CISCO Certification problems
- 1. You are troubleshooting a connectivity problem in your corporate network and want to isolate the problem. You suspect that a router on the route to an unreachable network is at fault. What IOS user exec command should you issue?
Options- A. Router>ping
- B. Router>trace
- C. Router>show ip route
- D. Router>show interface Discuss
Correct Answer: Router>trace
Explanation:
The command traceroute (trace for short), which can be issued from user mode or privileged mode, is used to find the path a packet takes through an internetwork and will also show you where the packet stops because of an error on a router.
- 2. You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?
Options- A. Issue the show ip route command on the router connected to the switch
- B. Issue the show cdp neighbor command on the router connected to the switch
- C. Issue the show ip arp command on the router connected to the switch
- D. Issue the show cdp neighbors detail command on the router connected to the switch Discuss
Correct Answer: Issue the show cdp neighbors detail command on the router connected to the switch
Explanation:
Although option A is certainly the "best" answer, unfortunately option E will work just fine and your boss would probably prefer you to use the show cdp neighbors detail command.
- 3. If you want to have more than one Telnet session open at the same time, what keystroke combination would you use?
Options- A. Tab+spacebar
- B. Ctrl+X, then 6
- C. Ctrl+Shift+X, then 6
- D. Ctrl+Shift+6, then X Discuss
Correct Answer: Ctrl+Shift+6, then X
Explanation:
To keep open one or more Telnet sessions, use the Ctrl+Shift+6 and then X keystroke combination.
- 4. What is the command to copy a Cisco IOS to a TFTP server? Discuss
Correct Answer: copy flash tftp
- 5. Which of the following is the best description of the operation of split horizon?
Options- A. Information about a route should not be sent back in the direction from which the original update came
- B. It splits the traffic when you have a large bus (horizon) physical network
- C. It holds the regular updates from broadcasting to a downed link
- D. It prevents regular update messages from reinstating a route that has gone down Discuss
Correct Answer: Information about a route should not be sent back in the direction from which the original update came
Explanation:
A split horizon will not advertise a route back to the same router it learned the route from.
- 6. Which command displays RIP routing updates?
Options- A. Show ip route
- B. debug ip rip
- C. show protocols
- D. Debug ip route Discuss
Correct Answer: debug ip rip
Explanation:
Debug ip rip is used to show the internet Protocol (IP) Routng Information protocol (RIP) updates being sent and received on the router.
- 7. What metric does RIPv2 use to find the best path to a remote network?
Options- A. Hop count
- B. MTU
- C. Cumulative interface delay
- D. Load Discuss
Correct Answer: Hop count
Explanation:
RIPv1 and RIPv2 only use the lowest hop count to determine the best path to a remote network.
- 8. Two connected routers are configured only with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?
Options- A. The updated information will be added to the existing routing table
- B. The update will be ignored and no further action will occur
- C. The updated information will replace the existing routing table entry
- D. The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence Discuss
Correct Answer: The update will be ignored and no further action will occur
Explanation:
When a routing update is received by a router, the router first checks the administrative distance (AD) and always chooses the route with the lowest AD. However, if two routes are received and they both have the same AD and differing metrics , then the router will choose the one route with the lowest metrics or , in RIP's case, hop count.
- 9. When a PC sends a packet to another PC in a remote network, what destination IP address and MAC address will be in the frame that it sends to its default gateway? Discuss
Correct Answer: It will use the gateway interface MAC at L2 and the actual destination IP at L3
- 10. If routers in a single area are configured with the same priority value, what value does a router use for the OSPF Router ID in the absence of a loopback interface?
Options- A. The Lowest IP address of any physical interface
- B. The Highest IP address of any physical interface
- C. The Lowest IP address of any logical interface
- D. The Highest IP address of any logical interface Discuss
Correct Answer: The Highest IP address of any physical interface
Explanation:
At the moment of OSPF process startup, the highest IP address on any active interface will be the Router ID (RID) of the router . If you have a loopback interface configured (logical interface), then that will override the interface IP address and become the RID of the router automatically.
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