Chapter 23 & 24 Test review Flashcards
Two wireless nodes that are communicating directly with each other, without any intermediary systems or hardware, are using what wireless mode?
Ad hoc
Which of these Wi-Fi security protocols is the least secure and is easily hacked?
WEP
What is a cheap and easy way to extend the range of a WAP?
Upgrade the antenna
What is the technical name of a wireless network?
SSID
What is the approximate range of a Bluetooth PAN?
~30 ft
Which of the following 802.11 standards can make use of both the 2.4- and 5-GHz bands?
802.11N
Which of the following devices is a major source of interference for Wi-Fi networks?
Microwaves
What device centrally connects wireless network nodes in the same way that a hub or switch connects wired Ethernet PCs?
WAP
What is the approximate range of an 802.11b/g network?
~300 ft
Which encryption method used on wireless networks is the most secure?
WPA2
What can limit wireless connectivity to a list of accepted users based on the hard-wired address of their wireless NIC?
MAC filtering
Which wireless standard combines the longest range with the most throughput?
802.11N
Personal area networks are created by what wireless technology?
Bluetooth
What is the best technology if you need Internet access from anywhere in the country?
Cellular wireless
What standard gained a speed boost in its second version with Enhanced Data Rate technology?
Bluetooth
Under ideal conditions, the 802.11g standard supports data throughout of up to ________ and has a range of up to ______.
54 Mbps
300 feet
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?
Interference with some metal object
Which encryption protocol offers the best security?
WPA2
Which device enables you to extend the capabilities of a wireless network?
WAP
In which mode do all the wireless devices connect directly to each other?
Ad hoc mode
What determines the name of a wireless network?
SSID
What technology enables 802.11n networks to make multiple simultaneous connections and thus improve speed over previous Wi-Fi standards?
MIMO
What’s the top speed for data transfers using IrDA technology?
4 Mbps
Bluetooth technology enables computer to link into what sort of network?
Personal area network (PAN)
What is the name for the common omni-directional antennas found on wireless access points?
Dipole antennas
Under outdoor conditions, the 802.11g standard supports data throughput of up to __________ and has a range of up to __________.
54 Mbps
140 meters
Which of the following wireless standards uses MIMO?
802.11n
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?
802.11a
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?
Reassess and add better security to his wireless network
Choose the two frequency bands used by 802.11 (SELECT TWO).
2.4 GHz
5 GHz
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?
MAC filtering
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?
Cellular card
Andrew wants to create a PAN using the wireless keyboard, mouse, and headset he just recently purchased. What wireless standard isBESTsuited for this?
Bluetooth
Which statements about integrated services digital network (ISDN) are true?(Select three)
- ) An ISDN connection uses either an internal or an external terminal adapter (TA).
- ) PRI has 23 B channels and 1 D channel for a total throughput of 1.544 Mbps.
- ) BRI has two B channels and one D channel for a throughput total of 128 Kbps.
What is the name for the extremely fast networking connections through which Internet transmissions take place?
Backbones
Which technology enables you to make voice calls over your computer network?
Voice over IP
A user on Windows 7 has asked you to teach her how to use a feature of Microsoft Word. What tool should you use?
Remote Assistance
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?
DNS failure
Where would you go first if you needed to configure a small Linksys router to use a static IP address?
The router’s configuration Web page.
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?
Satellite
What is the name for the router that your PC uses to connect to your Internet service provider?
Default gateway
A Virtual Private Network creates a(n) _______________ through the Internet?
Tunnel
Which of the following Internet connection methods limit the distance you can be from a central office?(Select two)
- ) DSL
2. ) ISDN
What port does POP3 use?
110
Liz can receive her e-mail, but she cannot send e-mail. Which of the following is most likely causing her problem?
SMTP
Which of the following programs enable you to access and work on a remote computer from you local computer? (Select two.)
- ) Remote Desktop
2. ) Telnet
What advantage does dial-up have over DSL?
You can be farther than 18,000 feet from a main phone service switching center.
Which protocols can you use to receive e-mail? (Select two.)
- ) IMAP4
2. ) POP3
What advantage does satellite have over cable for connecting to the Internet?
Cable is limited to areas with cable installed; satellite is not
A user who travels a lot wants 24/7 Internet access on her laptop. Which of the following would you recommend for her connection?
Cellular WAN
Which of the following URLs would indicate a secured HTTP server?
HTTPS://WWW.WHEEBO.COM
Which of the following Internet services would youLEASTlikely use with VoIP?
Satellite
Which would be a good replacement to using POTS?
VoIP
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?
Satellite
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?
The HOSTS file has an entry mapping the IP address for www.barney.com to the name www.google.com
After moving your PC to a different office, your internal modem can no longer detect a dial tone. What should you check?(Select two).
- ) Make sure the telephone cable is inserted all the way.
2. ) Make sure the telephone outlet is active
