So far we’ve discussed networks and protocols. Both have been fairly general topics. but now we come to something a little more specific: Internet Protocol (or IP) addresses, specifically with a focus on IPv4 (Internet Protocol Version 4).
A protocol, in general terms, might be described as a formal set of rules to govern interactions between two entities. Another way to think of them might be like shared languages. For example, if I’m speaking Inuktitut and you’re speaking Swahili, our conversation likely won't be very fruitful.
What exactly is private cloud, and how is it different from public cloud services?
I think one way to look at it is that private cloud is the sort of cloud you would choose to build for yourself. Based on an industry standard platform, fully compatible with your existing Enterprise applications, secure and isolated from the public Internet.
Okay, call me a grammar nerd if you'd like, but when we talk about the Internet, it should be capitalized.
A network, in its most basic sense, is just a collection of things that can communicate with each other.
In the IT world, networks exist to exchange information between individual devices, or “nodes”. This could be as simple as two devices directly connected to each other (we call this a Point-to-Point network) or it could be hundreds or thousands of devices connected with various switches and routers.
You may have heard the Internet described as “a network of networks”. This is in fact quite accurate. (Or perhaps “a series of tubes”, which, although not entirely inaccurate, is a whole different discussion.)
The routing protocol that allows us to navigate these interconnected networks is known as Border Gateway Protocol, or BGP. In BGP parlance, each of the individual networks that make up the Internet is known as an Autonomous System or AS.
Do you remember being admonished as a child for holding the refrigerator door open? Or what about air conditioning – we often hear that raising our thermostats slightly in the summer can result in significant savings.
The data centre is no different in terms of energy conservation strategies; we just do things on a much larger scale.
When the lights go out, we often rely on Uninterruptible Power Supply (UPS) or “battery backup” systems to keep our computers running. From small and inexpensive home or office units to multi-megawatt data centre installations, these systems all perform the same basic task; they use batteries to supply power to computers and other IT equipment for brief periods when utility power is down. But that’s where the similarity ends - there are some important differences between consumer and enterprise UPS systems.
In my previous post, we explored the difference between Volt-Amps and Watts, and came to the conclusion that, with today’s power-factor-corrected equipment, these two measurements are usually nearly identical.
If you’re seriously considering moving from an in-house server room to a colocation facility, you'll likely have some questions about power. What is a Volt-Ampere, you may be asking, and how is a VA rating different from a power rating in Watts?