Telecommunication

•Telecommunications:
–Electronic transmission of signals for communications
•Telecommunications medium:
–Any material substance that carries an electronic signal to support communications between a sending and receiving device

Transmission Media Types

•3G wireless communications:
–Supports wireless voice and broadband speed data communications in a mobile environment
•4G wireless communications:
–4G will also provide increased data transmission rates in the 20–40 Mbps range
•Worldwide interoperability for microwave access (WiMAX)
–Operates like Wi-Fi, only over greater distances and at faster transmission speeds


•Smartphones:
–Combine the functionality of a mobile phone, camera, Web browser, e-mail tool, MP3 player, and other devices
–Have their own software operating systems
–Applications are developed by:
•The manufacturers of the handheld device
•The operators of the communications network on which they operate
•Third-party software developers


Systems Essentials, Sixth EditionNetwork Types
•Personal area networks:
–Support interconnection of information technology within a range of about 33 feet
•Local area networks:
–Connect computer systems and devices within a small area (e.g., office or home)
•Metropolitan area networks:
–Connect users and their devices in a geographical area that spans a campus or city
•Wide area networks:
–Connect large geographic regions

Top level domain affiliation