press release from Ellacoya Networks to be interesting. HTTP is approximately 46% of all traffic on the network. P2P continues as a strong second place at 37% of total traffic. Newsgroups (9%), non-HTTP video streaming (3%), gaming (2%) and VoIP (1%) are the next widely used applications.
Breaking down application types within HTTP, the data reveals that traditional Web page downloads (i.e. text and images) represent 45% of all Web traffic. Streaming video represents 36% and streaming audio 5% of all HTTP traffic. YouTube alone comprises approximately 20% of all HTTP traffic, or nearly 10% of all traffic on the Internet.
There's some dispute regarding these numbers with respect to HTTP vs P2P, but overall I found these numbers surprising. I am surprised by the high newsgroups count -- is alt.whatever that significant?