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Computer engineering 1 > Chapter 23 & 24 Test review > Flashcards

Chapter 23 & 24 Test review Flashcards

1
Q

Two wireless nodes that are communicating directly with each other, without any intermediary systems or hardware, are using what wireless mode?

A

Ad hoc

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2
Q

Which of these Wi-Fi security protocols is the least secure and is easily hacked?

A

WEP

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3
Q

What is a cheap and easy way to extend the range of a WAP?

A

Upgrade the antenna

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4
Q

What is the technical name of a wireless network?

A

SSID

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5
Q

What is the approximate range of a Bluetooth PAN?

A

~30 ft

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6
Q

Which of the following 802.11 standards can make use of both the 2.4- and 5-GHz bands?

A

802.11N

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7
Q

Which of the following devices is a major source of interference for Wi-Fi networks?

A

Microwaves

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8
Q

What device centrally connects wireless network nodes in the same way that a hub or switch connects wired Ethernet PCs?

A

WAP

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9
Q

What is the approximate range of an 802.11b/g network?

A

~300 ft

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10
Q

Which encryption method used on wireless networks is the most secure?

A

WPA2

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11
Q

What can limit wireless connectivity to a list of accepted users based on the hard-wired address of their wireless NIC?

A

MAC filtering

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12
Q

Which wireless standard combines the longest range with the most throughput?

A

802.11N

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13
Q

Personal area networks are created by what wireless technology?

A

Bluetooth

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14
Q

What is the best technology if you need Internet access from anywhere in the country?

A

Cellular wireless

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15
Q

What standard gained a speed boost in its second version with Enhanced Data Rate technology?

A

Bluetooth

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16
Q

Under ideal conditions, the 802.11g standard supports data throughout of up to ________ and has a range of up to ______.

A

54 Mbps

300 feet

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17
Q

Ralph has installed a wireless network in his house, placing the wireless access point in the kitchen, a centralized location. The Wi-Fi works fine in the living room and dining room but goes out almost completely in the bedroom. What’s most likely the problem?

A

Interference with some metal object

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18
Q

Which encryption protocol offers the best security?

A

WPA2

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19
Q

Which device enables you to extend the capabilities of a wireless network?

A

WAP

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20
Q

In which mode do all the wireless devices connect directly to each other?

A

Ad hoc mode

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21
Q

What determines the name of a wireless network?

A

SSID

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22
Q

What technology enables 802.11n networks to make multiple simultaneous connections and thus improve speed over previous Wi-Fi standards?

A

MIMO

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23
Q

What’s the top speed for data transfers using IrDA technology?

A

4 Mbps

24
Q

Bluetooth technology enables computer to link into what sort of network?

A

Personal area network (PAN)

25
Q

What is the name for the common omni-directional antennas found on wireless access points?

A

Dipole antennas

26
Q

Under outdoor conditions, the 802.11g standard supports data throughput of up to __________ and has a range of up to __________.

A

54 Mbps

140 meters

27
Q

Which of the following wireless standards uses MIMO?

A

802.11n

28
Q

Cain wants to install a wireless access point in his house, but he is unsure of the different wireless technologies in the market. Which wireless access point operates ONLY on the 5 GHz frequency?

A

802.11a

29
Q

Louis is using the Web interface to configure his SOHO home router/access point. At this exact moment, none of his own computers are on the wireless network. He goes into a screen called “active clients” only to see that a computer he doesn’t recognize is on his network. What should he do?

A

Reassess and add better security to his wireless network

30
Q

Choose the two frequency bands used by 802.11 (SELECT TWO).

A

2.4 GHz

5 GHz

31
Q

Kenneth has an 802.11n network. He only wants his three computers in the house to be able to access this network. Which of the following technologies would best enable him to do this?

A

MAC filtering

32
Q

Jim wants to be able to access his favorite website wirelessly with his new laptop, from anywhere. Which of the following would be theBESTchoice for him to install/configure?

A

Cellular card

33
Q

Andrew wants to create a PAN using the wireless keyboard, mouse, and headset he just recently purchased. What wireless standard isBESTsuited for this?

A

Bluetooth

34
Q

Which statements about integrated services digital network (ISDN) are true?(Select three)

A
  1. ) An ISDN connection uses either an internal or an external terminal adapter (TA).
  2. ) PRI has 23 B channels and 1 D channel for a total throughput of 1.544 Mbps.
  3. ) BRI has two B channels and one D channel for a throughput total of 128 Kbps.
35
Q

What is the name for the extremely fast networking connections through which Internet transmissions take place?

A

Backbones

36
Q

Which technology enables you to make voice calls over your computer network?

A

Voice over IP

37
Q

A user on Windows 7 has asked you to teach her how to use a feature of Microsoft Word. What tool should you use?

A

Remote Assistance

38
Q

John tried going towww.totalsem.comwith his Web browser, but the Web site wouldn’t load. He opened a command-line window and typedping www.totalsem.com. He received a message that the ping request couldn’t find www.totalsem.com. What is the most likely reason John received this message?

A

DNS failure

39
Q

Where would you go first if you needed to configure a small Linksys router to use a static IP address?

A

The router’s configuration Web page.

40
Q

A new client lives in a rural area, outside the connectivity radius of the local cable company and definitely more than 20,000 feet away from the nearest switching center for the phone company. Which Internet option offers the client the best performance?

A

Satellite

41
Q

What is the name for the router that your PC uses to connect to your Internet service provider?

A

Default gateway

42
Q

A Virtual Private Network creates a(n) _______________ through the Internet?

A

Tunnel

43
Q

Which of the following Internet connection methods limit the distance you can be from a central office?(Select two)

A
  1. ) DSL

2. ) ISDN

44
Q

What port does POP3 use?

A

110

45
Q

Liz can receive her e-mail, but she cannot send e-mail. Which of the following is most likely causing her problem?

A

SMTP

46
Q

Which of the following programs enable you to access and work on a remote computer from you local computer? (Select two.)

A
  1. ) Remote Desktop

2. ) Telnet

47
Q

What advantage does dial-up have over DSL?

A

You can be farther than 18,000 feet from a main phone service switching center.

48
Q

Which protocols can you use to receive e-mail? (Select two.)

A
  1. ) IMAP4

2. ) POP3

49
Q

What advantage does satellite have over cable for connecting to the Internet?

A

Cable is limited to areas with cable installed; satellite is not

50
Q

A user who travels a lot wants 24/7 Internet access on her laptop. Which of the following would you recommend for her connection?

A

Cellular WAN

51
Q

Which of the following URLs would indicate a secured HTTP server?

A

HTTPS://WWW.WHEEBO.COM

52
Q

Which of the following Internet services would youLEASTlikely use with VoIP?

A

Satellite

53
Q

Which would be a good replacement to using POTS?

A

VoIP

54
Q

Robert wants to have an Internet connection that will give him the lowest latency when viewing streaming videos. Which of these options should he chooseLAST?

A

Satellite

55
Q

Every time Tom tries to accesswww.google.com, he instead goes towww.barney.com. This only happens with this Web site. Of the following, what is the most likely problem?

A

The HOSTS file has an entry mapping the IP address for www.barney.com to the name www.google.com

56
Q

After moving your PC to a different office, your internal modem can no longer detect a dial tone. What should you check?(Select two).

A
  1. ) Make sure the telephone cable is inserted all the way.

2. ) Make sure the telephone outlet is active

Computer engineering 1 (10 decks)

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