ZyXEL P-2602HW-63 User Guide - Page 353
IP Addresses and Subnetting
View all ZyXEL P-2602HW-63 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 353 highlights
P-2602H(W)(L)-DxA Series User's Guide APPENDIX D IP Addresses and Subnetting This appendix introduces IP addresses, IP address classes and subnet masks. You use subnet masks to subdivide a network into smaller logical networks. Introduction to IP Addresses An IP address has two parts: the network number and the host ID. Routers use the network number to send packets to the correct network, while the host ID identifies a single device on the network. An IP address is made up of four octets, written in dotted decimal notation, for example, 192.168.1.1. (An octet is an 8-digit binary number. Therefore, each octet has a possible range of 00000000 to 11111111 in binary, or 0 to 255 in decimal.) There are several classes of IP addresses. The first network number (192 in the above example) defines the class of IP address. These are defined as follows: • Class A: 0 to 127 • Class B: 128 to 191 • Class C: 192 to 223 • Class D: 224 to 239 • Class E: 240 to 255 IP Address Classes and Hosts The class of an IP address determines the number of hosts you can have on your network. • In a class A address the first octet is the network number, and the remaining three octets are the host ID. • In a class B address the first two octets make up the network number, and the two remaining octets make up the host ID. • In a class C address the first three octets make up the network number, and the last octet is the host ID. Appendix D IP Addresses and Subnetting 353