I started programming at time of serial connection and made my way to ip with try and error until it works. At first you had a backup serial connection for emergency but new low cost plc are only relying on ip port...When you lose it, sometimes it is very difficult to get it back online...
I learned that the first 3 parts of the ip adress should be equal between device connected toghether on a standard switch but is it because of the mask that a different adress level doesn't see the other one ?
What is the real use of mask and how doest it filter the ip adress values?
I often see 255.255.0.0 or 255.255.255.0, which one is better to use ?
Thanks
I learned that the first 3 parts of the ip adress should be equal between device connected toghether on a standard switch but is it because of the mask that a different adress level doesn't see the other one ?
What is the real use of mask and how doest it filter the ip adress values?
I often see 255.255.0.0 or 255.255.255.0, which one is better to use ?
Thanks