802.11 Standards: Bandwidth Comparison
Question
A network technician is configuring a wireless network at a branch office.
Users at this office work with large files and must be able to access their files on the server quickly.
Which of the following 802.11 standards provides the MOST bandwidth?
A.
a B.
ac C.
g D.
n.
B.
Explanations
A network technician is configuring a wireless network at a branch office.
Users at this office work with large files and must be able to access their files on the server quickly.
Which of the following 802.11 standards provides the MOST bandwidth?
A.
a
B.
ac
C.
g
D.
n.
B.
The correct answer is B. ac.
802.11 standards are a set of wireless network protocols that define the specifications for wireless LAN (WLAN) communications. Each standard uses a different frequency band and modulation scheme to provide different levels of bandwidth and range.
a: This standard operates in the 5 GHz frequency band and can provide up to 54 Mbps of data transfer rate. It uses orthogonal frequency division multiplexing (OFDM) modulation scheme. It was the first wireless standard to provide high-speed wireless connectivity.
b: This standard operates in the 2.4 GHz frequency band and can provide up to 11 Mbps of data transfer rate. It uses direct-sequence spread spectrum (DSSS) modulation scheme. This standard is rarely used today due to its low data transfer rate.
g: This standard operates in the 2.4 GHz frequency band and can provide up to 54 Mbps of data transfer rate. It uses OFDM modulation scheme. It is backward compatible with the b standard.
n: This standard operates in both the 2.4 GHz and 5 GHz frequency bands and can provide up to 600 Mbps of data transfer rate. It uses multiple-input multiple-output (MIMO) technology, which allows for the use of multiple antennas to improve signal quality and increase data transfer rate.
ac: This standard operates in the 5 GHz frequency band and can provide up to 6.9 Gbps of data transfer rate. It uses the MIMO technology and uses wider channels than the n standard to provide more bandwidth. This standard is also backward compatible with the a, n, and g standards.
In summary, the ac standard provides the most bandwidth among the 802.11 standards, making it the best option for users who need to access large files quickly over a wireless network.
