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Q:

Suppose you have a customer who has a central HQ and six branch offices. The customer anticipates adding six more branches in the near future. It whishes to implement a WAN technology that will allow the branches to economically connect to HQ and you have no free ports on the HQ router. which of the following would you recommend?

A) PPP	B) HDLC
C) Frame Relay	D) ISDN

Answer & Explanation Answer: C) Frame Relay

Explanation:

The key is "there are no free ports" on your router. Only Frame Relay can provide a connection to multiple locations with one interface, and in an economical manner no less.

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Q:

A wireless client cannot connect to an 802.11b/g BSS with a b/g wireless card. The client section of the access point does not list any active WLAN clients. What is a possible reason for this?

A) The incorrect channel is configured on the client	B) The Client's IP address is on the wrong subnet
C) The client has an incorrect pre-shared key	D) The SSID is configured incorrectly on the client

Answer & Explanation Answer: D) The SSID is configured incorrectly on the client

Explanation:

Although this question is cryptic at best, the only possible answer is option D. If the SSID is not being broadcast (which we must assume in this question), the client must be configured with the correct SSID in order to associate to the AP.

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Q:

How many non- overlapping channels are available with 802.11b?

A) 3	B) 12
C) 23	D) 40

Answer & Explanation Answer: A) 3

Explanation:

The IEEE 802.11b standard provides three non-overlapping channels.

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Q:

Your inside locals are not being translated to the inside global addresses. Which of the following commands will show you if your inside globals are allowed to use the NAT pool?

ip nat pool Corp 198.18.41.129 198.18.41.134 netmask 255.255.255.248

ip nat inside source list 100 int pool Corp overload

A) debug ip nat	B) show access - list
C) show ip nat translation	D) show ip nat statistics

Answer & Explanation Answer: B) show access - list

Explanation:

Once you create your pool, the command ip nat inside source must be used to say which inside locals are allowed to use the pool. In this question we need to see if access - list 100 is configured correctly, if at all , so show access - list is the best answer.

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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:

Which switching technology reduces the size of a broadcast domain?

A) ISL	B) 802.1Q
C) VLANs	D) STP

Answer & Explanation Answer: C) VLANs

Explanation:

Virtual LANs break up broadcast domains in layer 2 switched internetworks.

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Q:

If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

A) Discard it and send an error message back to the originating host	B) Flood the network with the frame
C) Add the source addres and port to the MAC address table and forward the frame out the destination port	D) Add the destination to the MAC address table and then forward the frame

Answer & Explanation Answer: C) Add the source addres and port to the MAC address table and forward the frame out the destination port

Explanation:

Since the source MAC address is not in the MAC address table, the switch will add the source address and the port it is connected to into the MAC address table and then forward the frame to the outgoing port.

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Q:

What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

A) Forwards the switch to the first available link	B) Drops the frame
C) Floods the network with the frame looking for the device	D) Sends back a message to the originating station asking for a name resolution

Answer & Explanation Answer: C) Floods the network with the frame looking for the device

Explanation:

Switches flood all frames that have an unknown destination address. If a device answers the frame, the switch will update the MAC address table to reflect the location of the device.

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