Client/server versus peer-to peer

Two services provided by the Internet’s transport layer:

Is HTTP Client/server or peer-to peer?

An application may choose UDP for a transport protocol for one or more of the following reasons:

Why, in the Internet, is the network layer said to provide unreliable data transfer?

What is flow control?

What is rwnd? (Receive Window)

Why does TCP use a "sliding window"?

When and how does the window size of TCP change?

How does TCP react to duplicate acknowledgements, and why?

Congestion control vs flow control

What is TCP congestion window?

Is slow start related to congestion control or flow control?

What does "slow start" entail in TCP?

How does slow start work?

How is reliability implemented in Ethernet?

Which protocol provides "best effort service"?

Explain CSMA/CD

what is an ARP table?

What are the mandatory fields of a forwarding table?