|
Home > Archive > General Discussion > March 2002 > Understanding IP Addressing
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Understanding IP Addressing
|
|
| cross36 2002-03-28, 10:13 am |
| Here's a good read for people trying to understand IP addressing in general;
Every computer that communicates over the Internet is assigned an IP address that uniquely identifies the device and distinguishes it from other computers on the Internet. An IP address consists of 32 bits, often shown as 4 octets of numbers from 0-255 represented in decimal form instead of binary form. For example, the IP address
168.212.226.204
in binary form is
10101000.11010100.11100010.11001100.
But it is easier for us to remember decimals than it is to remember binary numbers, so we use decimals to represent the IP addresses when describing them. However, the binary number is important because that will determine which class of network the IP address belongs to. An IP address consists of two parts, one identifying the network and one identifying the node, or host. The Class of the address determines which part belongs to the network address and which part belongs to the node address. All nodes on a given network share the same network prefix but must have a unique host number.
Class A Network -- binary address start with 0, therefore the decimal number can be anywhere from 1 to 126. The first 8 bits (the first octet) identify the network and the remaining 24 bits indicate the host within the network. An example of a Class A IP address is 102.168.212.226, where "102" identifies the network and "168.212.226" identifies the host on that network.
Class B Network -- binary addresses start with 10, therefore the decimal number can be anywhere from 128 to 191. (The number 127 is reserved for loopback and is used for internal testing on the local machine.) The first 16 bits (the first two octets) identify the network and the remaining 16 bits indicate the host within the network. An example of a Class B IP address is 168.212.226.204 where "168.212" identifies the network and "226.204" identifies the host on that network.
Class C Network -- binary addresses start with 110, therefore the decimal number can be anywhere from 192 to 223. The first 24 bits (the first three octets) identify the network and the remaining 8 bits indicate the host within the network. An example of a Class C IP address is 200.168.212.226 where "200.168.212" identifies the network and "226" identifies the host on that network.
Class D Network -- binary addresses start with 1110, therefore the decimal number can be anywhere from 224 to 239. Class D networks are used to support multicasting.
Class E Network -- binary addresses start with 1111, therefore the decimal number can be anywhere from 240 to 255. Class E networks are used for experimentation. They have never been documented or utilized in a standard way. | |
| Slinky 2002-03-28, 1:19 pm |
| Lots of good information. If I didn't already understand IP addressing, that would definately help out alot. | |
| rockman20 2002-03-28, 1:28 pm |
| IP addressing I have a basic understanding on. Now, get into subnetting. How does that relate to IP? | |
|
| lots of ppl just didn't spend enuff time on binary. If they have it pat down, then later variation like route summarization/supernetting, VLSM etc are so easy and apparent. | |
|
|
|
| too many error and not proof reading it suck!!!! refer to other sources to learn  | |
|
| duh, i forgot, instead of writing all taht, should've just point it to freak's guide or other sources. | |
| cross36 2002-03-28, 1:53 pm |
| There you go, also good resources supplied by the Freak.. | |
|
|
| rockman20 2002-03-28, 2:08 pm |
| 1) Who is in charge of the IP distribution?
2) When you get your IP distribution, do they give you your subnet as well?
3) Is it possible to have the same IP address, but different subnets?
4) Do these rules need to apply for private IP addressing?
5) You only need a public IP for the internet correct? (EX. 100 workstations connect to one server for internet access. The server needs a public IP and the workstations can be private correct?)
Thanks freak for posting that site. It will come in handy! Thanks to everyone else on this board that is willing to share their knowledge to others like me. | |
|
| 1. IANA
2. they assing ip by class network, a b c, i believe only c are available, a b are all taken (therefore, only 255.0.0.0 255.255.0.0 255.255.255.0 is valid. this is a given based on the class are requested/assigned. )
3. no, unless its a private ip, which is a whole different story
4. yes, except the duplicate part.
5. yes. | |
|
| you're welcome. Let us know if we can help further |
|
|
|
|
