I am studying a course about computer networking and again I stumbled upon a section that raised a question. I found very helpful people in this forum and I hope you can help me once again. During the lesson I was given the IP address example: 10.0.1.10 and I was told that the first couple octets are for the network ID, the third is for the subnet ID and the fourth for the Host ID.
But I'm confused. This is a Class A IP address so the network ID should only be the first octet. Why is it including also the second one? Am I missing something? Thank you!