Users view the Internet as a single network. What is the reality, and to what does a user’s computer attach?
What will be an ideal response?
Internet is a virtual network system because the communication system is an abstraction.
That is, although a combination of hardware and software provides the illusion of a uniform network
system, no such network exists. Internet protocol software hides the details of physical network
connections, physical addresses, and routing information. Neither users nor application programs are
aware of the underlying physical networks or the routers that connect them. Internet software
provides the appearance of a single, seamless communication system to which many user computers
attach. The system offers universal service: each computer is assigned an address, and any computer
can send a packet to any other computer.
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