Provider 1

Zugang zum Internet

• Provider bieten Verbindung zum Internet
  Online-Dienste und Server-Betreiber

• Dial-in:
  Telefonanschluß, Modem,
  Terminalprogramm, Decoder

• Dial-up-IP: eigene IP-Adresse
  SLIP Serial Line IP,
  PPP Point to Point Protokoll
  Browser, FTP

• Standleitungen:
  LAN Local Area Network, "Intranet"
  WAN Wide Area Network

• Kostenteilungsprinzip:
  1. Zahlen des eigenen Netzes (LAN, Karten)

  2. Zahlen von Verbindungen zu einigen Nachbarn (WAN, Modem)

  3. Alle Welt darf meine Leitungen benutzen

  4. Ich habe das Recht in aller Welt Leitungen zu benutzen

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Kommunikation

• TCP/IP Protokoll

• "Netz von Netzen"

• IP-Adresse: 134.155.50.127

   % ping 134.155.50.127
   PING 134.155.50.127: 56 data bytes
   64 bytes from 134.155.50.127: icmp_seq=0. time=63. ms
   64 bytes from 134.155.50.127: icmp_seq=1. time=62. ms
   64 bytes from 134.155.50.127: icmp_seq=2. time=63. ms
   64 bytes from 134.155.50.127: icmp_seq=3. time=31. ms
   64 bytes from 134.155.50.127: icmp_seq=4. time=31. ms
  
   ----134.155.50.127 PING Statistics----
   5 packets transmitted, 5 packets received, 0% packet loss
   round-trip (ms)  min/avg/max = 31/50/63
  

• Domainnamen: rechner.subnetz.country.area

   % nslookup www.netscape.com
   Server:  rumms.uni-mannheim.de
   Address:  134.155.50.52
  
   Non-authoritative answer:
   Name:    www3.netscape.com
   Address:  205.218.156.44
   Aliases:  www.netscape.com
  

• Routing Januar 1997

    % traceroute www.netscape.com
  
    0  hicomgw1s.uni-mannheim.de (134.155.30.254)  125 ms  31 ms  63 ms
    1  hicomgw1s.uni-mannheim.de (134.155.30.254)  62 ms  31 ms  32 ms
    2  mannhattan.uni-mannheim.de (134.155.50.200)  62 ms  63 ms  31 ms
    3  Mannheim1.BelWue.DE (129.143.61.1)  94 ms  62 ms  94 ms
    4  Uni-Mannheim1.WiN-IP.DFN.DE (188.1.5.37)  31 ms  63 ms  31 ms
    5  ZR-Karlsruhe1.WiN-IP.DFN.DE (188.1.5.33)  62 ms  62 ms  31 ms
    6  ZR-Wiesbaden1.WiN-IP.DFN.DE (188.1.144.37)  63 ms  62 ms  32 ms
    7  ipgate1.WiN-IP.DFN.DE (188.1.144.70)  62 ms  63 ms  62 ms
    8  mix-serial3-6.Washington.mci.net (204.189.152.169)  219 ms  406 ms  250 ms
    9  core1-fddi-0.Washington.mci.net (204.70.2.1)  250 ms  219 ms *
   10  borderx1-hssi-3.SanFrancisco.mci.net (204.70.1.42)  375 ms  406 ms  281 ms
   11  borderx1-hssi-3.SanFrancisco.mci.net (204.70.1.42)  312 ms  281 ms  313 ms
   12  * netscape.SanFrancisco.mci.net (204.70.158.110)  281 ms  312 ms
   13  * 205.218.156.44 (205.218.156.44)  282 ms  312 ms
  

  September 1997

    % traceroute www.netscape.com
  
    0  hicomgw1s.uni-mannheim.de (134.155.30.254)  31 ms  63 ms  31 ms
    1  hicomgw1s.uni-mannheim.de (134.155.30.254)  31 ms  32 ms  62 ms
    2  mannhattan.uni-mannheim.de (134.155.50.200)  31 ms  62 ms  32 ms
    3  Mannheim1.BelWue.DE (129.143.61.1)  31 ms  31 ms  62 ms
    4  Uni-Mannheim1.WiN-IP.DFN.DE (188.1.5.37)  32 ms  63 ms  62 ms
    5  ZR-Karlsruhe1.WiN-IP.DFN.DE (188.1.5.33)  32 ms  62 ms  31 ms
    6  ZR-Frankfurt1.WiN-IP.DFN.DE (188.1.144.37)  63 ms  31 ms  63 ms
    7  IR-Perryman1.WiN-IP.DFN.DE (188.1.144.78)  156 ms  156 ms *
    8  166.48.39.253 (166.48.39.253)  156 ms  156 ms  125 ms
    9  core2.SanFrancisco.mci.net (204.70.4.201)  219 ms  219 ms  250 ms
   10  borderx2-fddi-1.SanFrancisco.mci.net (204.70.158.68)  219 ms  219 ms  219 ms
   11  netscape-ds3.SanFrancisco.mci.net (204.70.158.122)  218 ms  219 ms  218 ms
   12  h-207-200-71-20.netscape.com (207.200.71.20)  219 ms  219 ms  218 ms
   13  www24.netscape.com (207.200.73.73)  219 ms *  219 ms
  

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