Consider sending a series of packets from a sending host to a receiving host

Question

over a fixed route. List the delay components in the
end-to-end delay for a single packet. Which of these delays are constant and
which are variable?

Answer 1

http://www.google.com/search?q=packet+jitter&oq=packet+jitter&aqs=chrome..69i57j0l5.2987j0j7&sourceid=chrome&es_sm=119&ie=UTF-8

Read everything you can in these search results; you should find answers to your questions somewhere in here.

And here's another place for search for this very technical information:
http://www.webopedia.com/