Unit 5A: Communications & Networks

Question 1

Digital

Answer 1

0s and 1s

Question 2

Analog

Answer 2

signals used in traditional TV and radio

Question 3

Modem

Answer 3

converts analog to digital, connects home to internet service provider.

Question 4

HAN, LAN, WAN and MAN

Answer 4

Home Area Network
Local Area Network
Wide Area Network
Metropolitan Area Network

Question 5

2 Network Structures

Answer 5

1) Client/server
2) Peer-to-peer

Question 6

Intranet

Answer 6

uses internet for company’s internal use

Question 7

Extranet

Answer 7

similar to intranet + allows use from select outside entities

Question 8

VPN

Answer 8

virtual private network, establishes secure and private connection with public network.

Question 9

Network Topology

Answer 9

Ring, Star, Bus, Mesh, Tree

Question 10

Network Linking Devices

Answer 10

Switch, Bridge, Gateway, Router, Backbone, NIC and NOS

Question 11

Ethernet

Answer 11

LAN tech that links all devices in local area network

Question 12

Home Connections Media

Answer 12

Ethernet, HomePNA, HomePlug

Question 13

5 Types of Wireless Communications Media

Answer 13

Infrared
Microwave
Broadcast
Comms Satellites
Cellular

Question 14

Different Heights of Communications Satellites

Answer 14

LEO
MEO
Geo
(low-medium-geostationary)

Question 15

1G

Answer 15

Analog cellphones

Question 16

2G

Answer 16

uses digital signals

Question 17

3G

Answer 17

broadband tech, first few smart phones

Question 18

4G

Answer 18

LTE, faster internet

Question 19

Personal Area Wireless

Answer 19

Bluetooth
Ultra Wideband (low power source to send millions of bursts of radio waves)
Wireless USB (game controllers, printers, flash drives, etc)

Question 20

Short Range Wireless for Home

Answer 20

Insteon - combination of power line and wireless tech
ZigBee - fully wireless
Z-Wave - fully wireless, power efficient tech

Question 21

Twisted-Pair Wire

Answer 21

2 strands of insulated copper wire twisted around each other

Question 22

Coaxial Cable

Answer 22

Insulated copper wire wrapped in a metal shield & then in external plastic cover
for cable TV and internet

Question 23

Fiber-Optic Cable

Answer 23

hundreds of thin strands of glass or plastic that transmit pulses of light

Question 24

What is the action of connecting to someone’s network without their consent?

Answer 24

Piggybacking

Question 25

HomePNA

Answer 25

uses existing phone wiring and jacks (speed of 320 MGs)

Question 26

HomePlug

Answer 26

uses existing home electrical lines (speeds of 200 MGs)

Question 27

WiMax

Answer 27

similar to WiFi but with greater range (10-30 miles)