IP address class, Private IP and multicast IP address

항상 생각할때만 기억이 가물가물해서 한번 적어봤습니다. 

틈날때마다 한번씩보고 상기 시켜야죠. ^^


IP address class ? 

Class A : 0.0.0.0 ~ 127.255.255.255
Class B : 128.0.0.0 ~ 191.255.255.255
Class C : 192.0.0.0 ~ 223.255.255.255
Class D : 224.0.0.0 ~ 239.255.255.255
Class E : 240.0.0.0 ~ 255.255.255.255


what is a private IP Address ? 

Class A :  10.0.0.0 - 10.255.255.255

Class B :  172.16.0.0 - 172.31.255.255 

Class C :  192.168.0.0 - 192.168.255.255 

What is the multicast IP address ? 

   224.0.0.6 - OSPF 

   224.0.0.7 - OSPF 

   224.0.0.9 - RIP

   224.0.0.10 - EIGRP