Wireless Network Standards

Question 1

What is the 802.11a standard?

Answer 1

802.11a operates at 5 GHz with a maximum speed of 54 Mbps and a shorter range compared to 2.4 GHz standards.

Question 2

What is the 802.11b standard?

Answer 2

802.11b operates at 2.4 GHz with a maximum speed of 11 Mbps and a longer range than 5 GHz standards.

Question 3

What is the 802.11g standard?

Answer 3

802.11g operates at 2.4 GHz with a maximum speed of 54 Mbps, similar to 802.11a but with a longer range.

Question 4

What is the 802.11n (WiFi 4) standard?

Answer 4

802.11n operates at both 2.4 GHz and 5 GHz with a maximum speed of 600 Mbps, using MIMO technology for better performance.

Question 5

What is the 802.11ac (WiFi 5) standard?

Answer 5

802.11ac operates at 5 GHz with a maximum speed of 3.46 Gbps, utilizing MU-MIMO for improved performance in crowded networks.

Question 6

What is the 802.11ax (WiFi 6) standard?

Answer 6

802.11ax operates at both 2.4 GHz and 5 GHz with a maximum speed of 9.6 Gbps, offering improved efficiency, capacity, and performance in dense environments.

Question 7

What are the 2.4 GHz and 5 GHz frequencies used for?

Answer 7

2.4 GHz: Longer range, more interference, fewer channels.
5 GHz: Shorter range, less interference, more channels.

Question 8

What are the regulatory impacts on channels?

Answer 8

Regulatory impacts include restrictions on the use of certain frequencies and channels to prevent interference with other devices and services.

Question 9

What is channel bonding?

Answer 9

Channel bonding combines two or more adjacent channels to increase the bandwidth and improve data transfer rates

Question 10

What is a Service Set Identifier (SSID)?

Answer 10

An SSID is the name of a wireless network, allowing devices to identify and connect to the network.

Question 11

What are Basic Service Set (BSS) and Extended Service Set (ESS)?

Answer 11

BSS: A single access point and its connected devices.

ESS: Multiple access points and their connected devices within the same SSID.

Question 12

What is an Independent Basic Service Set (IBSS) or Ad-hoc network?

Answer 12

IBSS or Ad-hoc is a wireless network where devices connect directly to each other without an access point.

Question 13

What is roaming in wireless networks?

Answer 13

Roaming allows devices to move between access points within the same ESS without losing connection.

Question 14

What are the types of antennas?

Answer 14

Omni: Radiates signal in all directions.

Directional: Focuses signal in a specific direction for longer range.

Question 15

What are WiFi Protected Access (WPA) and WPA2 encryption standards?

Answer 15

WPA/WPA2 Personal: Uses AES or TKIP for encryption, suitable for home networks

WPA/WPA2 Enterprise: Uses AES or TKIP with additional authentication, suitable for business networks.

Question 16

What are the major cellular technologies?

Answer 16

CDMA: Code-Division Multiple Access.

GSM: Global System for Mobile Communications.

LTE: Long-Term Evolution.

3G, 4G, 5G: Different generations of cellular network technology, with increasing speed and capacity.

Question 17

What is Multiple Input, Multiple Output (MIMO) and Multi-User MIMO (MU-MIMO)?

Answer 17

MIMO: Uses multiple antennas to improve communication by sending and receiving multiple data streams.

MU-MIMO: Allows multiple devices to receive data simultaneously, improving network efficiency and performance.