1. A network is experiencing performance degradation on an access switch where user traffic is subject to granular QoS policy and security inspection. Which switch component or components should be inspected by the network administrator to help determine the issue?
the ingress interfaces only
the egress interfaces only
the forwarding plane only
the control plane only
the forwarding plane and the control plane
the ingress and egress interfaces, the forwarding plane, and the control plane
the egress interfaces only
the forwarding plane only
the control plane only
the forwarding plane and the control plane
the ingress and egress interfaces, the forwarding plane, and the control plane
2. A network administrator has configured a Cisco IOS device to provide server load balancing (SLB) for the corporate web server. What is required on the client side to ensure proper load balancing?
Clients should initiate connections to the virtual IP address (VIP).
Clients should initiate connections to the IP address of the predictor.
Port numbers should be added to each client request in order to get routed to the correct server.
Clients must be readdressed so that they are equally distributed throughout the network address space.
Clients should initiate connections to the virtual IP address (VIP).
Clients should initiate connections to the IP address of the predictor.
Port numbers should be added to each client request in order to get routed to the correct server.
Clients must be readdressed so that they are equally distributed throughout the network address space.
3.
Refer to the exhibit. A network administrator is investigating performance issues of the access switch. On the basis of the provided outputs, what conclusion can be made about the switch performance?
The ratio between the FCS errors and the number of received errors is normal and does not require further investigation.
The ratio between the FCS errors and the number of giant frames that are received on the switch is excessively high and requires further investigation.
The ratio between the FCS errors and the number of broadcast and multicast traffic frames that are received on the switch is normal and does not require further investigation.
The ratio between the FCS errors and the number of unicast, broadcast, and multicast traffic frames that are received on the switch is excessively high and requires further investigation.
Refer to the exhibit. A network administrator is investigating performance issues of the access switch. On the basis of the provided outputs, what conclusion can be made about the switch performance?
The ratio between the FCS errors and the number of received errors is normal and does not require further investigation.
The ratio between the FCS errors and the number of giant frames that are received on the switch is excessively high and requires further investigation.
The ratio between the FCS errors and the number of broadcast and multicast traffic frames that are received on the switch is normal and does not require further investigation.
The ratio between the FCS errors and the number of unicast, broadcast, and multicast traffic frames that are received on the switch is excessively high and requires further investigation.
4. What reported error counter describes frames that do not end with an integral number of octets and have a bad cyclic redundancy check (CRC)?
FCS-Err
Xmit-Err
Align-Err
Rcv-Err
undersize
runt
FCS-Err
Xmit-Err
Align-Err
Rcv-Err
undersize
runt
5. What must a system administrator do to allow NBAR to recognize a new protocol without having to upgrade the Cisco IOS image?
Enable the autodiscovery feature on the interface.
Upgrade the version of NBAR that is running on the device.
Because NBAR will automatically discover new applications, the administrator does not need to do anything.
Load an appropriate Packet Description Language Module (PDLM).
Enable the autodiscovery feature on the interface.
Upgrade the version of NBAR that is running on the device.
Because NBAR will automatically discover new applications, the administrator does not need to do anything.
Load an appropriate Packet Description Language Module (PDLM).
6. What can cause a memory leak on a router?
an IOS bug
incorrect configuration registry code
buffer overflow
too many remote users logged into the router
an IOS bug
incorrect configuration registry code
buffer overflow
too many remote users logged into the router
7.
Refer to the exhibit. Users on the network are complaining that transferring large files to the SRV1 server takes hours. A network administrator runs a few tests on both switches to investigate the problem. On the basis of the provided outputs, what could be the possible reason for problem?
High CPU utilization is causing excessive FCS errors on ASW_1.
A duplex mismatch is causing a high volume of late collisions on DSW_1.
Slow STP convergence is causing a high volume of single collisions on DSW_1.
An unsupported Auto-MDIX feature on both switches is causing a high volume of multi collisions.
