Flashcards in ch.8.pgs.331-342.js Deck (16):
What is (WLAN)?pg.332
Wireless LAN. Created standards and managed by Institute of Electrical and Electronics Engineers (IEEE).
802.11 networks use Carrier Sense Multiple Access/Collision Avoidance(CSMA/CA) instead of Ethernet's Carrier Sense Multiple Access/Collision Detection (CSMA/CD). T or F pg332
802.11a standard provides WLAN bandwidth of up to ___Mbps in the ___GHz frequency spectrum.pg332
54 Mbps, 5GHz, pg.332
802.11b and 802.11a standards are not incompatible. Tor F pg333
True. Because frequency and modulation. 802.11b operates 2.4 GHz and 802.11b at 5GHz.
802.11g standard using what frequency spectrum ___,.
OFDM or DSSS encoding. pg.333
Devices on the market that can operate with both 802.11b and 802.11g standards are labeled as ____. pg
802.11b/g. pg 333
802.11n ratified in 2010 support bandwidth up to ____ but reality the typical throughput is about ___ to ____.pgs334
600 Mbps, 300 Mbps to 450 Mbps.
802.11 ac can bond up ___ for a ___ bandwidth.pg335
eight, 160MHz. It doubles the MIMO capabilities of 802.11n to eight streams.pg.335
The most important new feature of 802.11ac is ____.pg336
beamforming, can allow for range increases sending signal to specific direction.pg336
What is FHSS.pg337
Frequency-hopping spread spectrum. It communicates by hopping transmissions over a range of frequencies.pg337
What is DSSS pg.338
Direct-sequence spread spectrum. done by adding the data to be transmitted to a higher-speed transmission.pg338
What is OFDM.pg338
Orthogonal frequency division multiplexing. Communicates by breaking data into subsignals and transmits them simultaneously.pg338
What is one of the first security standards for wireless devices.pg.339
Wired Equivalent Privacy (WEP).pg339
What is WPA2? pg 340
Wi-Fi Protected Access2. It uses the required 802.11i standards and also Counter Mode CBC-MAC Protocol(CCMP) based on Advanced Encryption Standard(AES).pg340
What is DSL?pg
Digital Subscriber Line. pg345 Many people moved from ADSL to VDSL because of the 52Mbps downloads and 16Mbps uploads. SPEED!!!!