1-1z The term switch used throughout this document refers to a switching device in a generic sense orthe switching engine of the WX3000 series.z The sample output information in this manual was created on the WX3024. The output informationon your device may vary.1 IP Addressing ConfigurationIP Addressing OverviewIP Address ClassesIP addressing uses a 32-bit address to identify each host on a network. An example is01010000100000001000000010000000 in binary. To make IP addresses in 32-bit form easier to read,they are written in dotted decimal notation, each being four octets in length, for example, 10.1.1.1 for theaddress just mentioned.Each IP address breaks down into two parts:z Net ID: The first several bits of the IP address defining a network, also known as class bits.z Host ID: Identifies a host on a network.For administration sake, IP addresses are divided into five classes, as shown in the following figure (inwhich the blue parts represent the address class).Figure 1-1 IP address classes0 Net-id Host-id1 Net-id Host-id01 Net-id Host-id011 Multicast address0111 Reserved111Class A0 7 15 23 31Class BClass CClass DClass ETable 1-1 describes the address ranges of these five classes. Currently, the first three classes of IPaddresses are used in quantity.
