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March 11, 2007

Private and Public IP Addresses Explained

by @ 9:13 am. Filed under Network

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Public IP Addresses

What is Public IP address

Public IP Addresses (also known as Static IP Addresses) are IP addresses that are visible to the public.Because these ip addresses are public, they allow other people to know about and access your computer, like a Web server.In some cases, you do not want people to access your computer or you want to restrict certain individuals from accessing your computer or server.

Private IP Addresses

What is Private IP address

These addresses can be used on a private network, but they’re not routable through the public Internet. This not only creates a measure of much-needed security, but it also conveniently saves valuable IP address space.

Current Private IP addresses as follows

Class A

10.0.0.0 through 10.255.255.255

Class B

172.16.0.0 through 172.31.255.255

Class C

192.168.0.0 through 192.168.255.255

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6 Responses to “Private and Public IP Addresses Explained”

  1. Chris Says:

    This is perhaps not a really vital distinction but a Public IP Address is NOT automatically a Static IP Address.

    On my home DSL connection, for example, I have a Dynamic IP Address - it is assigned by my ISP and will sometimes change (hence Dynamic) but it is the IP address visible to the world (Public) for all computers on my network.

    Within my network, of course, Class C addresses are used and information is routed to the appropriate machine using those addresses by my router.

    I would say that the Public IP Address is the one broadcast or transmitted with request packets so that information may be routed accurately to your access point, router, or stand-alone computer/workstation; or broadcast so that your access point, router, or stand-alone computer/workstation may be located by other machines/services on the public network or internet.

  2. Allen Says:

    Public IP address can be static or dynamic, depending on what you have applied with your ISP.

    Most of the case a static public IP is used if the purpose is to have a fixed IP address (Web Server, FTP Server and etc.).

    The private IP address above is true and for standard use your private network must follow these IP addressing.

    **************************************
    Class A
    10.0.0.0 through 10.255.255.255

    Class B
    172.16.0.0 through 172.31.255.255

    Class C
    192.168.0.0 through 192.168.255.255
    ***************************************

    All IP address except the above mentioned is for public use (From Class A to Class E).

  3. ganesh Says:

    Public ip address are unique n used by web servers like yahoo.com , google.com
    they r paid ip address
    Private ip address r unique within a LAN
    they r used for general purpose n are free

    The valid private ip address are
    Class A 10.0.0.1 to 10.255.255.254

    Class B 172.16.0.1 to 172.31.255.254

    Class C 192.168.0.1 to 192.168.255.254

    Rest are public

  4. munir Says:

    i have public ip for third party.how can i log on in that pc? pls explain me.

    Best regards
    Munir

  5. munir Says:

    Actually my question is. i wanna logon to other computer remotely i have all that computer details
    for example= lan ip and public ip. pls write me in details

    best regards

    Munir

  6. vikas Says:

    i want to know about the procedure of connectivity by static ip

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