For your first question, have a flick through the following website. There is also some other stuff on the same website marking the 15th anniversary of the internet.
References :
http://news.bbc.co.uk/1/hi/technology/5243862.stm

(c) Who maintains the connections which make up the Internet? What are the advantages and disadvantages of this arrangement? (5 percent)

(d) You are maintaining a small business website with the address ‘www.shoes4u.ie’. You are offered a cheaper hosting package with a company whose servers are based in Germany. Do you need to change your site name? If you don’t need to change explain how you can keep your name. If you do need to change explain how you will you redirect your current customers to your new site.(5 percent)

(e) I decide to name my brand new computer ‘project.ucc.ie’ and attach it to the internet.
(i) Why should I assign a name to a computer when it can be easily contacted by other computers using its IP number?
(ii) Who controls what names computers on the Internet can have?