IMM New Question

Dynamic Frequency Selection Channels

When a DFS–enabled radio is operating on one of the following channels, the wireless device uses DFS to monitor the operating frequency and switch to another frequency or reduce power as necessary:

•           52 (5260 MHz)

•           56 (5280 MHz)

•           60 (5300 MHz)

•           64 (5320 MHz)

•           100 (5500 MHz)

•           104 (5520 MHz)

•           108 (5540 MHz)

•           112 (5560 MHz)

•           116 (5580 MHz)

•           120 (5600 MHz)

•           124 (5620 MHz)

•           128 (5640 MHz)

•           132 (5660 MHz)

•           136 (5680 MHz)

•           140 (5700 MHz)

NEW 1:

What is max power for an AP for all regulatory bodies ? ( Or something close to that )

1)10

2)8

3)1

4)X

Answer: 3

Explanation: A value of 1 corresponds to the maximum power level that is allowed in the AP’s regulatory domain. (Chapter 13 of certification guide) (Double Checked by guilherme1846)

NEW 2:

What is the deployment that requires least amount of hardware installed on the site:

1)Cloud

2)Converged

3)Centralized

4)….

Answer: 1 (Double Checked by guilherme1846)

NEW 3:

What command can be used on the WLC to show the logs (or something) for an AP with the name Cisco_AP ?

1)show logging
2)show ap eventlog Cisco_AP
3) x
4) x

Answer: Don’t remember the other two options. I chose option 2, I think it’s the correct one

NEW 4:

What is the command used to debug an AP that is not able to join the WLC ?:

1)debug capwap events enable (on the WLC)
2)debug capwap events enable (on the AP)
3) x
4) x

Answer: Don’t remember the last two options, but I’m sure it’s choice No.1

NEW 5:

What are the channels you need to avoid not to have interference with DFS channels ?

1) 52

2) 136

3) 124

4) 161

5) something less than 50

Answer: I chose 52,136,124. Make sure you know what are the DFS Channels.

NEW 6:

What is required from the deployment when using voice or video applications, choose 3: (Something like that)

1) RSSI cell edge of -25
2) RSSI cell edge of -16
3) SNR of 25 ……
4) Cell Overlap of 20%

5) RSSI -67

Answer: 3,4,5

NEW 6:

What are the sources of interference you will find when conducting a site survery before deployment(Something like that)?

1-Bluetooth Headset
2-Microwave Ovens
3-Analog Wireless Camera
4-AdHoc Wireless Camera
5-AdHoc Hotspot

Answer: 2,3,5

NEW 7:

what are reqs for VoWLAN:

A) RSSI -67

B) SNR 25

C) 20% overlapping cells (not sure it’s true),

Answer: A,B,C

NEW 8:

what is SNR needed for 54 Mbps (data, voice – no remember)

A) SNR 25

Answer: A

NEW 9:

what is max level in Cisco WLC TPC for all regulatory domain

A) Power Level 1

Answer: A

Explanation: A value of 1 corresponds to the maximum power level that is allowed in the AP’s regulatory domain. (Chapter 13 of certification guide) (Double Checked by guilherme1846)

New 10:

Engineer needs an LAP to support few WLANs with different DHCP servers for different SSIDs, how to

fulfill this requirement?

A. configuring dynamic VLAN interfacesto SSIDs in AP group.

B. configure DHCP in AP settings advanced page

C. xxx

D. xxx

Answer:  I chose A. It should be correct.

New 11:

Which wireless survey you do considering the "infrastructure" in the building?

A. Passive

B. Active

C. Planning

D. xxx

Answer: I chose C. i guess it is wrong.

New 12:

What are the minimum requirements to operate cisco 7925 wireless phone.(choose 3)

A. RSSI -67

B. SNR 25

C. 20% cell overlapping

D. xxx

Answer: I chose A,B,C. It should be correct.

New 13:

Which WLC menu you use the check the assigned power level of an AP.

A. Wireless

B. Management

C. Controller

D. Monitor.

Answer: A

Explanation: (Double check by guilherme1846 according chapter 13 from Certification Guide)

New 14:

How much wireless cell overlapping is required for 5GHz voice and data roaming.

A. 5%

B. 10%

C. 15%

D. 20%

Answer: D

Explanation: How much should cells overlap each other to promote good roaming? Cisco recommends

10–15 percent overlap for most data applications and 15–20 percent overlap for voice.

(Double checked by guilherme1846 according chapter 7 from certification guide)

New 15:

What interference you will see when conducting a site survery (Choose 3)-similar Q in Doc file.

A. Microwave Ovens

B. Analog Wireless Camera

C. AdHoc Hotspot

D. Bluetooth link

E. xxx

Answer: I chose A,B,C. It should be correct.

New 16:

Which CLI command you use in WLC to update the running IOS.

Answer: I chose the one with "TFTP" in the answer. all other 3 seemed not correct.

·  Issue the transfer download mode tftp command in order to define the mode of file transfer.

·  Issue the transfer download serverip TFTP_server_IP_address command in order to define the TFTP server IP address.

·  Issue the transfer download path 'TFTP_server_path' command in order to define the path of the TFTP default directory where the controller OS software is located.

·  Issue the transfer download filename filename command in order to specify the name of the image.

Here is an example:

(Cisco Controller) >transfer download datatype code 

(Cisco Controller) >transfer download mode tftp 

(Cisco Controller) >transfer download serverip 10.77.244.196 

(Cisco Controller) >transfer download path . 

(Cisco Controller) >transfer download filename AIR-WLC4400-K9-5-2-178-0.aes

New 17:

How much SNR needed to reach 54Mbps in 802.11g network?

A. 25

B. 10

C. XX

Answer: I Chose A. (Higher SNR better throughput, so I think 25 it’s the correct one)

Data rate               minimum Signal       minimum SNR
54 Mbps                       -71dBm                      25 dB
36 Mbps                       -73dBm                      18 dB
24 Mbps                       -77dBm                      12 dB
10/11 Mbps                  -82dBm                      10 dB
6/5.5 Mbps                   -89dBm                      8 dB

New 18:

Which software you can use to do both active and passive site surveys?

A. Fluke networks Airmagnet Pro

B. Fluke networks Airmagnet lite (or something like that)

C. Cisco spectrum analyzer

D. xxx

Answer: I chose A. Not sure.

New 19:

How Cisco spectrum analyzer analyse the scanned data (something like that)

A. Store scanned data during wifi scan and analyze later.

Answer: I chose A, not sure. dont remember other choices.

New 20:

Some new question about Anchor controller. Sorry dont remember.