Question:

(a) Outline the main interactions that take place when a user requests a valid web resource in the Address Bar of a modern web client till the resource is eventually displayed on-screen.

Your answer should include a most complete explanation of internetworking terms and concepts.

(b) In terms on network security, distinguish between the following:

i. Confidentiality and Authentication
ii. Integrity and Authorization
iii. Private and Public Key cryptography

(c) Describe, in reasonable detail, the process by which an electronic mail can be constructed and sent to another uniquely identifiable email recipient in another part of the world.

You should concentrate in particular on the underlying network requirements and the different protocols involved.