Braindumps for "642-582" Exam

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Question 1.

Which of the following can you use to access the CLI screens on an Access Point? 
(Choose all that apply.)



A. IPSU

B. Console port

C. Telnet session

D. Browser window

E. Command Prompt window



Answer: B, C



Explanation:

Enter the commands in the command-line interface (CLI) to display the 
information. You can open the CLI with Telnet or with a terminal emulator 
through the access point's or bridge's serial port.



http://www.cisco.com/univercd/cc/td/doc/product/wireless/airo_350/accsspts/ap350rn/rn1108t1.htm




Reference:

Configuration guide for aironet 1200



Note:

The Telnet session or console port connection, is a quick and simple method for 
configuring the AP.



Question 2.

You are a technician at ITCertKeys. ITCertKeys uses 128-bit data encryption. How 
many bits is the Initialization Vector (IV)?



A. 4

B. 16

C. 24

D. 48

E. 64



Answer: C



Reference:

Cisco WLAN powerpoint



Explanation:

A 24-bit initialization vector (IV) is used to create the identical cipher 
streams in 128-bit data encryption



Question 3.

Which port will an Access Point pass data traffic through if it is set up as a 
repeater?



A. The Radio port

B. The Bridge port

C. The Console port

D. The Ethernet port



Answer: A



Reference:

Configuration guide for aironet 1200



Question 4.

Which is the most systematic way to conduct a site survey when using 
omnidirectional antennas?



A. Use 2.412 GHz when surveying.

B. Perform a two dimensional survey.

C. Start from every corner of the floor and move inward

D. Start from the center of the floor and move outward to every corner.



Answer: C



Reference:

Cisco site survey guide



Question 5.

Access Point10 in root mode (SSID = ‘123’) on the ITCertKeys network provides 
connection to repeater Access Point20 (SSID = ‘123’). Access Point10 is using 
Channel 1, what channel should

Access Point20 use?



A. Channel 1

B. Channel 2

C. Channel 10

D. Any channel except Channel 1.



Answer: A



Explanation:

The repeater must use the same channel with root/access point



Question 6.

You are the network administrator at ITCertKeys. ITCertKeys has two offices in 
Berlin,

Germany. The two offices are 20 km apart. You want to make a wireless bridge 
link with BR350s. With regard to this scenario, which of the following 
statements is true?



A. This cannot be done.

B. This requires the use of 21 dBi dish antennas and an amplifier.

C. This requires the use of a repeater site and four bridges.

D. This requires the use of 6 dBi patch antennas.



Answer: C



Explanation:

In Europe you can't use 21 dBi dish but we can set up a repeater site



Question 7.

What is the elliptical immediately surrounding the visual path of an RF signal 
is often referred to as?



A. Line of sight

B. The footprint

C. The Fresnel zone

D. Free space path loss

E. Atmospheric absorption



Answer: C



Reference:

Cisco antenna reference



Question 8.

You are a technician at ITCertKeys. You are installing two new, factory default 
BR352s. To enable these BR323s to pass traffic, what should you do?



A. Set the Ethernet port to active.

B. Set the Root to off on the remote bridge.

C. Do nothing. The BR323s will be able to communicate with default settings.

D. Set the frequency of the remote bridge to match the master bridge frequency.



Answer: B



Reference:

Cisco WLAN bridge 350 configuration guide



Question 9.

You have a Cisco Aironet wireless bridge. The center LED (status) on the bridge 
lashes amber.

What does this indicate?



A. A beacon packet is transmitted.

B. The light sequence of the Find utility.

C. An association from a client is established.

D. An error occurred and was written in the log.



Answer: D



Reference:

Cisco WLAN bridge 350 configuration guide



Question 10.

You are the network administrator at ITCertKeys. You want to increase the 
distance that two bridges can communicate. What can you do to accomplish this 
goal?



(Choose all that apply.)



A. Lower the data rate transmission.

B. Increase the data rate transmission.

C. Use an antenna with a decreased beamwidth.

D. Use an antenna with an increased beamwidth.



Answer: A, C



Explanation:

By lowering data rate and use high gain antenna like Yagi or Dish with a narrow 
beam width (compare to other omni and non directional antennas) the 
communication distance can be increased up to 40 km.



Reference:

Cisco WLAN PowerPoint



Question 11.

What is the most efficient and effective method of sealing connectors that are 
exposed to the environment?



A. Use RTV

B. Use duct tape

C. Use COAX-SEAL

D. Use electrical insulation tape



Answer: C



Reference:

Cisco WLAN PowerPoint



Question 12.

The root Access Point on the ITCertKeys network is set at channel 2. You need to 
install a repeater Access Point. What channel will the repeater Access Point use 
to associate to it?



A. Channel 1

B. Channel 2

C. It depends on the SSID

D. Any other non-overlapping channel



Answer: B



Explanation:

The repeater must use the same channel with root/access point.



Question 13.

You are the network administrator at ITCertKeys. The ITCertKeys network has 
several

Cisco Aironet wireless bridges. Your newly appointed ITCertKeys trainee wants to 
know what functions the lightning arrestor provides on the ITCertKeys network.



What will your reply be?



A. It dissipates any energy from a near lightning strike.

B. It absorbs all the energy from a direct lightning strike.

C. It dissipates all the energy from a direct lightning strike.

D. It bleeds of static discharges to help prevent a direct lightning strike.

E. It adds attenuation to the signal and separates data from the lightning 
strike’s energy.



Answer: A, D



Reference:

Cisco antenna reference



Question 14.

