1. Intro to Computer Networking
Intro to digital technology
August 23, 2018

2. What is a network?
Two or more computer systems connected together to share and exchange data
Networks make better use of limited resources

3. Why do we network? Sharing information Sharing resources
File sharing – data between computers
Sharing resources
Centralizing administration and support
Better communication
Synchronous-question/answer at the same time
Asynchronous-questions have to wait on answer

4. Traits of a good network
Reliable - dependable
Scalable – hardware and software can grow up or down as organization needs change
Redundant – anticipates disaster – duplicate data and resource to minimize downtime and data loss
Secure
Speed – critical

5. Parts of a Network Clients
Computers that request or order information from a server
Usually desktop computers with their own local storage and processing power
Thin client – network computer with no local storage

6. Servers
Computers that work behind the scenes to provide (serve) the resources requested by the clients
Two types
Non-dedicated – provides many different services to its client computers such as file retrieval, printing, and ing
Dedicated – provides only one type of resource to its clients, such as printing

7. Computer Networking
Internet
Network - A network is a group of computers connected together in a way that allows information to be exchanged between the computers.

8. Where are computer networks used?
Home
All Offices
Schools
The demand for computer and technology employees equates to about 350,000 unfilled jobs per year.

9. Computer Networking
Node - A node is anything that is connected to the network. While a node is typically a computer, it can also be something like a printer or CD-ROM tower.
Internet

10. Computer Networking
Segment - A segment is any portion of a network that is separated, by a switch, bridge or router, from other parts of the network.
Internet

11. Computer Networking
Internet
Backbone - The backbone is the main cabling of a network that all of the segments connect to. Carries 10x the megabits a segment can.

12. Router - A router connects at least two networks, commonly two LANs or WANs or a LAN and its ISP's network.
Routers are located at gateways, the places where two or more networks connect, and are the critical device that keeps data flowing between networks and keeps the networks connected to the Internet.

13. Computer Networking Topology
Topology - Topology is the way that each node is physically connected to the network

14. Common Networking Topologies
Fully Connected
Bus
Star
Ring
Tree
Mesh
Hybrid
Dual Ring
Linear

15. Other network components
Shared peripherals – a device that is connected to a computer and controlled by its microprocessor
Media – physical pieces used to transport data from one computer to another computer or peripheral on the network
Data - packets

16. Specialized Servers File Servers Print Servers Application Servers
Mail Servers
Communication Servers
Directory Services Servers
Backup Servers