multilayer Switched Networks
Exam Number/Code : 642-812
Exam Name : Building Cisco Multilayer Switched Networks
Questions and Answers : 227 Q&As
Update Time: 2010-03-19
642-812 Price: $ 63.00

3. Refer to the exhibit. Dynamic ARP inspection (DAI) is enabled on switch SW_A only. Both Host_A and Host_B acquire their IP addresses from the DHCP server connected to switch SW_A. What would the outcome be if Host_B initiated an ARP spoof attack toward Host_A ?
A. The spoof packets will be inspected at the ingress port of switch SW_A and will be permitted.
B. The spoof packets will be inspected at the ingress port of switch SW_A and will be dropped.
C. The spoof packets will not be inspected at the ingress port of switch SW_A and will be permitted.
D. The spoof packets will not be inspected at the ingress port of switch SW_A and will be dropped.
Answer: C

4. Which statement describes the function of a trust boundary?
A. Trust boundaries determine whether certain types of traffic can pass.
B. Trust boundaries are a point in the network where decisions about CoS markings on incoming packets are made.
C. Trust boundaries are a point in the network where QoS functionality begins and ends.
D. Trust boundaries are points in the network where Layer 2 CoS markings are converted to Layer 3 DSCP or IP precedence markings.
Answer: B

5. Refer to the exhibit. Which Catalyst switch interface command would be used to cause the switch to instruct the phone to override the incoming CoS from the PC before forwarding the packet to the switch?
A. switchport priority extend trust
B. switchport priority extend cos 2
C. switchport priority extend cos 11
D. mls qos cos 2
E. mls qos cos 2 override
Answer: B

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