Analog and Digital signals
Analog signals
Digital signals
Difference between Analog and Digital signals
Analog signals | Digital signals |
---|---|
An Analog signal is a continuous signal
which represents the physical measurement |
Digital signals are discrete-time signals
generated by digital modulation |
Analog signals are denoted by sine waves |
Digital signals are denoted by square wave |
Analog signal examples are a human voice in
the air, analog electronic devices |
Digital signal examples are computers, DVDs,
and other digital electronic devices |
Analog signals are affected by noise |
Digital signals are less affected by noise |
Analog hardware is not flexible |
Digital hardware is flexible |
Best suited for audio and video transmission |
Best suited for computing and digital
electronics |
Low cost and portable |
The cost is high and cannot be easily
portable |
Digital Network Essentials
- Internet Fundamentals
- Web Browsing
- Web Search Engines
- Need of Computer Network
- Data Communication Fundamentals-Analog and Digital Signal transmission
- Transmission Media-Guided Media: Twisted pairs, Coaxial Cable, Optical Fibers
- Transmission Media-Unguided Media: Radio-wave, Microwave, Satellite, Wi-Fi
- Network Classification-LAN, MAN, WAN, PAN
- Internet Security