IP
Address - Static vs. Dynamic, Public vs. Private, Shared vs. Dedicated
An
IP address is the location of a computer on the internet.
For
example:
123.45.67.89
Parts of an IP Address
An IP
address is composed of four parts:
- first
octet - the first number of the IP (123)
- second
octet - the second number of the IP (45)
- third
octet - the third number of the IP (67)
- fourth
octet - the fourth and last number of the IP (89)
IP Address Terminology
Static means the IP address never changes as
long as you stay with the same provider or same server.
Dynamic means the IP address can change from
time-to-time.
Public means the IP address can be visited
from any computer in the world.
Private means the IP address can only be used
by those on the same network.
Shared means other people use your IP address
for their connection or websites.
Dedicated means no one else uses your IP address
for their connection or websites.
Class identifies the range of your IP address
and the default subnet mask.
- A
class - 0 to 127 with default mask of 255.0.0.0
- B
class - 128 to 191 with default mask of 255.255.0.0
- C
class - 192 to 223 with default mask of 255.255.255.0
- D
class - 224 to 247 (not currently used)
- E
class - 248 to 255 (not currently used)
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