OSI Model
Ethernet
What is the protocol in data link layer?
UTP
Give example of twisted cable?
λf = c
relation between frequency and wavelength
Transmits raw bits over network
What does physical layer do?
this provides better shielding and better bandwidth than UTP
COaxial cable
10000Hz
Radio wave bandwidth
Deals with emails, web browsers
What does application layer do?
Glass a transmission medium
Fibre optic cable
10^10 Hz
Used for microwave communication
breaks input data into data frames
data link layer
Chromatic dispersion
Light pulses sent down a fiber spread out in length as they propagate.
a spectrum modulation technique primarily used to reduce overall signal interference
Direct sequence spread spectrum
handles congestion
What does network layer do?
LED and semiconductor laser
Types of fibre optic cables
FOr radio waves, the signal energy is spread more thinly over a larger surface
what is path loss?