public address

[leepeiwai]

The answers for the question below are 1,4,6

Why 5. is not a valid public address? which i think it is a class C network 192.15.301.0 /24.

Which three addresses are valid public addresses? (Choose three.)
1.198.133.219.17
2.192.168.1.245
3.10.15.250.5
4.128.107.12.117
5.192.15.301.240
6.64.104.78.227

[Giuseppe Larosa · Accepted solution]

Hello Peiwai,

dotted decimal notation shows 32 bit IPv4 addresses as a.b.c.d

so between two dots . you can see a number betweeen 0 and 255.

301 in third byte does not fit in 8 bits and so answer 5 is not a valid IP address, regardless of being public or private

Hope to help

Giuseppe

[leepeiwai]

That is a catch Thanks again Giuseppe