An Overview of 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
•Networking protocol:
–Set of rules, algorithms, messages, and other mechanisms that enable software and hardware in networked devices to communicate effectively
•Synchronous communications:
–Receiver gets message instantaneously
•Asynchronous communications:
–Receiver gets message after some delay
•Guided transmission media types:
–Available in many types
•Twisted-pair wire:
–Classified by category: category 2, 3, 5, 5E, and 6
•Coaxial cable:
–Offers cleaner and crisper data transmission (less noise) than twisted-pair wire
•Fiber-optic cable:
–Transmits signals with light beams