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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
Q

(ISP) stands for what? p 347

A

Internet service provider

26
Q

(DSL) stands for what? p 348

A

Digital Subscriber Line

27
Q

It utilizes existing phone lines and provides fairly reliable high-speed access. p 348

A

DSL

28
Q

There are actually several different forms of DSL. p 348

A 
(HDSL) high bit- rate DSL
(SDSL) symmetric DSL
(VDSL) very high bit- rate DSL
(RADSL) rate-adaptive DSL 
(ADSL) asymmetric DSL
29
Q

Uses frequencies in the 25.875kHz to 138kHz range for upstream traffic and in the 138kHz to 1104kHz range for downstream traffic. p 349

A

(ADSL) Asymmetric

30
Q

Most ADSL communication are what? p 349

A

Full-duplex

31
Q

Many phone providers will provide you DSL without a land line called what? p 351

A

Naked DSL

32
Q

(DOCSIS) stands for what? p 351

A

Data Over Cable Service Internet Specification

33
Q

(ISDN) stands for what? p353

A

Integrated Service Digital Network

34
Q

A digital point-to-point network capable of maximum transmission speeds of about 2Mbps although speeds of 128Kbps are more common. p 353

A

(ISDN) Integrated Service Digital Network

35
Q

An ISDN line has two types of channels. p 353

A

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
Q

Is also known as 2B+D because of the number and type of channels used. p 353

A

BRI ISDN

37
Q

Also known as 23B+D which means it has 23B channels and one D channel. p 353

A

(PRI) Primary rate interface

38
Q

Services which means that the cables are 100 present fiber from their data center to your home. p 354

A

(FTTH) Fiber-to-the-Home

39
Q

Satellite Internet is often referred to as ______ ? p 355

A

Line of Sight

40
Q

Another drawback to satellite technology is the delay also called what? p 355

A

Propagation delay

41
Q

Online gamers are especially sensitive to propagation delay. They often refer to it as what? p355

A

Ping Time

42
Q

One satellite can provide a signal to a number of receivers simultaneously. p 355

A

point-to- multipoint

43
Q

There are two major cell standards in the United States. p357

A

(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
Q

GSM splits up its channels by time division in a process called what? p 357

A

(TDMA) Time Division Multiple Access

45
Q

(GPRS) stands for what? p357

A

General Packet Radio Service

46
Q

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

A

CDMA

47
Q

CDMA have better transmission speeds than GSM it works in ranges up to what? p357

A

100 kilometers

48
Q

There are two major branches of 3G standards worldwide. p358

A

(UMTS) Universal Mobile Telecommunications System

CDMA 2000

49
Q

(WiMAX) stands for what? p359

A

World Wide Interoperability for Microwave Access.

50
Q

Intended to be an alternative to DSL or cable modems as an Internet access method whereas WiFi is clearly entrenched as a LAN standard.

A

WiMAX

51
Q

particular form of Electronic Surveillance that monitors telephonic and telegraphic communication. p 362

A

Wiretapping

52
Q

(EMI) stands for what? p 362

A

electromagnetic interference

53
Q

Two Bluetooth standards you might run across. p364

A

Version 1.2 supports data rates of up to 1Mbps

Version 2.1+EDR data rates of up to 3Mbps

54
Q

To aviod interference Bluetooth can ________ at different frequencies to avoid conflicts with devices using other technologies in the area. p364

A

signal hop

55
Q

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

A

Infrared Data Association (IrDA)

CompTIA A+ (20 decks)

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