• A communication network is a collection of
network elements integrated and managed to support the transfer of
information.
Data Transmission:
links and switches.
• Optical fiber
•
Copper coaxial cable
•
Unshielded twisted wire pair
•
Microwave or radio “wireless” links.
Optical fiber and copper links are usually point-to-point links, whereas radio links are usually broadcast
links.
Guided media:
twisted pair (unshielded and
shielded)
coaxial cable
optical fiber
Unguided media:
radio waves
microwaves (high frequency
radio waves)