Final answer:
Because 80 MHz channels in 802.11ac offer better performance and less interference than 160 MHz channels, a company may decide to use them instead. While data link layer standards control how data frames are organized and transmitted, physical layer standards control data transmission. Layer 1 issues include multipath interference, wireless propagation issues, and MIMO; Layer 2 issues include media access control, frame conversion, and roaming.
Step-by-step explanation:
For a variety of reasons, an organization may choose to employ 80 MHz channels in 802.11ac rather than 160 MHz channels. One explanation is that in crowded or congested environments, using 80 MHz channels helps to ensure better performance by reducing interference. A larger block of contiguous spectrum is needed for 160 MHz channels, but this block might not be available everywhere. Utilizing 80 MHz channels can also contribute to increased network dependability and stability.
a) Physical layer standards govern the physical transmission of data, including the use of frequencies, modulation techniques, and transmission power.
b) Data link layer standards govern the organization and transmission of data frames between network devices, including error detection and correction, flow control, and access control.
c) Multipath interference is a Layer 1 concern, as it relates to the physical transmission of signals and the potential for signal reflections or interference from other sources.
d) Media Access Control (MAC) is a Layer 2 concern, as it involves protocols and mechanisms for controlling access to a shared network medium.
e) Multiple Input Multiple Output (MIMO) is a Layer 1 concern, as it involves the use of multiple antennas to improve signal quality and increase data throughput.
f) Converting between 802.11 frames (wireless) and 802.3 frames (wired Ethernet) is a Layer 2 concern, as it involves the translation and encapsulation of data between the two protocols.
g) Wireless propagation problems are a Layer 1 concern, as they involve the physical transmission of wireless signals and factors such as signal attenuation, interference, and range limitations.
h) Roaming is a Layer 2 concern, as it involves the seamless handoff of a wireless connection between access points within a network without interrupting the user's connection.
i) 802.11ac is a wireless networking standard that operates in the 5 GHz frequency band, providing higher speeds and improved performance compared to previous standards.