Key Concepts - Week Seven

Question 1

Packet Switching:

Answer 1

Method of slicing digital messages into parcels (packets), & then reassembling packets at destination

Question 2

TCP/IP & connectivity:

Answer 2

Common worldwide standard that is the basis for the internet

Protocols: rules that govern transmission of information between two points

Question 3

Department of Defense reference model for TCP/IP:

Answer 3

– Application layer
– Transport layer
– Internet layer
– Network interface layer

Question 4

IP Address:

Answer 4

A unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network

Question 5

Wi-Fi:

Answer 5

Set of standards: 802.11

Area: 30 to 50 m

Used for wireless LAN and wireless Internet access

Use access points: device with radio
receiver/transmitter for connecting wireless devices to a wired LAN

Hotspots: one or more access points in public place to
provide maximum wireless coverage for a specific area

Weak security features

Question 6

Radio-Frequency Identification:

Answer 6

A technology that uses electromagnetic fields to automatically identify and track tags attached to objects

Use tiny tags with microchips containing data about an item & location

Area: 3 to 300 ft