Lantronix XPress-DR-IAP XPress-DR / XPress-DR-IAP - User Guide - Page 110
IP Addresses, 4.1 Network Portion, 4.2 Subnet Portion
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UDP 8.4 IP Addresses Each TCP/IP node on a network host has a unique IP address. This address provides the information needed to forward packets on the local network and across multiple networks if necessary. IP addresses are specified as x.x.x.x, where each x is a number from 1 to 254; for example, 192.0.1.99. The Device Server must be assigned a unique IP address to use TCP/IP network functionality. IP addresses contain three pieces of information: the network, the subnet, and the host. 8.4.1 Network Portion The network portion of the IP address is determined by the network type: Class A, B, or C. Table 35 - Network Portion of IP Address Network Class Class A Class B Class C Network Portion of Address First byte (2nd, 3rd, and 4th bytes are the host) First 2 bytes (3rd and 4th bytes are the host) First 3 bytes (4th byte is the host) In most network examples, the host portion of the address is set to zero. Table 36 - Available IP Addresses Clas s A B C D, E Reserved Available 0.0.0.0 127.0.0.0 128.0.0.0 191.255.0.0 192.0.0.0 223.255.255.0 224.0.0.0 to 255.255.255.254 255.255.255.255 1.0.0.0 to 126.0.0.0 128.1.0.0 to 191.254.0.0 192.0.1.0 to 223.255.254.0 None Consider the IP address 36.1.3.4. This address is a Class A address; therefore, the network portion of the address is 36.0.0.0 and the host portion is 1.3.4. 8.4.2 Subnet Portion The subnet portion of the IP address represents which sub-network the address is from. Subnetworks are formed when an IP network is broken down into smaller networks using a subnet mask. 8-14 DSTni-XPress DR User Guide