1.5

Question 1

What is the internet protocol stack

Answer 1

Application: supporting network applications
(FTP, SMTP, HTTP), user to user messages

transport: process to process data transfer (end to end communication, Muring and Demuxing)
uses UDP and TCP protocols
end to end segment

network: routing of datagrams from source to destination
host to host datagrams
IP is biggest protocol

link: data transfer between neighbouring network elements
hop by hop frames
Ethernet/Wifi is large known protocol

physical: bits on the wire
mediums are optical fibre and coaxial cable

Question 2

What is missing from the internet stack?

Answer 2

presentation: allowing application to interpret meaning of data
session: synchronization, checkpointing and recovery of data exchange