Refer to the exhibit. Users on the network are complaining that transferring large files to the SRV1 server takes hours. A network administrator runs a few tests on both switches to investigate the problem. On the basis of the provided outputs, what could be the possible reason for problem?
High CPU utilization is causing excessive FCS errors on ASW_1.
A duplex mismatch is causing a high volume of late collisions on DSW_1.
Slow STP convergence is causing a high volume of single collisions on DSW_1.
An unsupported Auto-MDIX feature on both switches is causing a high volume of multi collisions.
8. How can an administrator determine if a memory leak is present in a router?
The show interface command will show that the input queue has reached the maximum capacity.
The show buffers command will show no free buffers.
The show memory allocating-process totals command will show low free space.
The show diagnostics command will show that the DRAM size has reached maximum capacity.
The show interface command will show that the input queue has reached the maximum capacity.
The show buffers command will show no free buffers.
The show memory allocating-process totals command will show low free space.
The show diagnostics command will show that the DRAM size has reached maximum capacity.
9. Which three hardware components are common in the architectures of all Catalyst switch families? (Choose three.)
route processors
modules
interfaces
forwarding hardware
control plane hardware
content-addressable memory
route processors
modules
interfaces
forwarding hardware
control plane hardware
content-addressable memory
10.
Refer to the exhibit. A network administrator enables AutoQoS on a PPP link that is currently active. Once AutoQoS is enabled the link goes down. What should the administrator do to correct this problem?
Disable multilink on the PPP connection.
Decrease the multilink threshold value to allow AutoQoS to run.
Change the encapsulation to HDLC because AutoQoS does not support PPP.
Investigate the configured bandwidth on the PPP link to ensure it is sufficient, then remove and reapply the AutoQoS configuration.
Refer to the exhibit. A network administrator enables AutoQoS on a PPP link that is currently active. Once AutoQoS is enabled the link goes down. What should the administrator do to correct this problem?
Disable multilink on the PPP connection.
Decrease the multilink threshold value to allow AutoQoS to run.
Change the encapsulation to HDLC because AutoQoS does not support PPP.
Investigate the configured bandwidth on the PPP link to ensure it is sufficient, then remove and reapply the AutoQoS configuration.
11. A network administrator keeps receiving “%SYS-2-MALLOCFAIL” console messages. Further investigation reveals that the buffer pool continues to grow. The CCO knowledge base identified the cause of the problem as a result of a buffer memory leak due to an IOS software bug. What should the administrator do to rectify this problem?
Reload the router.
Reinstall older Cisco IOS software.
Upgrade the Cisco IOS software to a version that fixes the issue.
Power down the router and wait a few minutes before reloading it.
Change the configuration register settings to bypass the loading of the IOS.
Change the configuration register settings to bypass the loading of the startup configuration file.
Reload the router.
Reinstall older Cisco IOS software.
Upgrade the Cisco IOS software to a version that fixes the issue.
Power down the router and wait a few minutes before reloading it.
Change the configuration register settings to bypass the loading of the IOS.
Change the configuration register settings to bypass the loading of the startup configuration file.
12.
Refer to the exhibit. A network administrator is troubleshooting the switching path on a router. Based on the exhibited output, what can be concluded?
Cisco Express Forwarding (CEF) has been implemented.
Fast switching has been enabled.
Process switching has been enabled.
Switching has been disabled.
Refer to the exhibit. A network administrator is troubleshooting the switching path on a router. Based on the exhibited output, what can be concluded?
Cisco Express Forwarding (CEF) has been implemented.
Fast switching has been enabled.
Process switching has been enabled.
Switching has been disabled.
13. A network administrator plans to implement QoS in the network by using the Cisco AutoQoS tool. What should be done in the first phase of the automation process?
In order to apply QoS policies, each interface should be configured with the auto qos command.
Cisco Express Forwarding should be disabled on each target interface by the use of the no ip cef command.
The network device should be configured to capture network traffic statistics via the use of the auto discovery qos interface configuration command.
