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The current version of IP is IPv4. A new version, called IPv6 or IPng, is under development.
IPv6 is an attempt to solve the shortage of IP addresses.
IP Address
Systems are defined by their IP address, a four-byte (octet) number uniquely defining each
host on the Internet. It is usually shown in form
notation.
An IP address is partitioned into two portions: the network prefix and a host number on that
network. A
Subnet Mask
•
The
Network Address
).
192.168.2.0
•
The
Broadcast Address
).
192.168.2.255
There are a finite number of IP addresses that can exist. Therefore, a local area network
typically uses one of the
address ranges are:
to
10.0.0.0
10.255.255.255
to
172.16.0.0
172.31.255.255
to
192.168.0.0
192.168.255.255
A
Dynamic IP Address
server or similar mechanism. It is called dynamic because you may be assigned a different
IP address each time you establish a connection.
A
Static IP Address
usually required for any host that is running a server, for example, a Web server.
IPSec
IP Security (IPSec) is a set of protocols to support the secure exchange of packets at the
layer. It uses shared public keys. There are two encryption modes: Transport and Tunnel.
•
Transport mode encrypts only the data portion (payload) of each packet, but leaves the
headers untouched.
•
The more secure Tunnel mode encrypts both the header and the payload.
is used to define the portions. There are two special host numbers:
consists of a host number that is all zeroes (for example,
consists of a host number that is all ones (for example,
-designated address ranges for use in private networks. These
IANA
is an IP address that is automatically assigned to a host by a
is an IP address that is hard-wired for a specific host. A static address is
Psion Teklogix 9160 G2 Wireless Gateway User Manual
. This is called dotted-decimal
192.168.2.254
Appendix D: Glossary
IP Address
DHCP
IP
D-59
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