Deck 1: Introduction to Wireless Communications

Question 1

Explain how a WLAN can be used in a classroom.
An instructor can create a classroom presentation on a notebook computer in his home or school office, then carry the computer right into the classroom. He does not have to plug and unplug cables to attach to the campus network. Instead, the notebook automatically connects to the classroom network as soon as the instructor walks into the room; it can even connect to multimedia display projectors without using wires.

Answer 1

An instructor can create a classroom presentation on a ebook computer in his home or school office, the n carry the computer right into the classroom He does have to plug and unplug ca bles to attach to the campus network Instead, the ebook automatically connects to the classroom network as soon as the instructor walks into the room; it can even conn ect to multimedia display projectors without using wires

Question 2

Explain how implementing a wireless network can be helpful in case of disaster recovery.
In the event of a disaster such as a flood or fire, managers can quickly relocate the office without needing to find a new facility with network wiring.

Answer 2

In the event of a disaster suc h as a flood or fire, managers can quickly relocate the office without needing to find a new facility with network wiring

Question 3

Describe how wireless networks can reduce installation time.
Wireless networks eliminate the need to install cables, which is a slow and expensive process.

Answer 3

Wireless networks eliminate the need to install cables, which is a slow and expensive process

Question 4

"WAP2" stands for ________________.

A) Wireless Access Protected version 2
B) Wi-Fi Access Protocol 2
C) Wireless Application Protocol version 2
D) Wireless Protected Access II

Question 5

The automatic connection between various Bluetooth devices creates a network called a(n) ___________.

A) micronet
B) small net
C) piconet
D) Intranet

Question 6

Explain how a WAP cellular phone sends and receives Internet data.
A WAP-enabled cellular phone sends and receives internet data in the form of a deck of cards. Data transmitted to this type of cellular phone must first be translated by a WAP server from a Web site. Data transmitted from a WAP-enabled cellular phone to the Internet is sent via the WAP server before it is forwarded to an Internet server.

Question 7

An earth station transmits to a satellite at one frequency, and the satellite regenerates and transmits the signal back to earth at another frequency.

Question 8

Each Bluetooth device uses a ____________, which is special software that helps identify other Bluetooth devices.

A) frame
B) link manager
C) repeater
D) bridge

Question 9

Ultra Wide Band technology is used primarily for _____________________.

A) displaying Web pages on a cellular phone
B) connecting devices inside the home at very high speeds
C) finding the location of a car within a city
D) transmitting data at distances of up to 35 miles

Question 10

IEEE 802.11n devices can be as far as 375 feet apart and can send and receive data at up to ________ million bits per second (Mbps).

A) 75
B) 600
C) 100
D) 54

Question 11

Most Bluetooth devices can transmit data at up to 1 Mbps over a distance of 33 feet (10 meters).

Question 12

__________ uses wireless transmissions for data communications as much as 35 miles apart.

A) Wi-Fi
B) WirelessHD
C) WiGig
D) WiMAX

Question 13

The new fourth generation (4G) cellular technology will allow data to be transmitted at a maximum speed of __________ Mbps.

A) 2 Mbps
B) 1 Gbps
C) 20 Mbps
D) 150 Mbps

Question 14

A wireless network interface card performs basically the same functions and looks similar to a traditional network interface (NIC) card.

Question 15

Explain the role of an access point (AP) in a WLAN.
An access point acts as a base station for all communications in a WLAN as well as an interface between the WLAN and the wired LAN.

Question 16

_________ provides a standard way to transmit, format, and display Internet data on cellular phones.

A) WLAN
B) WAP2
C) HTML
D) WML

Question 17

An 802.11 wireless NIC, when configured to communicate with a wired network, sends its signals through invisible radio waves to ____________.

A) another computer directly
B) an access point
C) a wireless server
D) the Internet

Question 18

Bluetooth devices communicate using small radio transceivers called ___________ that are built onto microprocessor chips.

A) receivers
B) transponders
C) radio modules
D) link managers

Question 19

Bluetooth can send data through physical barriers, like walls.

Question 20

Eliminating installation costs is a disadvantage of a WLAN.