HP 2605dn HP Color LaserJet 2605/2605dn/2605dtn - User Guide - Page 99
IP address: network portion, IP address structure and class, Default, address, configuration, AutoIP
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IP address: network portion Network addresses are managed by an organization in Norfolk, Virginia, recognized as InterNIC. InterNIC has been contracted by the National Science Foundation to manage the Internet addresses and domains. Network addresses are distributed to organizations that are in turn responsible for making sure all attached devices or hosts on the network are properly numbered. For more information on the network portion of an IP address, see Default IP address configuration (AutoIP) and Subnets in this section. IP address: host portion Host addresses numerically identify specific network interfaces on an IP network. Usually a host has only one network interface; thus, only one IP address. Because no two devices can share the same number at the same time, administrators typically maintain address tables to assure correct assignment of addresses in the host network. IP address structure and class An IP address is comprised of 32 bits of information and divided into 4 sections containing 1 byte each section or 4 bytes total: xxx.xxx.xxx.xxx For efficiency in routing, networks were broken down into three classes, so routing can begin simply by identifying the leading byte of information in the IP address. The three IP addresses that InterNIC assigns are class A, B, and C. The network class determines what each of the four IP address sections identify as shown below: Table 8-5 IP address class format Class A B C First Address Byte xxx. Network. Network. Network. Second Address Byte xxx. Host. Network. Network. Third Address Byte xxx. Host. Host. Network. Fourth Address Byte xxx Host. Host. Host. As illustrated in Table 8-6 Network class characteristics, each network class differs by the leading bit identifier, the address range, the number of each type available, and the maximum number of hosts each class allows. Table 8-6 Network class characteristics Class A B C Network Class Characteristics 0 10. 110. Address Range 0.0.0.0 to 127.255.255.255. 128.0.0.0 to 191.255.255.255. 192.0.0.0 to 223.255.255.255. Maximum Number of Maximum Hosts in Networks in the Class the Network 126. Over 16 Million. 16,382. 65,534. Over 2 Million. 254. ENWW TCP/IP 87