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- IPv4_subnetting_reference abstract "In the IPv4 address space certain address blocks are specially allocated or reserved for special uses such as loopback interfaces, private networks (RFC 1918), and state-less autoconfiguration (Zeroconf, RFC 3927) of interfaces. Such addresses may be used without registration or allocation from Regional Internet Registries (RIRs). However, these address ranges must not be routed into the public Internet infrastructure.The netmask is a bitmask that can be used to separate the bits of the network identifier from the bits of the host identifier. It is often written in the same notation used to denote IP addresses.Not all sizes of prefix announcement may be routable on the public Internet: see routing, peering.The blocks numerically at the start and end of classes A, B and C were originally reserved for special addressing or future features, i.e., 0.0.0.0/8 and 127.0.0.0/8 are reserved in former class A; 128.0.0.0/16 and 191.255.0.0/16 were reserved in former class B but are now available for assignment; 192.0.0.0/24 and 223.255.255.0/24 are reserved in former class C.While the 127.0.0.0/8 network is a Class A network, it is designated for loopback and cannot be assigned to a network.See (RFC 5735 Special Use IPv4 Addresses)In common usage, the "host all zeros" address is reserved for referring to the entire network, while the "host all ones" address is used as a broadcast address in the given subnet; this reduces the number of addresses available for hosts by 2. This explains the reference to /31 networks as "Rarely Used," as the only possible addresses on a /31 network are "host all ones" and "host all zeros." RFC 3021 creates an exception to the "host all ones" and "host all zeros" broadcast usage to make /31 networks usable for point-to-point links. In practice, however, point-to-point links are still typically implemented using /30 networks, or occasionally by /32 and point-to-point explicit host routes.[citation needed] There is generally no technical advantage to /31 versus /32, although one or the other may be more convenient based on other issues. A /30 is always wasteful and has as its sole advantage that it behaves "as expected" for any other subnetwork.".
- IPv4_subnetting_reference wikiPageID "291784".
- IPv4_subnetting_reference wikiPageRevisionID "590592321".
- IPv4_subnetting_reference hasPhotoCollection IPv4_subnetting_reference.
- IPv4_subnetting_reference subject Category:IPv4.
- IPv4_subnetting_reference subject Category:Internet_architecture.
- IPv4_subnetting_reference subject Category:Network_addressing.
- IPv4_subnetting_reference comment "In the IPv4 address space certain address blocks are specially allocated or reserved for special uses such as loopback interfaces, private networks (RFC 1918), and state-less autoconfiguration (Zeroconf, RFC 3927) of interfaces. Such addresses may be used without registration or allocation from Regional Internet Registries (RIRs).".
- IPv4_subnetting_reference label "IPv4 subnetting reference".
- IPv4_subnetting_reference label "Maska podsieci".
- IPv4_subnetting_reference label "Máscara de red".
- IPv4_subnetting_reference label "Máscara de rede".
- IPv4_subnetting_reference label "Netmask".
- IPv4_subnetting_reference label "Netzmaske".
- IPv4_subnetting_reference label "Subnet mask".
- IPv4_subnetting_reference label "Маска подсети".
- IPv4_subnetting_reference label "サブネットマスク".
- IPv4_subnetting_reference sameAs Maska_sítě.
- IPv4_subnetting_reference sameAs Netzmaske.
- IPv4_subnetting_reference sameAs Máscara_de_red.
- IPv4_subnetting_reference sameAs Azpisare-maskara.
- IPv4_subnetting_reference sameAs Masker_subjaringan.
- IPv4_subnetting_reference sameAs Subnet_mask.
- IPv4_subnetting_reference sameAs サブネットマスク.
- IPv4_subnetting_reference sameAs Netmask.
- IPv4_subnetting_reference sameAs Maska_podsieci.
- IPv4_subnetting_reference sameAs Máscara_de_rede.
- IPv4_subnetting_reference sameAs m.01qp4t.
- IPv4_subnetting_reference sameAs Q1245638.
- IPv4_subnetting_reference sameAs Q1245638.
- IPv4_subnetting_reference wasDerivedFrom IPv4_subnetting_reference?oldid=590592321.
- IPv4_subnetting_reference isPrimaryTopicOf IPv4_subnetting_reference.