While I cannot see that this in security related in any way: As to your first question: 172 in binary should be 10101100, as you stated. This looks like a mistake in writing of the source you got the answer from. As to your second question: If you express the octets in decimal form with dots ...

I'm always concerned about the security of services I use. I'm even more concerned since security breaches have been happening more and more lately, and they always generate a lot of noise in the media. Now I'm already trying to secure my accounts to the maximal amount possible, like using 2FA w...