Installing a Wireless Network

Question 1

Name the two installation types, or service sets

Answer 1

ad hoc and infrastructure modes

Question 2

What is an IBSS and give an example?

Answer 2

Independent Basic Service Set. An example of this would be two wireless laptops setup in ad hoc mode that communicate directly with each other.

Question 3

What is the BSA?

Answer 3

Basic Service Area. It’s the area managed by a wireless AP

Question 4

What is a distribution system and what is it also known as?

Answer 4

The connection to the wired network from an AP. AKA Wireless bridging

Question 5

If you configure multiple APs with the same SSID, what are you creating?

Answer 5

An Extended Service Set.

Question 6

SSID stands for what?

Answer 6

Service Set Identifier.

Question 7

If you want to be able to let users roam throughout the wireless network without losing their connection, what is the minimum percentage of overlap between AP? And how should you set the channels?

Answer 7

10%. Channels between each AP BSA should set as far apart as possible

Question 8

What wireless device allows for easier design and implementation? How?

Answer 8

WLAN controllers. By allowing an admin to manage multiple AP’s from a single device.

Question 9

What feature could you implement on a wireless network to reduce overloading? What does it do?

Answer 9

VLAN pooling. Partitions the wireless broadcast domain into smaller broadcast domains

Question 10

What is split MAC?

Answer 10

Is the solution wherein the management part of an AP is split off and managed by a separate device.

Question 11

What two protocols do the WLAN controller use to communicate with it’s “thin-APs”?

Answer 11

Lightweight Access Point Protocol (Cisco) or

CAPWAP (Control and Provisioning of Wireless Access Points)

Question 12

List the key factors that affect signal strength

Answer 12

1) Distance
2) Walls and other barriers
3) Protocols Uses
4) Interference

Question 13

What range do Personal Area Networks usually operate within?

Answer 13

30 feet

Question 14

List 3 types of PANs

Answer 14

1) Bluetooth
2) IR
3) NFC (Near Field Communication)

Question 15

What wireless protocol uses a mesh network using low-energy radio waves to communicate from appliance to appliance?

Answer 15

Z-wave

Question 16

Which wireless protocol is typically for sensor data?

Answer 16

Ant+

Question 17

What are the 6 common configuration settings you would configure on a new AP?

Answer 17

1) SSID
2) AP IP Address
3) Operating Mode (Access Point or Bridge)
4) Password
5) Wireless Channel
6) Security

Question 18

What is a shared key?

Answer 18

A human readable passphrase

Question 19

What 3 steps should be carried when deploying a WLAN?

Answer 19

1) Information gathering
2) Pre-deployment survey
3) Post-deployment survey

Question 20

What are the 3 key factors to identify at the Information Gathering stage of planning a WLAN deployment?

Answer 20

1) PHYSICAL SCOPE and expected capacity at each location
2) NETWORK SCOPE - inc applications used, data and sensitivty
3) TYPES of wireless devices that will be used

Question 21

Placing APs around a site to verify optimal distances is part of what step in WLAN planning/deployment?

Answer 21

Predeployment site survey

Question 22

Why is it NOT a good idea to position multiple APs with minimum overlap with each other?

Answer 22

It uses more power as you’re using the maximum distance which reduces fault tolerance

Question 23

How could you prevent bleed from one floor to another?

Answer 23

By using semi-direction or patch antennas

Question 24

What two indicators can help to determine the data rate that must be attained in a particular WLAN area once you know exactly the type of communications and activity a WLAN will need to support?

Answer 24

1) RSSI (received signal strength indicator)

2) SNR (signal to noise ratio)

Question 25

If several hosts are connecting to a wireless AP what operating mode would be being used?

Answer 25

Infrastructure mode / BSS

Question 26

Which type of antenna suits connecting wireless APs between buildings?

Answer 26

Dish / Yagi Antennas / parabolic (point to point)

Question 27

what topology does an AP that connects to a wired network and forwards transmissions of connected wireless clients back and forth between the wireless and wired network?

Answer 27

Infrastructure topology

Question 28

Which of the following tools would of help in troubleshooting wireless signal loss

a-protocol analyzer
b- WAP power level controls
c-logical network diagram
d-network mapper

Answer 28

b- WAP power level controls