Chapter 8 P.339-351 Flashcards
The term WiFi was originally coined as a marketing name for ___________. P. 339
802.11b
IEEE stands for what P. 340
Institute of Electrical and Electronics Engineers
802.11 was ratified in…… P.340
1997
SSID stands for? P.340
service-set identifier
CSMA/CA stands for……P.340
Carrier Sense Multiple Access/Collision Avoidance
The 802.11b standard was ratified in? P.341
1999
The 802.11b and 802.11a standards are incompatible why? P.341
frequency and modulation. 802.11b operates in the 2.4GHz frequency and uses DSSS. 802.11a runs at 5GHz and uses OFDM.
the FCC has defined ____ different 22MHz communication channels. P.341
14
The 14 channels must be configured individually. (T or F) P.341
F. You can only configure the first 11.
802.11n operate in what ranges? P.342
2.4GHz and 5GHz
MIMO stands for? P.342
multiple-input multiple-output
_______ accomplishes communication by adding the data that is to be transmitted to a higher-speed transmission. P. 343
Direct-sequence spread spectrum (DSSS)
__________ accomplishes communication
by breaking the data into subsignals and transmitting them simultaneously. P343
Orthogonal frequency division multiplexing (OFDM)
_________ accomplishes communication by hopping the transmission over a range of predefined frequencies. P. 343
Frequency-hopping spread spectrum (FHSS)
_______ is basically the network name. P.344
SSID
_____________ are the most widely used bit keys. P.345
64-bit and 128-bit
__________ uses a 128-bit dynamic per-packet key. P.345
Temporal Key Integrity Protocol (TKIP)
AES stands for what? P.345
Advanced Encryption Standard
SOHO stands for what? P.346
small office, home office
______ top out at speeds of 56Kbps P. 347
Dial-Up
What were some of the advantages of dial-up? P. 347
The only hardware it requires is a modem and a phone cord.
It’s relatively easy to set up and configure.
It’s the cheapest online solution (usually $10 to $20 per month).
You can use it wherever there is phone
service, which is just about everywhere.
DSL stands for? P. 348
Digital Subscriber Line
What are the different forms of DSL? P. 348
high bit-rate DSL (HDSL), symmetric DSL (SDSL), very high bit-rate DSL (VDSL), rate adaptive DSL (RADSL), and asymmetric DSL (ADSL)
Regular phone communications use frequencies from ________ to _________ P.349
0 to 4kHz
The first ADSL standard was approved in? P. 349
1998
some advantages to using DSL are? P.350
It’s much faster than dial-up
Your bandwidth is not shared with other users
It’s generally very reliable (depending on your ISP)
These provide high-speed Internet access through your cable service, much like DSL does over phone lines. P.351
What is a cable modem?
For business customers, cable download speeds can be? P. 351
400Mbps
