A service called Skype lets you make a phone call from a PC to a regular phone. This means that the voice call has to go through both the Internet and a telephone network to make it. Discuss which...

Extracted text: A service called Skype lets you make a phone call from a PC to a regular phone. This means that the voice call has to go through both the Internet and a telephone network to make it. Discuss which devices (such as routers, switches, and gateways) are involved.