Wireless Networking Flashcards
(25 cards)
What is the IEEE 802.11 standard?
A set of communication standards for wireless LANs (WiFi).
What does 802.11a support?
5 GHz band, up to 54 Mbps, uses OFDM.
What does 802.11b support?
2.4 GHz band, up to 11 Mbps, uses CCK modulation.
What is 802.11g?
Uses OFDM in 2.4 GHz, backwards compatible with 802.11a/b.
What is 802.11n known for?
Supports both 2.4 GHz and 5 GHz, uses MIMO technology.
What is 802.11ac?
Operates on 5 GHz, faster speeds than 802.11n, supports higher throughput.
What is 802.11ax?
Also known as Wi-Fi 6, uses OFDMA, supports all frequency bands, better efficiency.
What is OFDM?
Orthogonal Frequency Division Multiplexing, splits signal into sub-signals.
What is MIMO?
Multiple Input Multiple Output, uses multiple antennas to increase throughput.
What are the two main WLAN frequency bands?
2.4 GHz and 5 GHz.
What is the benefit of 2.4 GHz?
Longer range but lower speed; more prone to interference.
What is the benefit of 5 GHz?
Higher speed and less interference but shorter range.
How many channels does 2.4 GHz have?
14 channels, overlapping except 1, 6, and 11.
How many non-overlapping channels does 5 GHz have?
23 non-overlapping channels.
What is a WLAN?
Wireless Local Area Network, usually Wi-Fi.
What is a PAN?
Personal Area Network, short-range, e.g., Bluetooth.
What is a MAN?
Metropolitan Area Network, spans city or campus.
What is a WAN?
Wide Area Network, spans country or globe; e.g., Internet.
What is infrastructure mode?
Devices connect through an access point.
What is ad hoc mode?
Devices connect directly Peer-to-Peer
What is Wi-Fi Direct?
An enhanced ad hoc mode with added features. For printer mibile phone connections etc.
What is a SSID?
Service Set Identifier, the name of a wireless network.
What is a BSSID?
Basic Service Set Identifier, MAC address of the AP.
What is a BSS?
Basic Service Set, devices connected through one AP.
