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 CCNA Questions

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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 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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Q:

You are connecting an access point and it is set to root. What does extended service set ID mean?

A) That you have more than one access point and they are in the same SSID connected by a distribution system B) That you have more than one access point and they are in seperate SSIDs connected by a distribution system
C) That you have multiple access points, but they are placed physically in different buildings D) That you have multiple access points, but one is a repeater access point
 
Answer & Explanation Answer: A) That you have more than one access point and they are in the same SSID connected by a distribution system

Explanation:

Extended service set ID means that you have more than one access point and they all are set to the same SSID and all are connected together in the same VLAN or distribution system so users can roam.

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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:

Which part of a MAC address is called the organizationally unique identifier(OUI)?

A) The first 24 bits, or 3 bytes B) The first 12 bits, or 3 bytes
C) The first 24 bits, or 6 bytes D) The first 32 bits, or 3 bytes
 
Answer & Explanation Answer: A) The first 24 bits, or 3 bytes

Explanation:

The first 24 bits, or 3 bytes, of a MAC address is called the organizationally unique identifier (OUI).

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Q:

You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?

A) The router is not configured for the new host B) The VTP configuration on the switch is not updated for the new host
C) The host has an invalid MAC address D) The switch port the host is connected to is not configured with the correct VLAN membership
 
Answer & Explanation Answer: D) The switch port the host is connected to is not configured with the correct VLAN membership

Explanation:

This question is a little Vague, but the best answer is that the VLAN membership for the port is not configured

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Q:

Differentiate the DoD and the OSI network models?

Answer

The DoD model is a condensed version of the OSI model, composed of four layers instead of seven, but is nonetheless like the OSI model in that it can be used to describe packet creation and devices and protocols can be mapped to its layers.

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Q:

Users on the 192.168.10.0/24 network must access files located on the Server 1. What route could be configured on router R1 for file requests to reach the server?

A. IP route 0.0.0.0 0.0.0.0 s0/0/0
B. IP route 0.0.0.0 0.0.0.0 209.165.200.226
C. IP route 209.165.200.0 255.255.255.0 192.168.10.250
D. IP route 192.168.10.0 255.255.255.0 209.165.100.250

Answer

Answer : A

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