Exam 3 ISMN

Question 1

Wireless

Answer 1

Telecommunications in electromagnetic waves carry the signal and transmit data (microwave, satellite, radio, etc)
Binary Communication (0’s and 1’s)

Question 2

Microwave Adv/Disadv

Answer 2

Adv: High Bandwidth, relatively inexpensive
Disadvantages: Needs unobstructed line of sight

Question 3

Satellite Adv/Disadv

Answer 3

Adv: High Bandwidth, high coverage
Disadv: Needs unobstructed line of sight, expensive, must use encryption, signals experience propogation delay

Question 4

Radio Adv/Disadv

Answer 4

Adv: High Bandwidth, signals pass through walls. inexpensive, easy to install
Disadv: Creates electrical interference, susceptible to snooping unless encrypted

Question 5

3 basic types of Tellecommunications Satellites

Answer 5

GEO, MEO, LEO

Question 6

How many satellites orbiting Earth? How many inactive?

Answer 6

> 7900, >3170

Question 7

Wavelength

Answer 7

Trough to Trough

Question 8

Wave Frequency

Answer 8

Waves produced from the source per second

Question 9

Bluetooth

Answer 9

uses low-power; peer-to-peer; can transmit up to 50 Mbps up to 1,300 ft

Question 10

Ultra-Wideband:

Answer 10

Ultra-Wideband: popular application are Real-Time Location Systems (people trackers via badges) ; transmission speeds over 100 Mbps up to 650 ft

Question 11

Near Field Communication (NFC):

Answer 11

Embedded in mobile devices; smallest range; used for mobile wallets / proximity purchases

Question 12

Wi-Fi (Wireless Fidelity)

Answer 12

300 ft access area (multiple access points/extenders expand
coverage)

Question 13

Cellular Radio

Answer 13

Cell phone networks. Cell phones communicate with radio antennas
(towers) placed within geographic areas called cells. Information is transmitted to the local cell tower & passed from cell tower to cell tower until it reaches its destination.

1st Generation (1G) thru 5th Generation (5G)
Long Range

Question 14

Security Concerns

Answer 14

transmissions can be intercepted by anyone who is close enough and has access to the appropriate
equipment

Question 15

To protect wireless networks,

Answer 15

encryption is used
WPA2 – popular wi-fi encryption for wireless networks

Question 16

Rogue Access Points

Answer 16

(unauthorized access point into a
wireless network/employee brings a wireless device):
i.e. Evil twin attack using a Hotspotter – device that detects wireless networks & provides info on them –
to spoof a legitimate network

Question 17

War Driving

Question 18

Eavesdropping

Answer 18

(accessing data on wireless networks by unauthorized users)

Question 19

Radio Frequency Jamming

Answer 19

Intentional and Unintentional Interference

Question 20

Mobile Computing

Answer 20

refers to a real-time, wireless connection between a mobile device and other computer environments

Question 21

Mobility in mobile computing

Answer 21

users carry a device with them and can initiate a real-time contact with other systems from wherever they happen to be

Question 22

Broad reach in mobile computing

Answer 22

refers to the fact that when users carry an open mobile device, they can be reached instantly, even across great distances

Question 23

Mobile Commerce (m-commerce)

Answer 23

refers to e-commerce
transactions conducted with a mobile device

Question 24

Telemetry

Answer 24

Wireless transmission and receipt of data gathered from remote sensors

Question 25

Internet of Things (IoT)

Answer 25

a system in which any object, natural or
manmade, has a unique identity (IP Address) and is able to
send and receive information over a network without human
interaction

Question 26

Managing Data

Answer 26

Means aquiring,