List some advantages to the latest Internet technology devices on the market.

$2.$

How is packet switching different and better to circuit switching?

$3.$ What is the purpose of routers?

$4.$

What is the difference between a public network and a private network?

$5.$

Define the term encapsulation?

$6.$

What is a Web browser and what is it used for?

$7.$ List the disadvantages of using SGML$.$

$8.$ XML differs from HTML in two different ways. What are they?

$9.$ Web $2\mathrm{.}0$ is a new version of the WWW$.$ Give some examples of Web $2\mathrm{.}0.$