CSC 412 - NetworkingScott Heggen

Agenda• Last discussion on OSI• Relate it to TCP/IP

OSI and TCP/IP

HTTP GET REQUEST

Web Server

index.html

Web Server

index.htmlHTTP

HTTP, Data

HTTP, Data

DataTCP, Source:80, Destination:1030

IP, Source:8.1.1.1, Destination:130.4.3.3 TCP, HTTP, Data

Ethernet, Source:0010.1111.1111, Destination:0030.3333.3333 IP, TCP, HTTP, Data FCS

Data

SW1

Data

SW1

DataEthernet, Source:0010.1111.1111, Destination:0030.3333.3333

MAC Address TablePort MAC 1 0010.1111.1111 9 0030.3333.3333

SW1

Data

Data

R1

Data DataEthernet, Source:0010.1111.1111, Destination:0030.3333.3333

R1

DataIP, Source:8.1.1.1, Destination:130.4.3.3

R1(config)# ip route 130.4.0.0 255.255.0.0 200.55.99.251

IP Routing TableDest. Next-Hop130.4.0.0 200.55.99.251

. .

. .

R1

DataEthernet, Source:0030.3333.3334 Destination:0040.4444.4444

R1

Data

Data

R2

DataDataEthernet, Source:0030.3333.3334

Destination:0040.4444.4444

R2

DataIP, Source:8.1.1.1, Destination:130.4.3.3

IP Routing TableDest. Next-Hop130.4.0.0 100.55.99.251

. .

. .

R2

DataEthernet, Source:0040.4444.4445 Destination:0050.5555.5555

R2

Data

Data

R3

DataDataEthernet, Source:0040.4444.4445

Destination:0050.5555.5555

R3

DataIP, Source:8.1.1.1, Destination:130.4.3.3

R3

DataEthernet, Source:0050.5555.5556 Destination:0020.2222.2222

R3

Data

Data

SW2

Data

SW2

DataEthernet, Source:0050.5555.5556, Destination:0020.2222.2222

MAC Address TablePort MAC 1 0050.5555.5556 9 0020.2222.2222

SW1

Data

Data

Data

Ethernet, Source:0050.5555.5556, Destination:0020.2222.2222 IP, TCP, HTTP, Data FCS

IP, Source:8.1.1.1, Destination:130.4.3.3 TCP, HTTP, Data

HTTP, DataTCP, Source:80, Destination:1030

HTTP, DataTCP, Source:80, Destination:1030

HTTP, Data

Email Application

Web Application

FTP Application

Web Browser

index.htmlHTTP

Web Browser