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CompTIA A+ > Chapter 8 > Flashcards

Chapter 8 Flashcards

1
Q

In order to connect to the wireless hub or router the client needs to know the _______ of the device. p 340

A

(SSID) Service-set identifier

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2
Q

(CSMA/CA) stands for what? p 340

A

Carrier Sense Multiple Access/Collision Avoidance

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3
Q

(CSMA/CD) stands for what? p 340

A

Carrier Sense Multiple Access/Collision Detection

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4
Q

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

A

Back-off time

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5
Q

The original 802.11 standard defines WLANs transmitting at what? p 340

A

1Mbps or 2Mbps bandwidths using the 2.4GHz frequency

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6
Q

Uses a more efficient encoding system orthogonal frequency division multiplexing OFDM rather than FHSS or DSSS. p 340

A

802.11a

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7
Q

Provides for bandwidths of up to 11Mbps (with fallback rates of 5.5, 2 and 1Mbps) in the 2.4GHz range. p 341

A

802.11b

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8
Q

The 802.11b and 802.11a standards are incompatible for two reason: p 341

A

Frequency and Modulation

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9
Q

Bandwidths of 54Mbps in the 2.4GHz frequency spectrum using OFDM or DSSS encoding. p 341

A

802.11g

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10
Q

To optimize performance you should upgrade to all 802.11g devices and set the access point to what? p 341

A

G-only

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11
Q

The three non-overlapping channels are? p 341

A

1,6 and 11

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12
Q

The standard claims to provide for bandwidth up to 600Mbps and works in both 2.4GHz and 5GHz range. p 342

A

802.11n

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13
Q

(MIMO) stands for what? p 342

A

Multiple-input Multiple-output

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14
Q

Means using multiple antennas rather than a single antennas to communicate information. p 342

A

MIMO

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15
Q

The three signal modulation techniques are? p 343

A

Frequency-hopping spread spectrum
Direct-sequence spread spectrum
Orthogonal frequency division multiplexing

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16
Q

As for connectivity devices the most common are wireless routers and a type of hub called what? p 343

A

(WAP) Wireless access point

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17
Q

Was one of the first security standards for wireless devices. p 345

A

(WEP) Wired Equivalency Protocol

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18
Q

It was intended to be a temporary solution to wireless security. p 345

A

(WPA) WiFi Protected Access

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19
Q

(TKIP) stands for what? p 345

A

Temporal Key Integrity Protocol

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20
Q

(WPA2) stands for what? p 345

A

WiFi Protected Access 2

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21
Q

It implements all of the required elements of the 802.11i security standards. p 345

A

WPA2

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22
Q

(AES) stands for what? p 345

A

Advanced Encryption Standards

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23
Q

Created to address the shortcomings of TKIP so consequently it’s much stronger than TKIP. p 345

A

(CCMP) Counter Mode CBC-MAC Protocol

24
Q

(SOHO) stands for what? p 346

A

Small office home office

25
(ISP) stands for what? p 347
Internet service provider
26
(DSL) stands for what? p 348
Digital Subscriber Line
27
It utilizes existing phone lines and provides fairly reliable high-speed access. p 348
DSL
28
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 ```
29
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
30
Most ADSL communication are what? p 349
Full-duplex
31
Many phone providers will provide you DSL without a land line called what? p 351
Naked DSL
32
(DOCSIS) stands for what? p 351
Data Over Cable Service Internet Specification
33
(ISDN) stands for what? p353
Integrated Service Digital Network
34
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
35
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
36
Is also known as 2B+D because of the number and type of channels used. p 353
BRI ISDN
37
Also known as 23B+D which means it has 23B channels and one D channel. p 353
(PRI) Primary rate interface
38
Services which means that the cables are 100 present fiber from their data center to your home. p 354
(FTTH) Fiber-to-the-Home
39
Satellite Internet is often referred to as ______ ? p 355
Line of Sight
40
Another drawback to satellite technology is the delay also called what? p 355
Propagation delay
41
Online gamers are especially sensitive to propagation delay. They often refer to it as what? p355
Ping Time
42
One satellite can provide a signal to a number of receivers simultaneously. p 355
point-to- multipoint
43
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.
44
GSM splits up its channels by time division in a process called what? p 357
(TDMA) Time Division Multiple Access
45
(GPRS) stands for what? p357
General Packet Radio Service
46
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
47
CDMA have better transmission speeds than GSM it works in ranges up to what? p357
100 kilometers
48
There are two major branches of 3G standards worldwide. p358
(UMTS) Universal Mobile Telecommunications System | CDMA 2000
49
(WiMAX) stands for what? p359
World Wide Interoperability for Microwave Access.
50
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
51
particular form of Electronic Surveillance that monitors telephonic and telegraphic communication. p 362
Wiretapping
52
(EMI) stands for what? p 362
electromagnetic interference
53
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
54
To aviod interference Bluetooth can ________ at different frequencies to avoid conflicts with devices using other technologies in the area. p364
signal hop
55
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)

CompTIA A+ (20 decks)

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