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Private network
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===Loopback interface=== A special case of private link-local addresses is the [[Loopback#Virtual loopback interface|loopback interface]]. These addresses are private and link-local by definition since packets never leave the host device. IPv4 reserves the entire class A address block {{IPaddr|127.0.0.0|8}} for use as private loopback addresses. IPv6 reserves the single address {{IPaddr|::1}}. Some are advocating reducing {{IPaddr|127.0.0.0|8}} to {{IPaddr|127.0.0.0|16}}.<ref>{{Cite IETF|draft=draft-schoen-intarea-unicast-127-06}}</ref>
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