List the three basic components of a communication system.
Transmitter
Communication Channel
Receiver
List three different types of media are used in communication systems
Electrical Conductors
Optical Media
Free Space
State the type of communication link.
Simplex Link
Explain the operation of this communication link
In ‘Duplex’ communications, information travel in two directions .
Explain the difference between a ‘Simplex’ and ‘Full-Duplex’ link.
‘Full-Duplex’ features simultaneous transmission but ‘Simplex’ does not .
Explain the difference between ‘Half-Duplex’ and ‘Full-Duplex’ communication links
In ‘Half-Duplex’ communications, information travels in two directions but not together at the same time but in ‘Full-Duplex’ communications, information travels in two directions simultaneously .
State 2 advantages of ‘Digital Transmission’.
Maintain Data Integrity
Transmit Longer Distance
State an advantage of ‘Serial’ digital transmission mode.
It is used for longer distance transmission as there are no ‘skew’ problems .
Describe ‘Asynchronous’ transmission in digital communications.
Each character is transmitted independently of all other characters .
State the various types of ‘Multiple Access’ scheme.
Frequency Division Multiple Access (FDMA)
Time Division Multiple Access (TDMA)
Code Division Multiple Access (CDMA)
Space Division Multiple Access (SDMA)
What does ‘CDMA’ stand for?
Code Division Multiple Access
State the name of the device that enables simultaneous transmission of several separate information channels over the same transmission medium without interference.