Chapter 8 Flashcards
In order to connect to the wireless hub or router the client needs to know the _______ of the device. p 340
(SSID) Service-set identifier
(CSMA/CA) stands for what? p 340
Carrier Sense Multiple Access/Collision Avoidance
(CSMA/CD) stands for what? p 340
Carrier Sense Multiple Access/Collision Detection
Packet collision are generally avoided but when they do happen the sender will need to wait a random period of time called what? p 340
Back-off time
The original 802.11 standard defines WLANs transmitting at what? p 340
1Mbps or 2Mbps bandwidths using the 2.4GHz frequency
Uses a more efficient encoding system orthogonal frequency division multiplexing OFDM rather than FHSS or DSSS. p 340
802.11a
Provides for bandwidths of up to 11Mbps (with fallback rates of 5.5, 2 and 1Mbps) in the 2.4GHz range. p 341
802.11b
The 802.11b and 802.11a standards are incompatible for two reason: p 341
Frequency and Modulation
Bandwidths of 54Mbps in the 2.4GHz frequency spectrum using OFDM or DSSS encoding. p 341
802.11g
To optimize performance you should upgrade to all 802.11g devices and set the access point to what? p 341
G-only
The three non-overlapping channels are? p 341
1,6 and 11
The standard claims to provide for bandwidth up to 600Mbps and works in both 2.4GHz and 5GHz range. p 342
802.11n
(MIMO) stands for what? p 342
Multiple-input Multiple-output
Means using multiple antennas rather than a single antennas to communicate information. p 342
MIMO
The three signal modulation techniques are? p 343
Frequency-hopping spread spectrum
Direct-sequence spread spectrum
Orthogonal frequency division multiplexing
As for connectivity devices the most common are wireless routers and a type of hub called what? p 343
(WAP) Wireless access point
Was one of the first security standards for wireless devices. p 345
(WEP) Wired Equivalency Protocol
It was intended to be a temporary solution to wireless security. p 345
(WPA) WiFi Protected Access
(TKIP) stands for what? p 345
Temporal Key Integrity Protocol
(WPA2) stands for what? p 345
WiFi Protected Access 2
It implements all of the required elements of the 802.11i security standards. p 345
WPA2
(AES) stands for what? p 345
Advanced Encryption Standards
Created to address the shortcomings of TKIP so consequently it’s much stronger than TKIP. p 345
(CCMP) Counter Mode CBC-MAC Protocol
(SOHO) stands for what? p 346
Small office home office
(ISP) stands for what? p 347
Internet service provider
(DSL) stands for what? p 348
Digital Subscriber Line
It utilizes existing phone lines and provides fairly reliable high-speed access. p 348
DSL
There are actually several different forms of DSL. p 348
(HDSL) high bit- rate DSL (SDSL) symmetric DSL (VDSL) very high bit- rate DSL (RADSL) rate-adaptive DSL (ADSL) asymmetric DSL
Uses frequencies in the 25.875kHz to 138kHz range for upstream traffic and in the 138kHz to 1104kHz range for downstream traffic. p 349
(ADSL) Asymmetric
Most ADSL communication are what? p 349
Full-duplex
Many phone providers will provide you DSL without a land line called what? p 351
Naked DSL
(DOCSIS) stands for what? p 351
Data Over Cable Service Internet Specification
(ISDN) stands for what? p353
Integrated Service Digital Network
A digital point-to-point network capable of maximum transmission speeds of about 2Mbps although speeds of 128Kbps are more common. p 353
(ISDN) Integrated Service Digital Network
An ISDN line has two types of channels. p 353
The data is carried on a channel called a Bearer channel or B channel which can carry 64Kbps of data.
The second type of channel is used for call setup and link management and is known as the signal channel or D channel
Is also known as 2B+D because of the number and type of channels used. p 353
BRI ISDN
Also known as 23B+D which means it has 23B channels and one D channel. p 353
(PRI) Primary rate interface
Services which means that the cables are 100 present fiber from their data center to your home. p 354
(FTTH) Fiber-to-the-Home
Satellite Internet is often referred to as ______ ? p 355
Line of Sight
Another drawback to satellite technology is the delay also called what? p 355
Propagation delay
Online gamers are especially sensitive to propagation delay. They often refer to it as what? p355
Ping Time
One satellite can provide a signal to a number of receivers simultaneously. p 355
point-to- multipoint
There are two major cell standards in the United States. p357
(GSM) Global System for Mobile Communication is the most popular, boasting over 1.5 billion users in 210 countries.
(CDMA) Code Division Multiple Access which was developed by Qualcomm and is available only in the United States.
GSM splits up its channels by time division in a process called what? p 357
(TDMA) Time Division Multiple Access
(GPRS) stands for what? p357
General Packet Radio Service
Considered superior to GSM because it doesn’t break up its channels by time but rather by a code inserted into the communicated message. p357
CDMA
CDMA have better transmission speeds than GSM it works in ranges up to what? p357
100 kilometers
There are two major branches of 3G standards worldwide. p358
(UMTS) Universal Mobile Telecommunications System
CDMA 2000
(WiMAX) stands for what? p359
World Wide Interoperability for Microwave Access.
Intended to be an alternative to DSL or cable modems as an Internet access method whereas WiFi is clearly entrenched as a LAN standard.
WiMAX
particular form of Electronic Surveillance that monitors telephonic and telegraphic communication. p 362
Wiretapping
(EMI) stands for what? p 362
electromagnetic interference
Two Bluetooth standards you might run across. p364
Version 1.2 supports data rates of up to 1Mbps
Version 2.1+EDR data rates of up to 3Mbps
To aviod interference Bluetooth can ________ at different frequencies to avoid conflicts with devices using other technologies in the area. p364
signal hop
Formed as a technical consortium to support “interoperable, low-cost infrared data interconnection standards that supports a walk-up point-to-point user model. p 365
Infrared Data Association (IrDA)
