Communication channels

Question 1

____________ are an essential element of every communication system. Channels actually carry data from one computer to another.

Answer 1

Communication channels

Question 2

Wireless connection involve six different connections:

Answer 2

1. Cellular
2. Bluetooth
3. Wi-Fi (wireless fidelity)
4. Microwave
5. WiMax (Worldwide Interoperability for Microwave Access)
6. Satellite

Question 3

___________ communication uses multiple antennae (____________) to send and receive data within relatively small geographic regions (________).

Answer 3

• Cellular
• cell towers
• cells

Question 4

__________ is a short-range radio communication standard that transmits data over short distances approx up to 33 feet.

Answer 4

Bluetooth

Question 5

______________ uses high-frequency radio signals to transmit data. Number of standards for Wi-Fi exist and each can send and receive data at a different speed.

Answer 5

Wi-Fi (wireless fidelity)

Question 6

____________ communication uses high-frequency radio waves. Sometimes referred to as line-of-sight communication.

Answer 6

Microwave

Question 7

___________________ is a wireless standard that extends the range of Wi-Fi networks using microwave connections. Commonly used by universities.

Answer 7

WiMax (Worldwide Interoperability for Microwave Access)

Question 8

___________ communication uses satellites orbiting about 22,000 miles above the earth as microwave relay stations.

Answer 8

Satellite

Question 9

___________ is a term relating to sending data to a satellite.

Answer 9

Uplink

Question 10

_________ refers to receiving data from a satellite.

Answer 10

Downlink

Question 11

________________ devices use that information to uniquely determine the geographic location of the device.

Answer 11

Global positioning system (GPS)

Question 12

Unlike radio waves, _________ uses infrared light waves to communicate over short distances.

Answer 12

infrared

Question 13

Physical connections include four connections:

Answer 13

1. Fiber-optic cable
2. Coaxial cable
3. Twisted-pair cable

Question 14

_____________ transmits data as pulses of light through tiny tubes of glass. Speeds of 1 petabit per second. Lighter, faster and more reliable at transmitting data.

Answer 14

Fiber-optic cable

Question 15

___________ a high-frequency transmission cable, replaces the multiple wires of telephone lines with a single solid-copper core. Has over 80 times the transmission capacity of twisted pair.

Answer 15

Coaxial cable

Question 16

_____________ consists of pairs of copper wire that are twisted together. Both landline _________ and _______ use twisted pair.

Answer 16

• Twisted-pair cable
• telephone lines
• ethernet cables