Re: Re: IP addresses? There is.... IP Addresses are made up of four binary octets, although we see them in dotted decimal format. The real format is xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx (1s or 0s) There are 5 classes of IP address, ranging from A to E. Whatever the class of the address, it is split into two (not necessarily equal) parts. One part, the first part, is the Network address, and the second part is the Host address. The example you gave of 80.34.99.56 is a class A address (the first octet is between 1-127). In a class A address, the first octet is the Network portion, the remaining three are the Host portions, in the form of NNNNNNNN.HHHHHHHH.HHHHHHHH.HHHHHHHH. Of course, this can be subnetted, which can alter where the network portion starts, to give more networks but fewer hosts....but thats more complicated than you asked. A class A network is cabable of having the most hosts (2 to the power of 24 - thats 16777216 hosts, although the actual usuable hosts is less) But now i'm getting too complicated
Just to extend that..... The only adresses we will see are A, B, and C classes, as D and E (unicast and multicast) are typically used for testing purposes. As said, class A is 1-127 (although the range 10.x.x.x and 127.x.x.x are not used on the internet), and is in the form of, first part network portion, remaining three parts host portion. Class B ranges from 128-191, in the form of NNNNNNNN.NNNNNNNN.HHHHHHHH.HHHHHHHH (Half and half, network portion & Host portion) Class C is from 192-223 and is in the form of NNNNNNNN.NNNNNNNN.NNNNNNNN.HHHHHHHH. Class A has the fewest networks but most hosts, class C has the most networks but fewer hosts. (And obviously Class B is inbetween) These addresses are assigned based on the needed number of networks/hosts. The Promise website for example, is on the server of 195.10.229.53 - Thats a class C address.
I was taking the piss like - kinda tongue in cheek cos who am i to call any1 a geek :laugh: Every1 is a geek at heart
lol @ this thread.. If anyone else reads this they will be like - :wtf: I remember my first experience of IP addressin.. dear god it confused me.. Once you get into the conversion of the address into binary and sorting classes etc it truely began to hurt my brain..
I was just reading an article that happened to mention IPv6....it can have up to 128 bit address space That is a rediculous amount of addresses....so much so that every hardware device in the world could have an IP address, even your kitchen hardware like fridges and microwaves Cool
supernetting does my head in. classes are ok but converting to binary, shifting the class re-converting back to decimal just goes off the scale.... lucky the technology can do it with little interferance. it's taking over the world. computers controlling computers... we're no longer needed. except as batteries.
This is true!! I have not done supernetting yet....I'm not sure if I do. I get confused, as a supernetted address with mask looks the same as a subnetted address.....it's called CIDR yeh?Classless Inter-Domain Routing? Wonderful :spangled:
