Wireles

Question 1

is a measurement of radiated output power from an ideal isotropic antenna in a single direction.

Answer 1

Effective Isotropic Radiated Power [EIRP]

Question 2

is a measurement of how well your device can hear a signal from an access point or route

Answer 2

Received Signal Strength Indicator [RSSI]

Question 3

the power ratio between the signal strength and the noise level

Answer 3

Signal-to-Noise Ratio

Question 4

focus the RF energy in one direction

Answer 4

Directional antennas

Question 5

are often formed in the shape of a thin cylinder. It sends the signal away from the cylinder in all directions except along the cylinder’s length

Answer 5

Omnidirectional antennas

Question 6

Type of Directional Antenna

Answer 6

1. Patch Antenna - features a flat rectangular design
2. Yagi-Uda Antenna - Outer case is cylindrical
3. Dish Antenna - designed to carry over the RF signal over very long communications distances

Question 7

Type of Omnidirectional Antenna

Answer 7

1. Dipole Antenna - can be folded up or down
2. Collinear

Question 8

is a unit of measurement that describes how much power an antenna transmits in a single direction when compared to an isotropic radiator

Answer 8

Decibels relative to isotropic (dBi)

Question 9

the comparison of gain or increase in power of antenna when compared to an dipole antenna.

Answer 9

Decibels dipole (dBd)

Question 10

APs that managed individually

Answer 10

Autonomous AP

Question 11

AP which requires a Wireless LAN Controller (WLC

Answer 11

Lightweight APs

Question 12

Client-Serving Cisco AP Modes

Answer 12

1. Local mode - provides the BSSs and allows client devices to be associated with the wireless LANs.
2. FlexConnect AP mode enables switching traffic between an SSID and a VLAN locally if the CAPWAP to the WLC is down, even when the AP is at a remote site
3. Bridge Mode or Mesh Mode - An AP in bridge mode becomes a dedicated point-to-point or point-to-multipoint bridge between networks.

Question 13

Wireless frame types

Answer 13

1. Data Frames - frames the contain data
2. Control Frames - Used to acknowledge when data frames are received
3. Management Frames - User for joining and leaving wireless cell

Question 14

Type of management frames. Contains information about the network. [SSID, Channel, Rules]

Answer 14

Beacon Frames

Question 15

mac-address or physical address of the access point

Answer 15

Basic Service Set Identifier - BSSID

Question 16

virtual carrier-sensing mechanism used with wireless network protocols such as IEEE 802.11 (Wi-Fi) and IEEE 802.16 (WiMax).

Answer 16

network allocation vector (NAV)

Question 17

closed group of devices consist of a central wireless source and its clients that get service from this central source, that can communicate with 802.11 wireless standard

Answer 17

Basic Service Set (BSS)

Question 18

string logical name that is advertsed by Access Point

Answer 18

Service Set Identifier (SSID)

Question 19

combining one more Access Point in a swicthed network is called

Answer 19

Extended Service Set (ESS)

Question 20

) is a protocol that enables an access controller to manage a collection of wireless termination points.

Answer 20

CAPWAP (Control and Provisioning of Wireless Access Points)

Question 21

is a measurement of how well your device can hear a signal from an access point or router

Answer 21

Received Signal Strength Indicator (RSSI)

Question 22

Troubleshooting Wireless Approaches

Answer 22

1. Bottom-Up
2. Top-Down
3. Divide and Conquer
4. Follow the path

Question 23

Wireless Authentication Options

Answer 23

-Pre-shared key
-Extensible Authentication Protocol (EAP)
-Web Authentication