Networking 2.3 - Protocols for wireless networking

Question 1

Infrastructure mode allows wireless computers to connect to the

Answer 1

LAN, WAN or internet

Question 2

Ad hoc computers can access each other but not the

Answer 2

resources on the LAN, WAN internet

Question 3

APIPA is used only if a _________ server isn’t found

Answer 3

DHCP

Question 4

You should consider 3 factors when implementing a long-range wireless network

Answer 4

Power considerations
Regulatory requirements
Antenna type

Question 5

licensed & unlicensed (long range fixed wireless)
FCC

Answer 5

Wireless devices use radio frequencies

Licensed = frequencies between 300 Megahertz (Mhz) and 6 Gigahertz (GHz) provides the optimal communications for modern data transmissions. The Federal Communications Commission (FCC) has licensed radio frequencies within this range to different users and organizations for a fee for the exclusive right to transmit on their assigned frequency within a geographic area in return for no interference

Unlicensed = organizations can choose to still use airwaves without consulting the FCC. Currently there are very few bands that can be utilized by unlicensed groups, which often results in interference occurring from other unlicensed groups using the same frequencies.

Whenever implementing a wireless network, it is important to understand what frequencies you will be using (cost vs performance)

Question 6

When you implement an access point, you can configure several settings eg (3)

Answer 6

MAC filtering = allow or deny connections based on the MAC address of the connecting device

Disabling the SSID broadcast = ensure that the SSID is not broadcasting, thereby making it a bit more difficult to connect to the wireless network

The encryption method = ensure that the password for the wireless network is protected. WPA2 is more secure than WPA, which is more secure than WEP.

Question 7

The maximum data transmission speed for Bluetooth is

Answer 7

3 Mbps
(2.4 GHz to 2.485 GHz)

Question 8

The operating range for Class 2 Bluetooth devices is up to

Answer 8

10 meters or 33 feet at the maximum transmission speed

Question 9

802.11a

Answer 9

5 GHz
up to 54 Mbps
legacy

Question 10

802.11b

Answer 10

2.4 GHz
up to 11 Mbps
known as the Instrumentation, Scientific, and Medical (ISM) frequency band
legacy

Question 11

802.11g

Answer 11

2.4 GHz
up to 54 Mbps
legacy

Question 12

802.11n (WiFi 4)

Answer 12

2.4 GHz or 5 GHz
up to 600 Mbps
frequently marketed as 802.11b/g/n.

Question 13

802.11ac (WiFi 5)

Answer 13

5 GHz
up to 1,300 Mbps (1.3 Gbps) in 5 GHz with multiple access points

Question 14

802.11ax (WiFi 6)

Answer 14

2.4 GHz, 5 GHz, or 6 GHz
up to 9.6 Gbps, commonly 600 Mbps

Question 15

For the 2.4 GHz band, you also need to consider which channels are non-overlapping. The non-overlapping channels are

Answer 15

1, 6, 11, and 14

Question 16

2.4 GHz v 5GHz

Answer 16

2.4 GHz
Larger coverage area
Better at penetrating solid objects
Lower data rate
More prone to interference
Usually more devices using this frequency

5 GHz
Higher data rate
Less prone to interference
Usually fewer devices using this frequency
Smaller coverage area (except 802.11 ac)
Worse at penetrating solid objects