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SWITCH (642-813): Operations Questions
Question 1
Which statement about when standard access control lists are applied to an interface to control inbound or outbound traffic is true?
A. The best match of the ACL entries is used for granularity of control.
B. They use source IP information for matching operations.
C. They use source and destination IP information for matching operations.
D. They use source IP information along with protocol-type information for finer granularity of control.
Answer: B
Explanation
The syntax of a standard ACL is:
Therefore a standard ACL can only use the source address for matching operations.
Question 2
Which statement about the EIGRP routing being performed by the switch is true?
Switch# show ip eigrp neighbors
A. The EIGRP neighbor table contains 20 neighbors.
B. EIGRP is running normally and receiving IPv4 routing updates.
C. EIGRP status cannot be determined. The command show ip eigrp topology would determine the routing protocol status.
D. The switch has not established any neighbor relationships. Further network testing and troubleshooting must be performed to determine the cause of the problem.
Answer: D
Explanation
There is no field under “EIGRP-IPv4:(20) neighbors for process 20″. That means the switch has not established any neighbor relationships -> D is correct.
Question 3
Which two characteristics apply to Cisco Catalyst 6500 Series Switch supervisor redundancy using NSF? (Choose two)
A. supported by RIPv2, OSPF, IS-IS, and EIGRP
B. uses the FIB table
C. supports IPv4 and IPv6 multicast
D. prevents route flapping
E. independent of SSO
F. NSF combined with SSO enables supervisor engine load balancing
Answer: B D
Explanation
Layers 2–4 convergence time is enhanced in Cisco 4500 and 6500 series switches with redundant route processors (RP) by using NSF with SSO. When using this, only one RP is active. The standby RP synchronizes its configuration and dynamic state information (such as CEF, MAC, and FIB tables) with the active RP. When the active RP fails, SSO enables the standby RP to take over immediately. NSF keeps the switch forwarding traffic during the switchover, using the existing route and CEF tables. The goal of NSF with SSO is to prevent routing adjacencies from resetting, which prevents a routing flap. The switchover to the new RP must be completed before routing timers expire, or the router’s neighbors will tear down their adjacency and routing will be disrupted.
Question 4
What does the command “udld reset” accomplish?
A. allows a UDLD port to automatically reset when it has been shut down
B. resets all UDLD enabled ports that have been shut down
C. removes all UDLD configurations from interfaces that were globally enabled
D. removes all UDLD configurations from interfaces that were enabled per-port
Answer: B
Explanation
The “udld reset” (in global mode) will re-enable all ports that UDLD has errdisabled.
Question 5
Which two items are most important for managing the long-term success of high availability? (Choose two)
A. Completing aggressive implementation schedule
B. Stateful Switchover
C. Company and user expectations
D. Nonstop Forwarding
E. Change control processes
F. Dual devices and dual links
Answer: C E
Which statement about when standard access control lists are applied to an interface to control inbound or outbound traffic is true?
A. The best match of the ACL entries is used for granularity of control.
B. They use source IP information for matching operations.
C. They use source and destination IP information for matching operations.
D. They use source IP information along with protocol-type information for finer granularity of control.
Answer: B
Explanation
The syntax of a standard ACL is:
| access-list access-list-number {permit | deny} source {source-mask} |
Question 2
Which statement about the EIGRP routing being performed by the switch is true?
Switch# show ip eigrp neighbors
| EIGRP-IPv4:(20) neighbors for process 20 |
B. EIGRP is running normally and receiving IPv4 routing updates.
C. EIGRP status cannot be determined. The command show ip eigrp topology would determine the routing protocol status.
D. The switch has not established any neighbor relationships. Further network testing and troubleshooting must be performed to determine the cause of the problem.
Answer: D
Explanation
There is no field under “EIGRP-IPv4:(20) neighbors for process 20″. That means the switch has not established any neighbor relationships -> D is correct.
Question 3
Which two characteristics apply to Cisco Catalyst 6500 Series Switch supervisor redundancy using NSF? (Choose two)
A. supported by RIPv2, OSPF, IS-IS, and EIGRP
B. uses the FIB table
C. supports IPv4 and IPv6 multicast
D. prevents route flapping
E. independent of SSO
F. NSF combined with SSO enables supervisor engine load balancing
Answer: B D
Explanation
Layers 2–4 convergence time is enhanced in Cisco 4500 and 6500 series switches with redundant route processors (RP) by using NSF with SSO. When using this, only one RP is active. The standby RP synchronizes its configuration and dynamic state information (such as CEF, MAC, and FIB tables) with the active RP. When the active RP fails, SSO enables the standby RP to take over immediately. NSF keeps the switch forwarding traffic during the switchover, using the existing route and CEF tables. The goal of NSF with SSO is to prevent routing adjacencies from resetting, which prevents a routing flap. The switchover to the new RP must be completed before routing timers expire, or the router’s neighbors will tear down their adjacency and routing will be disrupted.
Question 4
What does the command “udld reset” accomplish?
A. allows a UDLD port to automatically reset when it has been shut down
B. resets all UDLD enabled ports that have been shut down
C. removes all UDLD configurations from interfaces that were globally enabled
D. removes all UDLD configurations from interfaces that were enabled per-port
Answer: B
Explanation
The “udld reset” (in global mode) will re-enable all ports that UDLD has errdisabled.
Question 5
Which two items are most important for managing the long-term success of high availability? (Choose two)
A. Completing aggressive implementation schedule
B. Stateful Switchover
C. Company and user expectations
D. Nonstop Forwarding
E. Change control processes
F. Dual devices and dual links
Answer: C E