* Modulation & Demodulation:-
This is often a preliminary step in signal transmission, either by antenna or to another device such as a television. demodulator is a circuit that is used in amplitude modulation and frequency modulation receivers in order to separate the information that was modulated onto the carrier from the carrier itsel
-Modem is used to connect internet converts analog signals to digital & digital to analog
*Types of Modem :-
1. DSL (digital subscriber line) :-
- It has same download & same uplode speed
2. ADSL ( asymmetric digital subscriber line):-
- Download & uplode speed will be different high speed for download &low speed for uplode
3. Data card :-
-Internet will be provided by simcard it may be GSM or CDMA
INTERNET CONNECTION SHARING (ICS)
These all settings are done in pc where internet is connected to share with its clint pc
click on - ( use the following IP address )
IP address = 50.0.0.1
subnetmask = 255.0.0.0
now move to the pc where you want to share the internet & make the settings
click on = (use the following IP address)
IP address = 50.0.0.2
subnet mask = 255.0.0.0
default gateway = 50.0.0.1 (main connected lan pc IP address)
preferred DNS server = 50.0.0.1 (main connected lan pc IP address)
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