WLANs

Question 1

Ad-Hoc Mode

Answer 1

no access to the internet or local area network; just connecting together

Question 2

Mesh Topology

Answer 2

Uses a combination of different wireless networks such as wifi, microwave, cellular, and more

Question 3

Site Survey

Answer 3

Wireless survey used to determine coverage areas and produce a coverage heat map

Question 4

Range Extender

Answer 4

Specialized device that overcomes distance limitations of wireless networks

Question 5

Omnidirectional Antenna

Answer 5

Radiates power equally in all directions (circle)

Question 6

Unidirectional

Answer 6

Focuses power in one direction for covering greater distances

Question 7

Yagi Antenna

Answer 7

Antenna from building to building

Question 8

Parabolic Antenna

Answer 8

Like a satellite antenna

Question 9

Direct-Sequence Spread Spectrum (DSSS)

Answer 9

Modulates data over an entire range of frequencies using a series of signals known as chips

Question 10

Orthogonal Frequency Division Multiplexing (OFDM)

Answer 10

Uses a slow modulation rate with simultaneous transmissions over 52 different data streams

Question 11

Channel

Answer 11

A virtual medium through which wireless networks can send and receive data

Question 12

how many channels on 2.4 frequency?

Answer 12

11 or 14

Question 13

What channels to prevent interference?

Answer 13

1, 6 and 11

Question 14

how many channels for 5 ghz band?

Answer 14

24 non-overlapping channels

Question 15

Channel Bonding

Answer 15

Allows for the creation of a wider channel by merging neighboring channels into one

Question 16

802.11a

Answer 16

5 Ghz
54 Mbps

Question 17

802.11b

Answer 17

2.4 ghz
11 mbps

Question 18

802.11g

Answer 18

2.4 ghz
54 mbps

Question 19

802.11n (Wifi 4)

Answer 19

2.4 and 5 Ghz
150 mbps/600 mbps (MIMO)

Question 20

802.11ac (Wifi 5)

Answer 20

5 ghz
3 Gbps (MU-MIMO)

Question 21

802.11ax (Wifi 6)

Answer 21

2.4, 5 and 6 Ghz
9.6 Gbps (MU-MIMO)

Question 22

Pre-Shared Key

Answer 22

Both the access point and the client use the same encryption key

Question 23

WEP

Answer 23

Original 802.11 wireless security standard which is an insecure security protocol

Question 24

WPA

Answer 24

Replaced WEP and follows the Temporal Key Integrity Protocol (TKIP) added RC4

Question 25

WPA2

Answer 25

Created as port of 802.11i standard and requires stronger encryption and integrity checking through CCMP; uses AES

Question 26

Extensible Authentication Protocol (EAP)

Answer 26

also known as 802.1x; EAP is part of 802.1x

Question 27

MAC Address Filtering

Answer 27

Configures an access point with a listing of permitted MAC addresses (like an ACL)

Question 28

Network Access Control (NAC)

Answer 28

Permit or deny access to the network based on a device’s characteristics

Question 29

Captive Portal

Answer 29

This is the splash page at a coffee shop to get on wifi

Question 30

Geofencing

Answer 30

Uses GPS and RFID to define real world boundaries for devices

Question 31

Rogue Access Point

Answer 31

a fake access point set up to lure legitimate users to connect to it