Network+ Wireless Networking Standards Flashcards

Which 802.11 standard was the first to support both 2.4 GHz and 5 GHz bands simultaneously?

Answer: 802.11n

802.11n was the first dual-band standard, capable of operating on both 2.4 GHz and 5 GHz bands.

A company deploys 802.11ac APs. A client device only supports 802.11n. What will happen when that client associates?

Answer: The client connects at 802.11n speeds

802.11ac is backward compatible with 802.11n; the client will associate and communicate at the highest speed both devices support (802.11n rates).

What is the channel width used by 802.11ac that enables it to achieve throughput exceeding 1 Gbps?

Answer: 80 MHz and 160 MHz

802.11ac supports 80 MHz and optional 160 MHz channel widths, which are key to achieving multi-gigabit theoretical throughput.

Which wireless technology uses frequency hopping across the 2.4 GHz ISM band and is associated with early Bluetooth versions?

Answer: FHSS

Frequency Hopping Spread Spectrum (FHSS) rapidly switches frequencies across the band; early 802.11 and Bluetooth both used this technique.

A wireless survey reveals a network using 22 MHz-wide channels on 2.4 GHz. Which standard is this?

Answer: 802.11b

802.11b uses 22 MHz-wide channels in the 2.4 GHz band, which is why only 3 non-overlapping channels exist on 2.4 GHz.

Wi-Fi 6E differs from Wi-Fi 6 primarily because it adds support for which frequency band?

Answer: 6 GHz

Wi-Fi 6E extends 802.11ax into the 6 GHz band, providing up to 1,200 MHz of additional spectrum largely free of legacy device interference.

Which 802.11 feature allows an access point to form a wireless backhaul with other APs to extend network coverage without wired uplinks?

Answer: WDS (Wireless Distribution System)

WDS allows APs to bridge wirelessly to each other, enabling mesh-like coverage extension without needing Ethernet runs to every AP.