Chapter 7: Wireless and SOHO Networks

Question 1

802.11 networks use the ____ access method to avoid packet collisions and react to a collision when it happens.

Answer 1

CSMA/CA or Carrier Sense Multiple Access/ Collision Avoidance

Question 2

The Federal Communications Commission has defined ____ different 22 MHz communications channels for the 2.4 GHz wireless frequency. However, you can only configure your wireless networking devices to the first ____.

Answer 2

14, 11

Question 3

If you need to use three non-overlapping channels in the 2.4 GHz frequency, your only choices are ____.

Answer 3

1, 6, and 11

Question 4

802.11b
Frequency:
Max Output:
Modulation:

Answer 4

Frequency: 2.4 GHz
Max Output: 11 Mbps
Modulation: DSSS

Question 5

802.11a
Frequency:
Max Output:
Modulation:

Answer 5

Frequency: 5 GHz
Max Output: 54 Mbps
Modulation: OFDM

Question 6

802.11g
Frequency:
Max Output:
Modulation:

Answer 6

Frequency: 2.4 GHz
Max Output: 54 Mbps
Modulation: DSSS/OFDM

Question 7

802.11n
Frequency:
Max Output:
Modulation:

Answer 7

Frequency: 5 GHz/2.4 GHz
Max Output: 600 Mpbs
Modulation: OFDM/DSSS

Question 8

802.11ac WiFi 5
Frequency:
Max Output:
Modulation:

Answer 8

Frequency: 5 GHz
Max Output: 6.9 Gbps
Modulation: OFDM

Question 9

802.11ax WiFi 6
Frequency:
Max Output:
Modulation:

Answer 9

Frequency: 5GHz/2.4GHz
Max Output: 9.6 Gbps
Modulation: OFDMA

Question 10

Bluetooth uses the ____ frequency for communication.

Answer 10

2.4 GHz

Question 11

Most Bluetooth devices are Class ____ devices.

Distance:
Power Usage:

Answer 11

2

Distance: 10 m
Power Usage: 2.5 mW

Question 12

____ is a communications standard that uses LF, HF, and UHF radio waves to facilitate communication. A/An ____ is made of three components: tag, reader, and antenna.

Answer 12

RFID or Radio Frequency Identification

Question 13

____ is a subset of RFID and is a very short distance technology. It is designed to facilitate information sharing and contactless payment.

Answer 13

NFC or Near-Field Communication

Question 14

NFC

Frequency:

Answer 14

13.56 MHz (HF RFID)

Question 15

Firewall ____ allows traffic to enter the network on a specific port after a computer makes an outbound request on that specific port.

Answer 15

port triggering

Question 16

A/An ____ (or allow list) allows access to nobody (so its default deny) except those users or computers on the ____.

Answer 16

whitelist

Question 17

A/An ____ (or block list) allows access to everyone (default allow) except those on the ____.

Answer 17

blacklist

Question 18

____ translates a group of private addresses to a pool of routable addresses. This is used to make a resource that’s on a private network available for consumption on public networks by appearing to give it a publicly available address.

Answer 18

DNAT or Dynamic Network Address Translation