1. Unit 5 Terminology Study Assignment Review Computer Technology
Networks
Unit 5 Terminology Study
Assignment Review
Computer Technology

2. Network
A computer network, or simply a network, is a collection of computers and other hardware components interconnected by communication channels that allow sharing of resources and information.

3. Network Beginnings
The Defense Advanced Research Projects Agency (DARPA) funded the design of the Advanced Research Projects Agency Network (ARPANET) for the United States Department of Defense. The First operational computer network in the world began in the late 1960’s.

4. Interested in more info on ARPANET? Click below to watch the video

5. Properties of a Network
Facilitates communications
Permits sharing of files, data, and other types of information
Share network and computing resources (i.e. network printer)
May be insecure
May interfere with other technologies
May be difficult to set up

6. Types of Network Wiring
Twisted pair
telecommunication
Coaxial cable
Television, office buildings and LANs
ITU-T b.hn
Uses home wiring (Coaxial able, phone lines, etc.)
Optical Fiber Cable
Glass fiber

7. Wireless Networks Terrestrial microwave Communications satellites
Cellular and PCs Systems
Radio and spread spectrum technologies (Blue Tooth)
Infrared Communication
Global Area network (GAN)

8. Network Classifications
Personal Area Network (PAN)
Local Area Network (LAN)
Home Area Network (HAN)
Campus Area Network (CAN)
Metropolitan Area Network (MAN)
Wide Area Network (WAN)
Enterprise Private Network

9. Local Area Network (LAN)
Computer network that is located within a limited geographical area, such as a school or small business
Example
The FFJHS Network

10. Wide Area Network (WAN)
Interconnected group of computers and peripherals that cover a large geographical area, such as multiple buildings
Examples
The Davis School District Network
The Internet

11. Network Terms File Server Host Computer
A computer connected to a network that distributes resources to other users
Contains the software to manage and process files for other network users
Host Computer
Refers to any computer that provides services to network users
Used more commonly with the Internet

12. Network Terms (continued)
Workstation
Refers to a personal computer connected to a network
Example
Each computer in the classroom
Client
Refers to the software on a computer that allows the user to access the server
Novell Netware

13. Network Interface Card (NIC)
Small circuit board that coverts the digital signals from a computer into signals that can travel over a network
Desktop Computers have the NIC inside the case with a jack on the outside for the network cable
Example
Our classroom computers
Notebook or Laptop Computers have a special card that fits into a slot or opening in the case.

14. IP Addresses
A unique identifying number assigned to each computer connected to the internet
Example –
Each computer on a network should have its own separate IP Address or conflicts will occur when there are duplicate addresses
IPv6 is the successor to the Internet's first addressing infrastructure

15. WiFi
A mechanism for wirelessly connecting electronic devices. A device enabled with Wi-Fi, such as a personal computer, video game console, smartphone, or digital audio player, can connect to the Internet via a wireless network access point.

16. Network Connections Devices
Modem
A device that sends and receives data to and from computers over telephone lines.
Hubs
A device that connects several components of a network
Routers
A device that connects at least two networks
Gateway
A device that serves as an entrance to another network
Switch
A network switch or switching hub is a computer networking device that connects network segments or network devices
All of these can be used alone or in a combination

17. Other Network Services
PSNs:
Short for packet-switched data network, a data communications network that is based on the principles of packet switching, as opposed to circuit switching that is used in public telephone networks
DNSs:
Short for Domain Name System (or Service or Server), an Internet service that translates domain names into IP addresses
VPNs:
Virtual Private Network. A Virtual Private Network is a network that is configured for private use inside of a public network.

18. The End!
Use these notes to complete the Review activity and study for the test!

19. Resources
Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology - Thompson Learning, 2002.