Showing posts with label COMP20081. Show all posts
Showing posts with label COMP20081. Show all posts

Wednesday, 30 December 2009

Computer Networks - Applications

Network Applications


Computer networking? There's an app for that.

A network applications is a program that communicates over a network but runs on end systems, not core network devices. You can't install skype on a router!

There are 4 distinct architectures for network apps:

Tuesday, 27 October 2009

Computer Networks – Play-out Delay

Internet Phone: Fixed Play-out Delay

With this, the receiver attempts to play out each chunk of data at exactly qms after the chunk was generated.

  • This chunk has a time stamp, t: So the play-out chunk is at t+q
  • If the chunk arrives after t+q, then the data arrives too late for play-out – the data is LOST!

Thursday, 22 October 2009

Computer Networks - Multimedia

What is Multimedia?

So what exactly is multimedia? well the truth is – nobody knows!! This is because its nothing but binary data – except for audio and video which varies, and is commonly in analogue.