In this article we cover one of what I have found to be the most common stumbling blocks for individuals attempting to pass the CCNA. This comes from experience in helping several individuals through ...

Table 1. This table illustrates subnet masks. The number after the “/” in the CIDR notation indicates the total number of IP addresses available. Click here to see an enlarged diagram. Understanding ...

Hi. I have a rather technical and specific problem, and I know it's the wrong thing to do (especially since it doesn't work), but I'm trying to learn WHY it doesn't work. All subnets are 255.255.255.0 ...

If computers in an open network talk freely with one another and two computers start talking at the same time, you have a “data collision.” Collisions may be arbitrated via Carrier Sense Multiple ...

I'd like to take two parts of a class B address space, and express it in CIDR notation, if it can be done.<BR><BR>For example, I'd like to take 192.168.130.0 and 192.168.131.0 and represent them with ...

Subnets are used for many AWS tasks (like creating an EC2 VM), so Brien Posey sheds some light on common errors to end some of the frustration around subnetting. There are any number of tasks within ...

Have you learned to think and dream in hex yet? That is what you are going to have to look forward to as we transition to using IPv6. Because we will be working in hexadecimal numbers we may need a ...