Ans. VoIP can be typically used in the following ways.
Computer to Computer: This is the basic form of VoIP. Users can simply talk to each other through a piece of software installed on their computers using a headset.
Phone to Computer: Users can use a VoIP program installed on their computer to call phones. They can call any number worldwide; landline or mobile phone.
VoIP Phones: VoIP phones apparently look like telephones. Users speak and hear through them just like a phone connected to the internet, hence the name is VoIP system. Dialling the number is same as that of normal phone.
VoIP Adapters: VoIP adapters can connect existing telephone to VoIP system. This means users can use their current phone to use VoIP.