Chapter 1, Problem 21SG

Explanation of Solution

Internet:

• Internet is an interconnection of smaller networks around the world that establish a communication among computers that belong to the same protocols.
• It uses three ways to connect home computers to the network such as phone modem, a digital subscriber line, and cable modem...

Explanation of Solution

Reason of people using the Internet:

People use the Internet for the following uses are,

VoIP:

• Voice over Internet Protocol (VoIP) is a software and hardware that enables people to use the Internet.
  • Because, Internet is a transmission medium for telephone calls by sending voice data in packets.
  • It sends the packets using Internet Protocol (IP) rather than public switched telephone network (PSTN) traditional circuit.

E-mail:

• E-mail (Electronic mail) is the computerized messages that can be send from one user to more than one recipient through a network.
• Most e-mail users receive unwanted email advertising called spam. This e-mail spam is also called as Unsolicited Bulk Email (UBE) or Unsolicited Commercial Email (UCE) or junk mail...