Telecommunications & Networks
- 1. Telecommunications & Networks By Emma MacMillan
- 2. What is Telecommunication? Telecommunication refers to sending and receiving of data via electricity through devices such as...
- 3. Functions - Transmits information between sender and receiver - Route messages on most efficient path to control information flow - Perform data editorial tasks & processing of information - Convert message speed or format Components - Computers - Terminals (input/output devices) to send and receive data - Communication processors - Communication software
- 4. Network Topologies Ring Network - All computers are linked with a closed loop Star Network - One computer acts as a central host to all computers and other devices Bus Network - Some computers linked by a single circuit
- 5. Communication Networks LAN Local Area Network: require own personal channel, access to a limited distance, requires cable connections - Commonly used in a home or office WLAN Wireless LAN: requires wifi and/or bluetooth, creates a small, personal network - Commonly used in a home or office WAN Wide Area Network: requires cable, satellite, and microwave technologies, covers large distances - Can be used to connect cities, states, countries, etc.
- 6. E-Commerce & E-Business Technologies E-mail, Groupware, Voicemail, and other electronic communications such as video conference have expanded the business sector to the virtual world. Such technologies allow us to buy and sell quite easily through the Internet.
- 7. Networking Enterprise: Smaller networks link to create a company wide network Internet: Links independent networks together Internet2: Supports higher bandwidth than Internet, works at higher speed
- 8. Interconnection Communication Telnet -Allows connectivity to multiple computers at a time Open System Interconnection -Determines layout to interconnect various devices or equipment TCP/IP Model -Based on OSI -Used for communication and transmission Internet Service Provider -Temporary connections for subscribers to communicate via Internet
- 9. WWW World Wide Web WWW, or the World Wide Web is more or less the biggest global information system. It is based on HTML and can combine sound, graphics, and hypermedia. Features Push Technology: Users are shown data based on their preferences or frequent searches, sites, etc. Firewall: Applies filter between internal and external networks. Extranets: Private intranets open to authorized external users.
- 10. Managing New Information Technologies Challenges - Losing control of management - Required organizational changes - Connectivity and application integration - Hidden costs - Reliability, scalability, security Content Managing System (CMS) - Allows many users to share data - Efficient communication for users - Reduces repetition - Manages servers, objects, and audits - Maintains reports and goals