JSCalc

Every network administrator asks themselves this question sometime: How big a pool should I set? And if there’s a busy hour in my day, will … Read More

Over time, routing tables fills with extra routes. Whenever you bring up a new subnet, all the routers along the way has to check, advertise, … Read More

JSCalc-Blog.com’s MAC address format converter produces tidy and consistent outputs from all kinds of hardware addresses. Each network interface card are manufactured with a 48-bit … Read More

When you type 192.168.1.1 into your browser, it works. But if you were to try to pass that exact same address into a database query … Read More

Your computer masks the workings beneath in tidy dots and digits. You don’t often look directly at IP addresses for what they actualy are. But … Read More

Planning a network is one of those things where IPv6 addresses become abstract. They’re so big that your brain stops seeing them as real numbers. … Read More

Imagine you fold up a piece of paper in half again and again, creating smaller and smaller equal sections. That’s what happens when you split … Read More

Assigning IP addresses isn’t rocket science, though it does involve some math. On one hand, you need enough numbers for deployment. On the other hand, … Read More

Cisco network configurations use an ordinary subnet mask in some places, such as for interfaces. However, they uses an inverted mask in other places, such … Read More

This page has a broadcast address calculator. What’s it calculate? It gives you the answer to exactly one question: “Given a host and a subnet … Read More