You are the network administrator at ITCertKeys. ITCertKeys has two offices. 
Each office consists of a single building. Two buildings are one mile apart. A 
Cisco Aironet Access Point is installed at each site connecting to the Ethernet 
LAN in each building. There is a 21 dBi dish antenna using 20 ft. cabling in 
each building and the antennas are aimed at each other. The buildings have clean 
line of sight. However, there is no network connection between the two networks.



What could be the probable cause of this problem?



A. The root parameters have not been set properly.

B. Access Points cannot be used for this mode of operation.

C. The dish antennas are too high of gain for the 1 mile distance.

D. The cables are too long for this distance/antenna combination.



Answer: B



Explanation:

A WLAN bridge must be used.



Question 15.

You newly appointed ITCertKeys trainee wants to know what the typical line of 
site is, without the use of towers, buildings, etc.

What would your reply be?



A. 2 miles

B. 6 miles

C. 8 miles

D. 12 miles



Answer: B



Reference:

Cisco WLAN PowerPoint



Question 16.

You are a technician at ITCertKeys. ITCertKeys has a single office located in 
San

Francisco, CA. You need to run 150 ft. coaxes on both ends of a point-to-point 
bridge link with BR350s. You decide to use LMR-600, which has a loss of 4.4 
db/100 feet. What is the EIRP of the system if running at 11 Mb with the 
Aironent 21 dBi dish antennas?



A. 34.4 dBm

B. 36.2 dBm

C. 45.3 dBm

D. 47.6 dBm



Answer: A



Explanation:

EIRP in U.S is not more than 36 dBm so calculation for EIRP= power 
output(dBm)+antenna gain(dBi)-cable loss which mean that 21 dBi should have only 
15 dBm and with cable loss is 6.6 dB from



Question 17.

When installing antennas, which methods can you use to determine the direction 
in which to align the antennas? (Choose all that apply.)



A. Cellular triangulation

B. Balloon and binoculars

C. Stroke light and binoculars

D. Global Positioning System (GPS)



Answer: B, C, D



Explanation:

Global Positioning System (GPS) Another “nice to have” item is a GPS device. 
Although you can use the odometer in your car to get fairly accurate distances 
between antennas in a point-to-point survey, a GPS will give extremely accurate 
readings as well as altitude. A GPS can also aid you in determining vehicle 
speeds in a highly mobile wireless installation and survey.



Question 18.

You are the network administrator at ITCertKeys. ITCertKeys has a 4-mile 
wireless link using Cisco Aironet wireless bridges in the U.S. The network is 
currently running at 2 Mb, with 13.5 Yagi antennas (vertically polarized), and 
50 ft. of Cisco cabling on either side. ITCertKeys wants to increase the 
wireless pipe by 11 Mb. However, the cabling cannot be shortened due to physical 
limitations.



What can you do to make this a solid 11 Mb pipe?



A. Implement an amplifier on each site.

B. Replace the Yagi antennas with dish antennas.

C. Rotate the antennas 90 degrees and use horizontal polarization.

D. Increase the power output of the radios using firmware 10.10T or greater.



Answer: B



Question 19.

Your ITCertKeys trainee wants to know how many authentication servers can be 
configured on the Access Point. What will your reply be?



A. 1

B. 2

C. 3

D. 4

E. 5



Answer: D



Reference:

aironet 1200 configuration guide



Question 20.

You have been instructed by the network administrator at ITCertKeys to set up a 
user through User Manager on the Access Point Menu screen. Which of the 
following rights will that user need if the network is a SNMP community with 
read-only privileges? (Choose all that apply.)



A. Indent

B. Write

C. SNMP

D. Read

E. Admin

F. Firmware



Answer: C, E



Explanation:

Configuring SNMP Community Access to configure specific access rights and 
privileges to an SNMP community, select the “access” menu option from the 
Communities menu and then select the appropriate option: “read” or “write.” The 
“read” option supports gets and get-next SNMP requests from readable variables. 
The “write” options supports set, gets, and get-next on all available variables. 
The default configuration is for all SNMP communities to have “read” access 
only.



Question 21.

Which of the following statements regarding Cisco’s server-based authentication 
process is true?



A. It is a one-way authentication process from client to server.

B. It is a one-way authentication process from server to client.

C. It is mutual authenticating process between server and client.

D. The authentication method is dependent upon which 802.11 authentication

method is used (open vs. shared key).

E. It is an independent one-way authentication process that vacillates between 
server

and client.



Answer: C



Reference:

Cisco WLAN PowerPoint



Explanation:

Mutual Authentication

When using 802.1x and EAP, you should use some form of mutual authentication. 
This will make the client and the authentication servers mutually authenticating 
end-points and will assist in the mitigation of attacks from man in the middle 
types of devices.



Question 22. 

The maximum transmission speed of 802.11b is 11Mbps?



A. True 

B. False



Answer: A



Explanation:

802.11b access speed ranging from 1 Mbps up to 11 Mbps. 802.11b supports the 
original

802.11 data rate of 2 Mbps as well as higher speeds up to 11 Mbps.



Question 23. 

802.11 provides 1 or 2 Mbps transmission.



A. True 

B. False



Answer: A



Explanation:

802.11 =>1 Mbps and 2 Mbps

802.11b =>5.5 Mbps and 11 Mbps.



Question 24.

What is the wireless medium of a Cisco Aironet 350 Series Client Adapter?



A. DSSS

B. FHSS

C. BSS

D. GWAP



Answer: A



Explanation:

These adapters are designed for DSSS technology and operate at 2.4 GHz.

All Cisco wireless client adapters comply with the IEEE 802.11b standard.



Question 25.

What are two basic components needed for Fast Roaming? (Choose two)



A. WLSE

B. Cisco Access Registrar

C. WDS enabled Access Point

D. Cisco Compatible Client (V2)



Answer: C, D

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