Interesting Facts and Figures

  • Domain Information: ( http://www.webcom.com/~walsh/)
    • December 31, 1994 - 29,000 domains registered
    • July 31,1995 - 76,000 domains registered
    • 8,200 domains registered in July, up from 7,600 in June
    • Last tally in August: 93,000 .COM / 8,000 .ORG / 5,000 .NET / 2,000 .EDU

  • SCS network information:
    • BACKBONE-3 handles average of 3000 packets/sec in, 5700 packets/sec out, bridge cache sees 1500-2000 ethernet addresses
    • GW.CS.CMU.EDU handles average of 300 packets/sec in, 300 packets/sec out on campus interface and internet interface, packet size averages around 400 bytes
    • Traffic to (campus+internet): 60% TCP (HTTP, NNTP, X, NETBIOS, FTP TELNET), 40% UDP (AFS, RPC, DNS),
    • Traffic to campus: 60% UDP (AFS, RPC, DNS), 40% TCP (BACKUP, X, NETBIOS, NNTP, RFS, TELNET)
    • Traffic to internet: 90% TCP (HTTP, NNTP, FTP), 10% UDP (AFS, DNS, NTP)
    • Traffic to SCS network from (campus+internet): 50% TCP (HTTP, NNTP, X, TELNET), 30% UDP (AFS, RPC, DNS, NTP), 15% MBONE
    • Traffic from campus: 43% UDP (AFS, RPC, DNS), 32% TCP (BACKUP, NNTP, X), 25% MBONE
    • Traffic from internet: 90% TCP (HTTP, NNTP, FTP, TELNET, MAIL), 10% UDP (DNS, NTP, AFS)

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