Introduction to Wireless Communications – Chapter 1

Posted on Aug 29, 2024 in Technology

Chapter 1 – Introduction to Wireless Communications

TRUE/FALSE

1. VoIP phones cannot carry analog data over the Internet. (False) [PTS: 1, REF: 3]

2. WirelessHD can transfer video and sound at 7 Gbps and higher. (True) [PTS: 1, REF: 6]

3. UWB WiGig has a range of up to 10 meters, not 100 meters. (False) [PTS: 1, REF: 6]

4. The ZigBee Alliance protocols do enable devices like light switches to communicate with one another. (True) [PTS: 1]

5. RFID technology is not implemented by roadside assistance services to link a vehicle and driver to a central service center. (False)

6. 4G technology uses 100% digital transmission for voice and data. (False) [PTS: 1, REF: 10]

7. An AP does connect wireless devices to the wired LAN. (True) [PTS: 1, REF: 11]

8. DSL is an Internet access technology that uses telephone lines, not cable TV lines, to make a network connection. (False) [PTS: 1, REF: 14]

9. The job market for wireless LAN professionals is not saturated and is likely to grow in coming years. (False) [PTS: 1, REF: 19]

10. One advantage of wireless technology is that it is susceptible to interference sources. (False) [PTS: 1, REF: 30]

MULTIPLE CHOICE

1. What type of device is built into a tablet computer and can send data over radio waves to another device such as a laser printer?

  1. VoIP phone
  2. Wireless NIC
  3. Access point
  4. Ethernet NIC

[ANS: B, PTS: 1, REF: 3]

2. How can VoIP over Wi-Fi help save money?

  1. By eliminating the need for a phone
  2. By saving on cellular phone bills
  3. By reducing the cost of a smartphone
  4. By not requiring an access point

[ANS: B, PTS: 1, REF: 4]

3. Where would you most likely find RFID tags around the house?

  1. On product packages
  2. In the walls and ceilings
  3. In the plumbing
  4. On the electrical lines

[ANS: A, PTS: 1, REF: 5]

4. What is the typical range for the use of Bluetooth?

  1. Meters to kilometers
  2. Yards to miles
  3. Inches to feet
  4. Millimeters to inches

[ANS: C, PTS: 1, REF: 5]

5. With what technology will you find radio modules and link managers?

  1. RFID
  2. GPS
  3. Wi-Fi
  4. Bluetooth

[ANS: D, PTS: 1, REF: 5]

6. Which technology has a maximum range of about 10 meters, can transmit up to 10 Gbps, and is used to transmit high quality audio and video wirelessly?

  1. Wi-Fi
  2. Bluetooth
  3. UWB
  4. RFID

[ANS: C, PTS: 1, REF: 6]

7. Automatic connections between what type of devices create a piconet?

  1. VoIP
  2. Infrared
  3. Bluetooth
  4. WirelessHD

[ANS: C, PTS: 1, REF: 7]

8. In what type of wireless communication device will you find a repeater?

  1. Satellite
  2. NFC
  3. Antenna
  4. WNIC

[ANS: A, PTS: 1, REF: 8]

9. What kind of network is built around the concept of low-power transmitters built on towers that can use the same radio frequency channel?

  1. Wi-Fi 802.11 networks
  2. Cellular telephone networks
  3. UWB A/V networks
  4. GPS tracking networks

[ANS: B, PTS: 1, REF: 9]

10. What type of cellular network uses 100 percent digital transmission for voice and data and can reach rates up to 150 Mbps?

  1. CDMA
  2. 4G
  3. 3G
  4. GSM

[ANS: B, PTS: 1, REF: 10]

11. What kind of device does a WLAN use to facilitate communication between wireless computers?

  1. Ethernet switch
  2. GPS hub
  3. Access point
  4. Cell station

[ANS: C, PTS: 1, REF: 11]

12. Which wireless standard provides for data transmission speeds up to 600 Mbps with a range up to 375 feet?

  1. 802.11g
  2. WiGig
  3. 802.16m
  4. 802.11n

[ANS: D, PTS: 1, REF: 12, 18]

13. Which technology uses regular phone lines and transmits at speeds up to 256 Kbps?

  1. POTS
  2. ISDN
  3. T1
  4. Cable modem

[ANS: B, PTS: 1, REF: 14]

14. Which communication technology should you use if you need to connect three offices which are all within 3 miles of each other at speeds up to 75 Mbps using antennas?

  1. T1
  2. DSL
  3. WiMax
  4. ISDN

[ANS: C, PTS: 1, REF: 14]

15. Where are you most likely to find the WAP2 protocol in use?

  1. Cellular phones
  2. Laptops
  3. Tablets
  4. Servers

[ANS: A, PTS: 1, REF: 16]

16. What term refers to the combining of voice, video and text-processing and access to multiple network platforms from a single device?

  1. Access aggregation
  2. Digital landscape
  3. Digital convergence
  4. Network transparency

[ANS: C, PTS: 1, REF: 20]

COMPLETION

1. Smartphones can use software that allows them to make VoIP (Voice over IP) phone calls over a wireless LAN instead of the cellular network. [PTS: 1, REF: 4]

2. Bluetooth communicates using small, low-power transceivers called radio modules. [PTS: 1, REF: 5]

3. In the future, most barcode functions are likely to be replaced by RFID tags, including for the purpose of inventory management. [PTS: 1, REF: 27]

4. To protect confidentiality, wireless data can be encrypted between the access point and wireless device, allowing only the recipient to decode the message. [PTS: 1, REF: 31]

5. The FCC, FDA, and EPA have established RF (Radio Frequency) exposure safety guidelines to limit the signal absorption rate of wireless device users. [PTS: 1, REF: 31]

MATCHING

Match the following terms to their definitions:

Terms:

  1. 3G
  2. Bluetooth
  3. DSL
  4. J2ME
  5. Link Manager
  6. Motes
  7. T1
  8. UWB
  9. WiGig
  10. WPAN

Definitions:

  1. A wireless standard that enables devices to transmit data at up to 721.2 Kbps over a typical maximum distance of 33 feet. (B – Bluetooth) [PTS: 1, REF: 32, 5]
  2. A variation of the Java programming language designed for use in portable devices such as cellular phones. (D – J2ME) [PTS: 1, REF: 33, 16]
  3. A very small network that typically extends to 10 meters or less. (J – WPAN) [PTS: 1, REF: 34, 7]
  4. A technology used to transmit data over special telephone lines at 1.544 Mbps. (G – T1) [PTS: 1, REF: 34, 14]
  5. An alliance of companies involved in developing a common wireless specification using the 60 GHz band. (I – WiGig) [PTS: 1, REF: 34, 6]
  6. A technology used to transmit data over a telephone line. (C – DSL) [PTS: 1, REF: 33, 14]
  7. Remote sensors used for collecting data from manufacturing equipment or for scientific research. (F – Motes) [PTS: 1, REF: 33, 28]
  8. Wireless communications technology that allows devices to transmit data at hundreds of megabits or even gigabits per second at short distances. (H – UWB) [PTS: 1, REF: 34, 6]
  9. A digital cellular technology that can send data at up to 21 Mbps over the cellular telephone network. (A – 3G) [PTS: 1, REF: 32, 10]
  10. Special software in Bluetooth devices that helps identify other Bluetooth devices. (E – Link Manager) [PTS: 1, REF: 33, 5]