~~~~~~ 3rd Lecture - Networking IP Subnetting ~~~~~~~~

[k2s]

Ok Guys.... I am starting....... with a questions What is an IP Address?

[k2s]

[quote author=k2s link=topic=234570.msg2922889#msg2922889 date=1315508260]
Ok Guys.... I am starting....... with a questions What is an IP Address?
[/quote]"IP" stands for Internet Protocol
An Internet Protocol is a set of rules that govern Internet activity and facilitate completion of a variety of actions on the World Wide Web. An IP address consists of four numbers, each of which contains one to three digits, with a single dot (.) separating each number or set of digits. Each of the four numbers can range from 0 to 255. Here's an example of what an IP address might look like: 78.125.0.209. P addresses can be either static or dynamic. Static IP addresses never change.

Dynamic IP addresses are temporary and are assigned each time a computer accesses the Internet. They are, in effect, borrowed from a pool of IP addresses that are shared among various computers.

Static IP addresses are generally preferable for such uses as VOIP (Voice over Internet Protocol), online gaming, or any other purpose where users need to make it easy for other computers to locate and connect to them.

[k2s]

Every device connected to the public Internet is assigned a unique number known as an Internet Protocol (IP) address. IP addresses consist of four numbers separated by periods (also called a 'dotted-quad') and look something like 127.0.0.1.

Since these numbers are usually assigned to internet service providers within region-based blocks, an IP address can often be used to identify the region or country from which a computer is connecting to the Internet. An IP address can sometimes be used to show the user's general location.


Because there is a limited number of IP addresses and with increased usage of the internet ISPs now issue IP addresses in a dynamic fashion out of a pool of IP addresses (Using DHCP). These are referred to as dynamic IP addresses.

[k2s]

How to find IP address of a host ur using.... ???
there are many ways - CLI command promt, Network connections, any online web "whatismyip" etc......

How do I change my IP address?


Windows

- Computer connected directly to the modem
Get to a command prompt. (START, run, cmd).

Type "ipconfig /release" (without the quotes, on the command line by itself).
Type "ipconfig /renew" (without the quotes, on the command line by itself).
Windows (second option)

- Computer connected directly to the modem
Get to a command prompt. (START, run, cmd).
Type "ipconfig /release" (without the quotes).
Shut down computer.
Turn off computer.
Turn off all ethernet hubs/switches.
Turn off cable/DSL modem.
Leave off overnight.
Turn everything back on.
Network with Router

Log into the router's admin console. (Often [url=http://192.168.1.1/]http://192.168.1.1/[/url])
Release the IP address. (Method varies by router manufacturer)
Turn off router, ethernet hubs/switches, and the cable/DSL modem.
Leave off overnight.
Turn everything back on.

[k2s]

What are Public & Private addresses ??

Public Addresses : The ICANN (formerly IANA) and its member organizations manage the process of
assigning IP network numbers, or even smaller ranges of IP addresses, to companies that
want to connect to the Internet. After a company is assigned a range of IP addresses, only
that company can use that range. Additionally, the routers in the Internet can then learn
routes to reach these networks, so that everyone in the entire Internet can forward packets
to that IP network. Because these IP addresses can be reached by packets in the public
Internet, these networks are often called public networks, and the addresses in these
networks are called public addresses.

[k2s]

Some computers will never be connected to the Internet. So, engineers building a network
consisting of only such computers could use IP addresses that are duplicates of registered
public IP addresses in the Internet. So, when designing the IP addressing convention for
such a network, an organization could pick and use any network number(s) that it wanted,
and all would be well. For instance, you can buy a few routers, connect them together in
your office, and configure IP addresses in network 1.0.0.0 and make it work, even though
some company also uses Class A network 1 as its registered public IP network. The IP
addresses that you use might be duplicates of real IP addresses in the Internet, but if all you
want to do is learn on the lab in your office, all is well.

[k2s]

Private IP Networks                        Class of Networks                                  Number of Networks
10.0.0.0 through 10.0.0.0                              A                                                            1
172.16.0.0 through 172.31.0.0                      B                                                          16
192.168.0.0 through 192.168.255.0              C                                                        256



CP/IP RFC 1918 defines a set of private networks that can be used for
internetworks that do not connect to the Internet. More importantly, this set of private
networks will never be assigned by ICANN to any organization for use as registered public
network numbers



In other words, any organization can use these network numbers. However, no organization
is allowed to advertise these networks using a routing protocol on the Internet.

[k2s]

Good One more NO  sHa_clap4 sHa_clap4 sHa_clap4

[k2s]

aNY DOUBTS

[krldr871]

*=: *=: *=:  idi basic ee..ivi vachu..ip subnetting annav  &D_@@ &D_@@ &D_@@  adi koosintha start cheyyi baaa  CITI_$D# CITI_$D# CITI_$D#

[k2s]

[quote author=John Galt link=topic=234570.msg2923276#msg2923276 date=1315511636]
*=: *=: *=:  idi basic ee..ivi vachu..ip subnetting annav  &D_@@ &D_@@ &D_@@  adi koosintha start cheyyi baaa  CITI_$D# CITI_$D# CITI_$D#
[/quote]idi just IP addressing review.......
based on public demand will continue...... evvaru chudatam ledu ani apesa

[Antaraatma]

sHa_clap4 sHa_clap4 sHa_clap4 sHa_clap4 sHa_clap4 sHa_clap4 sHa_clap4 koncham artham aindi..

first 2 classes aithe bebe ne..  sSa_j@il sSa_j@il

[maya]

nice thread nice thread bookmark chesukunta ifudu sadive time ledu...dbts gtalk lo adugutha *u( *u(

[Picha lite]

[quote author=k2s link=topic=234570.msg2923284#msg2923284 date=1315511728]
idi just IP addressin g review... ....
based on public demand will continue. ..... evvaru chudatam ledu ani apesa
[/quote]seppu baa[img]http://www.gifsoup.com/view3/1771383/enjoy-o.gif[/img]

[ToughGuy]

S%Hi S%Hi S%Hi S%Hi S%Hi  sHa_clap4 sHa_clap4 sHa_clap4