Transcript What is an IP address

The Internet Protocol
 Eliot
Grove
 Danny
Friel
 Stuart Anderson
OSI Model
Application
Presentation
Session
Transport
Network
Data Link
Physical
The Network Layer

Navigating data

Source

Destination
Internet Protocol
 Numbering scheme
 Largest
network of computers
 American
Registry of Internetwork
Numbers (ARIN)
What is an IP address

A way to identify machines on a network

A unique identifier
IP usage

Used to connect to another computer

Allows transfers of files and e-mail
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
IP structure
 These
four sections represent the machine
itself and the network it is on
 The
 The
network portion is assigned.
host section is determined by the
network administrator
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
IP structure
 Class
D are reserved for multicasting
 Class
E are reserved for future use
IP structure

Class A begins 1 to 126

Class B begins 128 to 191

Class C begins 192 to 223
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
IP Addresses
 IP addresses are:
 Unique
 Global and Standardised
 Essential
Subnetting - Why?
 Division of local networks
 Greater number of networks
 Simplifies addressing
Subnetting - How
 Bits borrowed from host field
Network
Network
Host
Host
Network
Network
Subnet
Host
Network
Network
Subnet
Subnet/Host
Subnetting -Example
 130.5.0.0
 130.5.2.144
 255.255.255.0
 130.5.2.0
- Network address
- Host address
- Subnet Mask
- Subnet
Where do you want to go
Tomorrow?
Computer controlled dwellings
Road and rail systems
Criminal tagging
The Internet Protocol
 Running
out!!
 Upgraded to
IPv6
Thank you!
And goodnight!