1. The Internet Protocol  Eliot Grove  Danny Friel  Stuart Anderson

2. OSI Model Application Presentation Session Transport Network Physical Data Link

3. The Network Layer  Navigating data  Source  Destination

4. Internet Protocol  Numbering scheme  Largest network of computers  American Registry of Internetwork Numbers (ARIN)

5. What is an IP address  A way to identify machines on a network  A unique identifier

6. IP usage  Used to connect to another computer  Allows transfers of files and e-mail

7. IP structure  IP addresses consist of four sections  Each section is 8 bits long  Each section can range from 0 to 255  Written, for example, 128.35.0.72

8. IP structure  These four sections represent the machine itself and the network it is on  The network portion is assigned.  The host section is determined by the network administrator

9. IP structure  5 Classes of IP address A B C D and E  Class A reserved for governments  Class B reserved for medium companies  Class C reserved for small companies

10. IP structure  Class D are reserved for multicasting  Class E are reserved for future use

11. IP structure  Class A begins 1 to 126  Class B begins 128 to 191  Class C begins 192 to 223

12. Reserved addresses  Addresses beginning 127 are reserved for loopback and internal testing  xxx.0.0.0 reserved for network address  xxx.255.255.255 reserved for broadcast

13. IP Addresses  IP addresses are:  Unique  Global and Standardised  Essential

14. Subnetting - Why?  Division of local networks  Greater number of networks  Simplifies addressing

15. Subnetting - How  Bits borrowed from host field Network Host Network SubnetHost Network SubnetSubnet/Host

16. Subnetting -Example  130.5.0.0 - Network address  130.5.2.144 - Host address  255.255.255.0 - Subnet Mask  130.5.2.0 - Subnet

17. Where do you want to go  Computer controlled dwellings  Road and rail systems  Criminal tagging Tomorrow?

18. The Internet Protocol  Running out!!  Upgraded to IPv6

19. Thank you!

20. And goodnight!