what is a computer network
interconnected computing devices that exchange data and share resources with each other
Types of Bandwith,broadband,file server, routers
-local area Networks (LAN)
- Wide Area Networks (WAN)
- enterprise Networks(corporate backbone networks)
Network Topology Types
- point to point
- bus
- ring
- star
- tree
- mesh
-hybrid
Network Fundamentals
- Basic concepts
- Communications Media and Channels
- Network protocols
- types of network processing
Basic Concepts
- Digital signals, analog signals
- modem or modulators
Communications Media and Channels
- Twisted-pair wire
- coaxial cable
- fiber optic cable
Network Protocols
- Ethernet(family of wired computer networking technologies)
- Transmission Control
packet switching, four layers)
application layer, transport layer, internet layer, network interface layer
Types of Network Processing
- client/server computing
-peer to peer processing
Accessing the internet
Connecting through:
- online service
-satellite
- internet kiosks
-wifi
-cable modem
Three factors causing internet speed reduction:
- increase number of people working online
- increase viewing of full motion videos requiring large amounts of band width
- increased demand of health care technology uses
What is the word wide web
a system of universally accepted standards for storing, retrieving, formatting, and displaying information
Network Applications: Discovery
- search engines and meta search engines
- portals
Affinity Portal
a customer portal theme that provides a modern more intuitive, and clean user interface allowing users to manage their subscriptions seamlessly
Network Applications: Communication
- email
-web based call centers - electronic chat room
-telecommuting
Network Applications: Collaboration
-Crowdsourcing
- Teleconferencing and video conferencing
Network Applications: Education
-e-learning
- Distance learning
- virtual universities
