Updated 2.3 Part 2 Flashcards
Which 802.11 standard first introduced support for 5 GHz frequency? Options: (A) 802.11b, (B) 802.11a, (C) 802.11g, (D) 802.11n
Correct Answer: (B) 802.11a. Explanation: 802.11a was the first standard to operate in the 5 GHz band.
What is the maximum speed of 802.11g? Options: (A) 11 Mbps, (B) 54 Mbps, (C) 600 Mbps, (D) 1.3 Gbps
Correct Answer: (B) 54 Mbps. Explanation: 802.11g supports up to 54 Mbps and operates on the 2.4 GHz band.
Which 802.11 standard introduced OFDMA technology? Options: (A) 802.11n, (B) 802.11ac, (C) 802.11ax, (D) 802.11g
Correct Answer: (C) 802.11ax. Explanation: Wi-Fi 6 (802.11ax) uses OFDMA to improve network efficiency.
What is the maximum frequency range for the 2.4 GHz band? Options: (A) 2.4–2.5 GHz, (B) 2.4–2.6 GHz, (C) 2.3–2.5 GHz, (D) 2.3–2.6 GHz
Correct Answer: (A) 2.4–2.5 GHz. Explanation: The 2.4 GHz band operates within this frequency range.
What is a disadvantage of the 2.4 GHz band? Options: (A) Shorter range, (B) Higher interference, (C) Less coverage, (D) Higher cost
Correct Answer: (B) Higher interference. Explanation: The 2.4 GHz band often experiences interference from other devices operating in the same range.
What frequency band is commonly used for short-range, high-speed communication? Options: (A) 2.4 GHz, (B) 5 GHz, (C) 60 GHz, (D) 900 MHz
Correct Answer: (C) 60 GHz. Explanation: The 60 GHz band provides high-speed communication over short distances.
How many non-overlapping channels are available in the 5 GHz band? Options: (A) 3, (B) 12, (C) 20, (D) 25
Correct Answer: (D) 25. Explanation: The 5 GHz band provides up to 25 non-overlapping channels under ideal conditions.
Which factor affects the number of non-overlapping channels in a frequency band? Options: (A) Signal strength, (B) Channel width, (C) Encryption type, (D) Device count
Correct Answer: (B) Channel width. Explanation: Wider channel widths reduce the number of non-overlapping channels available.
Which channel width is supported by 802.11ac for improved performance? Options: (A) 20 MHz, (B) 40 MHz, (C) 80 MHz, (D) 160 MHz
Correct Answer: (D) 160 MHz. Explanation: 802.11ac supports up to 160 MHz channel widths for faster data transfer rates.
Which type of antenna is commonly used for long-range fixed wireless? Options: (A) Omnidirectional, (B) Parabolic dish, (C) Yagi, (D) Patch
Correct Answer: (C) Yagi. Explanation: Yagi antennas are directional and ideal for long-distance communication.
What is required for successful long-range fixed wireless communication? Options: (A) High-power amplifiers, (B) Multiple routers, (C) Line of sight, (D) Fiber-optic cables
Correct Answer: (C) Line of sight. Explanation: Fixed wireless communication requires an unobstructed line of sight between antennas.
What is a key benefit of using fixed wireless instead of fiber? Options: (A) Faster speeds, (B) Easier installation, (C) Lower latency, (D) Higher reliability
Correct Answer: (B) Easier installation. Explanation: Fixed wireless is quicker and less expensive to deploy than fiber-optic networks.
What frequency bands are most commonly used in fixed wireless? Options: (A) 2.4 GHz and 5 GHz, (B) 6 GHz, (C) 60 GHz, (D) 900 MHz
Correct Answer: (A) 2.4 GHz and 5 GHz. Explanation: Both 2.4 GHz and 5 GHz are used depending on distance and interference considerations.
Which type of fixed wireless connection supports high-speed data transfer over short distances? Options: (A) 2.4 GHz, (B) 5 GHz, (C) 60 GHz, (D) 900 MHz
Correct Answer: (C) 60 GHz. Explanation: The 60 GHz band provides extremely high speeds but is limited to short distances.
