1. Schutzvermerk nach DIN 34 beachten Ethernet IP

2. Schutzvermerk nach DIN 34 beachten TCP / IP and the OSI reference model Process / Application Host-to-Host Internet Network Access Physical TCP Coax, Twisted Pair, fibre optics,. App.AApp.BApp.CApp.D UDP Tokenr.PPPEthernet IP Application Presentation Session Transport Network Data Link Physical ISO / OSI

3. Schutzvermerk nach DIN 34 beachten IP or many roads lead to Rome...

4. Schutzvermerk nach DIN 34 beachten IP - The Internet Protocol or how modern Pathfinders work Net Subnet

5. Schutzvermerk nach DIN 34 beachten Net Subnet 0-127 The IP address according to IPv4 (4 Bytes) 128-191192-223 0 Class A 10 Class B 110 Class C 224-239240-255 1110 Class D 1111 Class E 126 networks with 16.777.216 devices each 16.384 networks with 65.536 devices each 2.097.152 networks with 254 devices each IP multicast addresses (e.g. all Hosts, all Gateways, etc.) Reserved for future applications The value 255 in each Byte is reserved as broadcast address IP - The Internet Protocol or how modern Pathfinders work

6. Schutzvermerk nach DIN 34 beachten The IP address (4 Bytes) 000001110100011111000111 10011100 Class A example class1.college.edu board.college.edu leader.activists.org pleas.home-office.gov harry.beefburgers.com monday.orders.flowers.au.... Name Server 78.7.71.199. IP - The Internet Protocol or how modern Pathfinders work

7. Schutzvermerk nach DIN 34 beachten Address 212.66.3.39 for 6 hours. Next ! Class C network with 254 addresses Address 212.66.3.52 for 4 hours. Next ! No address available. NO TCP/IP. Seeya. IP, DHCP, ARP, ICMP - is all that really necessary ? Part 1 : DHCP (Dynamic Host Configuration Protocol)

8. Schutzvermerk nach DIN 34 beachten Who is who in the IP or Im the MAC (ARP) TCP Coax, Twisted Pair, fibre optics. App.AApp.BApp.C UDP Tokenr.PPPEthernet IP IP address 124.20.0.14 124.20.0.26 124.20.0.31. Hardware- (MAC-) address 00-50-73-58-b3-40 00-50-73-52-a1-22 00-50-73-54-a3-00. 124.20.0.2600-50-73-52-a1-22122.10.0.12 ARP request to all nodesIP address 124.20.0.14 124.20.0.26 124.20.0.31. Hardware- (MAC-) address 00-50-73-58-b3-40 00-50-73-52-a1-22 00-50-73-54-a3-00. ARP response 20 min

9. Schutzvermerk nach DIN 34 beachten TCP and the OSI reference model: End-to-End Process / Application Host-to-Host Internet Network Access Physical TCP Coax, Twisted Pair, fibre optics. UDP Tokenr.PPPEthernet IP Application Presentation Session Transport Network Data Link Physical ISO / OSI TCP Coax, Twisted Pair, fibre optics. UDP Tokenr.PPPEthernet IP Connection orientated Connect, transmit, Terminate Data check Reception is acknowledged Multiplexing Different applications use TCP services App.AApp.BApp.CApp.AApp.BApp.C

10. Schutzvermerk nach DIN 34 beachten TCP and the OSI reference model: Sockets HTTP Appl. X TCP Coax, Twisted Pair, fibre optics UDP Tokenr.PPPEthernet IP TCP Coax, Twisted Pair, fibre optics UDP Tokenr.PPPEthernet IP TCP Coax, Twisted Pair, fibre optics UDP Tokenr.PPPEthernet IP IP 123.20.0.36 PC APC BPC C FTP-Control Socket HTTP IP 123.20.0.34IP 10.0.0.123 Socket Port 21,1 Well known Port Port 21,2 Well known Port Port 80 Well known Port Port 241 Local Port Port 1880 Local Port Port 361 Local Port Socket

11. Schutzvermerk nach DIN 34 beachten Windows the TCP fashion Station1 Station2 Station2: Establish HTTP connection ? OK ! My reception window has room for 8 packets.

12. Schutzvermerk nach DIN 34 beachten Station1 Station2 Windows the TCP fashion

13. Schutzvermerk nach DIN 34 beachten UDP and the OSI reference model: Hurry, hurry... Process / Application Host-to-Host Internet Network Access Physical TCP Coax, Twisted Pair, LWL,..... UDP Tokenr.PPPEthernet IP Application Presentation Session Transport Network Data Link Physical ISO / OSI TCP Coax, Twisted Pair, fibre optics UDP Tokenr.PPPEthernet IP Not connection orientated undirected data stream No supervision flow control is shifted to the higher layers Multiplexing Multiple applications use UDP services App.AApp.BApp.CApp.AApp.BApp.C