Via the use of the ip nbar protocol-discovery command, each interface should be configured to gather information about the applications that are known to NBAR.
In order to apply QoS policies, each interface should be configured with the auto qos command.
Cisco Express Forwarding should be disabled on each target interface by the use of the no ip cef command.
The network device should be configured to capture network traffic statistics via the use of the auto discovery qos interface configuration command.
Via the use of the ip nbar protocol-discovery command, each interface should be configured to gather information about the applications that are known to NBAR.
14.
Refer to the exhibit. What can be determined about the operation of interface FastEthernet 0/2?
It is connected to a hub.
It is operating within acceptable limits.
It is carrying 802.1Q formatted frames.
It has a duplex mismatch with the connected device.
Refer to the exhibit. What can be determined about the operation of interface FastEthernet 0/2?
It is connected to a hub.
It is operating within acceptable limits.
It is carrying 802.1Q formatted frames.
It has a duplex mismatch with the connected device.
15.
Refer to the exhibit. What can be determined from the exhibited output?
There is a physical layer problem.
The interface is performing normally.
The Frame Relay PVC is not established.
There is an unacceptable level of input errors.
Refer to the exhibit. What can be determined from the exhibited output?
There is a physical layer problem.
The interface is performing normally.
The Frame Relay PVC is not established.
There is an unacceptable level of input errors.
16. What are three indicators of a cabling issue on a switch? (Choose three.)
alignment error
excessive collisions
giant frames
invalid frame size
late collisions
transmit error
alignment error
excessive collisions
giant frames
invalid frame size
late collisions
transmit error
17.
Refer to the exhibit. A network administrator has noticed that the IP SLA probe did not run as expected. What should the administrator do to correct this problem?
Adjust the clock frequency on R1.
Configure the router as a stratum 1 time source.
Remove the forever keyword from the configuration.
Configure NTP on the router to point to a different time source.
Refer to the exhibit. A network administrator has noticed that the IP SLA probe did not run as expected. What should the administrator do to correct this problem?
Adjust the clock frequency on R1.
Configure the router as a stratum 1 time source.
Remove the forever keyword from the configuration.
Configure NTP on the router to point to a different time source.
18.
Refer to the exhibit. Based on the output of the show interfaces command, which two statements are true? (Choose two.)
The interface is currently shutdown.
The interface is displaying symptoms of a buffer leak.
This is an example of a wedged interface.
The interface has been configured with the no ip route-cache command.
The serial interface is being subjected to a denial of service (DoS) attack.
Refer to the exhibit. Based on the output of the show interfaces command, which two statements are true? (Choose two.)
The interface is currently shutdown.
The interface is displaying symptoms of a buffer leak.
This is an example of a wedged interface.
The interface has been configured with the no ip route-cache command.
The serial interface is being subjected to a denial of service (DoS) attack.
19. A network administrator wishes to use debug commands to observe how a router processes each individual packet on an interface. Which packet switching solution should be implemented on the interface to accomplish this task?
Enable Cisco Express Forwarding (CEF) using the ip cef comand.
Enable Cisco Express Forwarding (CEF) using the no ip cef command.
Enable fast switching using the ip route-cache command.
Enable fast switching using the no ip route-cache command.
Enable process switching using the ip route-cache command.
Enable process switching using the no ip route-cache command.
Enable Cisco Express Forwarding (CEF) using the ip cef comand.
Enable Cisco Express Forwarding (CEF) using the no ip cef command.
Enable fast switching using the ip route-cache command.
Enable fast switching using the no ip route-cache command.
Enable process switching using the ip route-cache command.
Enable process switching using the no ip route-cache command.
20. Which three Cisco packet switching methods must a network administrator be familiar with in order to troubleshoot a router performance issue that is related to the switching path? (Choose three.)
autonomous switching
Cisco Express Forwarding (CEF)
fast switching
optimum switching
process switching
silicon switching
autonomous switching
Cisco Express Forwarding (CEF)
fast switching
optimum switching
process switching
silicon switching
