2.4 - Compare and contrast wireless networking protocols (including 802.11 standards). Flashcards
2.0 - Networking
802.11a
5GHz , 54Mbit/s, 20MHz.
802.11b
2.4GHz , 11Mbit/s, 22MHz.
802.11g
2.4GHz , 54Mbit/s, 20MHz.
802.11n
5GHz or 2.4GHz, 4MIMO, 150Mbit/s per stream, 600Mbit/s total.
20MHz or 40MHz (two contiguous 20MHz bonded channels).
802.11ac
5GHz , 8 MU-MIMO , 866.7Mbit/s per stream , ~6.8Gbit/s total.
40MHz, 80MHz or 160MHz.
Frequency
2.4GHz or 5GHz and sometimes both
Channels
Group of frequencies, numbered by the IEEE, Non-overlapping channels would be necessary.
1-11.
Bandwidth
Amount of frequency in use.
20MHz, 40MHz, 80MHz, 160MHz.
Bluetooth
High speed communication over short distances.
PAN - Personal area network.
Connects our mobile devices.
NFC
Near Field Communication.
Two way wireless communication.
Payment systems
- Credit cards etc.
NFC helps with Bluetooth pairing.
Short range with encryption support.
RFID
Radio Frequency Identification.
Access badges, inventory tracking.
Radar technology.
Radio energy transmitted to the tag.
RF powers the tag, ID is transmitted back.
Zigbee
Internet of things networking.
Alternative to Wifi and Bluetooth
Longer distance than bluetooth less power consumption that Wifi.
Uses the ISM band.
900MHz and 2.4GHz frequencies in the US.
Z-Wave
Proprietary home automation networking
Internet of Things (IoT)
Control lights, locks, garage doors, etc.
Uses the ISM band
900 MHz frequencies in the US
No conflicts with 802.11
4G and LTE
Long Term Evolution (LTE)
Converged standard (GSM and CDMA providers)
Based on GSM and EDGE (Enhanced Data Rates for GSM Evolution)
Supports download rates of 150Mbit/s
LTE Advanced (LTE-A) Supports download rates of 300Mbit/s
