CISCO Certification Questions

Q:

You want to improve network performance by increasing the bandwidth available to hosts and limit the size of the broadcast domains. Which of the following options will achieve this goal?

A) Managed hubs B) Bridges
C) Switches D) Switches configured with VLANs
 
Answer & Explanation Answer: D) Switches configured with VLANs

Explanation:

By creating and implementing VLANs in your switched network, you can break up broadcast domains at layer2. For hosts on different VLANs to communicate, you must have a router or layer 3 switch. 

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Q:

Which command will allow you to see real - time translations on your router?

A) show ip nat translations B) show ip nat statistics
C) debug ip nat D) clear ip nat translations
 
Answer & Explanation Answer: C) debug ip nat

Explanation:

The command debug ip nat will show you in real time the translations occurring on your router.

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Q:

After the devices have been configured as shown, it is determined that the branch office in Chicago doesn't have connectivity to the Internet through the headquarters in Dallas. How would you fix the problem?

A) Change ip address on the WAN side of the Chicago router B) Change ip address on the LAN side of the Chicago router
C) Change ip address on the LAN side of the Dallas router D) Change ip address on the WAN side of the Dallas router
 
Answer & Explanation Answer: A) Change ip address on the WAN side of the Chicago router

Explanation:

192.168.20.3/30 is not a valid ip address, should be 192.168.20.1/30

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Q:

What command do you type to save the configuration stored in RAM to NVRAM?

A) Router (config) #copy current to starting B) Router #copy starting to running
C) Router (config) #copy running - config startup - config D) Router#copy run start
 
Answer & Explanation Answer: D) Router#copy run start

Explanation:

To copy the running - config to NVRAM so that it will be used if the router is restarted , use the copy running-config startup-config command in privileged mode (copy run start for short).

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Q:

What is the frequency range of the IEEE 802.11g standard?

A) 2.4 Gbps B) 5Gbps
C) 2.4GHz D) 5GHz
 
Answer & Explanation Answer: C) 2.4GHz

Explanation:

The IEEE 802.11b and IEEE 802.11g standards both run in the 2.4GHz RF range.

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Q:

You have two switches connected together with two crossover cables for redundancy, and STP is disabled. Which of the following will happen between the switches?

A) The routing tables on the switches will not update B) The MAC forward/;filter table will not update on the switch
C) Broadcast storms will occur on the switched network D) The switches will automatically load-balance between the two links
 
Answer & Explanation Answer: C) Broadcast storms will occur on the switched network

Explanation:

If spanning tree is disabled on a switch and you have redundant links to another switch, broadcast stroms will occur, among other possible problems.

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Q:

You have finished physically installing an access point on the ceiling of your office. At a minimum, which parameter must be configured on the access point in order to allow a wireless client to operate on it?

A) AES B) PSK
C) SSID D) WEp
 
Answer & Explanation Answer: C) SSID

Explanation:

The minimum parameter configured on an AP for a simple WLAN installation is the SSID, although you should set the channel and authntication method as well.

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Q:

You get a call from a network administrator who tells you that he typed the following into his router:

Router (config) #router ospf 1

Router (config-router) # network 10.0.0.0. 255. 0.0.0 area 0

He tells you he still can't see any routes in the routing table. What configuration error did the administrator make?

A) The wildcard mask is incorrect B) The OSPF area is wrong
C) The OSPF Process ID is incorrect. D) The AS configuration is wrong
 
Answer & Explanation Answer: A) The wildcard mask is incorrect

Explanation:

The administrator typed in the wrong wildcard mask configuration. The wildcard should have been 0.0.0.255 or even 0.255.255.255.

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