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【メモ】IPアドレスとか

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IPアドレス

グローバルIPアドレス

クラス IPアドレス 用途
A 1.0.0.0 ~ 9.255.255.255
11.0.0.0 ~ 126.255.255.255
大規模ネットワーク
B 128.0.0.0 ~ 172.15.255.255
172.32.0.0 ~ 191.255.255.255
中規模ネットワーク
C 192.0.0.0 ~ 192.167.255.255
192.169.0.0 ~ 223.255.255.255
小規模ネットワーク
D 224.0.0.0 ~ 239.255.255.255 マルチキャストアドレス
E 240.0.0.0 ~ 255.255.255.255 未割当

プライベートIPアドレス

クラス IPアドレス 用途
A 10.0.0.0 ~ 10.255.255.255 -
B 172.16.0.0 ~ 172.31.255.255 -
C 192.168.0.0 ~ 192.168.255.255 -

予約済みIPアドレス

IPアドレス 用途
224.0.0.2 HSRPv1のHelloパケット udp/1985
224.0.0.5 OSPFのHelloパケット
224.0.0.6 OSPFのDR/BDRルータ
224.0.0.9 RIPv2
224.0.0.18 VRRP Advertisement
224.0.0.10 EIGRPのHelloとUPDATEパケット
224.0.0.102 HSRPv2のHelloパケット udp/1985
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