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Wednesday, 03 June 2015 / Published in Woo on Tech

Understanding how your internet works

Help your self!

Despite how dependent we all have become on it, the Internet still remains a mystery to most folks. There’s a good reason for it – it is complicated and for most, it’s not their job, nor their interest, to have a comprehensive grasp of how data gets from point A to point B. But just like other things we usually take for granted – water, electricity, our cars – when it stops working, we really notice and chafe at any delays to restore normal service. In the case of a water or car problem (most of us are smart enough to not mess with electricity or natural gas!), we’ll try to roll up our sleeves, pop the hood and grab a wrench, but calling a professional is probably the safest and most effective way to get things working again. This is also the case with internet service, but believe it or not, there are some things you can do to troubleshoot and possible restore service, as long as you understand the basics of how the internet is delivered and connected to your location.

Let me break it down for you. Don’t worry, I’ll keep it simple.

First off, you have to have an Internet Service Provider (ISP). It’s important to know who this is, what your account number is, and what the Customer Support number is for that service. You should have this info printed out and easy to find, because, guess what? When the internet is down, it might be hard to look up that info.

Your ISP will deliver internet through a number of different physical types of circuits. The most common are fiber, coax (commonly known as “cable”), and twisted-pair copper. This last one can take various forms, many of which you should be familiar – T1’s, DSL and Ethernet over Copper (EoC) – are all delivered via simple copper wire. This physical circuit will be “terminated” (ie. plugged into your location) in an Minimum Point of Entry (MPOE) or a Demarcation Point (DMARC) which, depending on the type of building, can be a basement, phone closet, a box on the side of your house, or a cable drilled right through the wall into your living room. If you own the property in question, it’s important to know where your internet comes into your property.

That circuit, whatever its type, will actually plug/screw into some sort of device, most commonly referred to as a modem or a data services unit (DSU), but there are several other types and names for this piece of equipment. Essentially, they all have one function: connect the ISP to your property.

From the modem or DSU, your circuit is connected to a router. The router is where the magic happens, and is the most important device on your network, from both an internet as well as a local network perspective. Sometimes, depending on the service, the modem/DSU and router are combined into a single device. This form is often found in small offices and residential installs of coax service (from someone like Time Warner, Comcast, Spectrum, etc.), and is often just called a cable modem or simply a router.

Here’s where things get tricky: depending on your service agreement with your ISP, the router may be managed by them, or it may be your own equipment, and both situations can be found in any size business environment. It’s a safe bet that if your company is big enough to have full-time IT staff, your company probably owns and manages its own router. Either way, make sure you know who’s responsible for the router before touching it.

The internet gets conveyed to your devices through two different means: via wire (usually through an Ethernet cable) or via wi-fi. Wired ethernet is delivered via devices called switches (often incorrectly called hubs, which are no longer used), and Wi-fi through access points. In both cases, that internet is delivered to a network interface on your device, which can take the form of an ethernet jack or an antennae. To make things even more confusing, it’s very common to find routers that are also switches and access points, but which may also connect to additional switches and access points, depending on how large your local network is and how your office is designed.

Made it this far and ready to try your hand at network troubleshooting?

When troubleshooting the most basic problem of internet service, ie. it’s not working, there are a few simple questions to ask that can point you to the possible source of the problem:

  1. Is everyone at that location unable to access the internet? If no, it might be a problem with one of the main devices like the modem/DSU or the router. Check those devices first. If they appear to be operating normally (no flashing yellow or red lights), then call your ISP to make sure service is not down in your area or location. They may or may not instruct you to cycle power on these devices, so make sure you call from a phone that can reach where those devices are connected.
  2. Wi-fi service is not working properly? If your wi-fi is delivered by separate access point, cycling power may resolve this issue. In larger office environments, this may not be possible as these devices are typically mounted out of reach, and may be physically protected from tampering. In those cases, contact the responsible support person. If your router handles the wi-fi, you may need to reboot the router to restore normal service. In most cases, cycling power on these devices will not harm them nor make them lose their settings, but make sure you know who’s responsible for managing the device before rebooting it.
  3. Single or small-cluster of wired devices down? Look for a problem with either the ethernet cable (snugly plugged in on both ends? no exposed wires or busted tabs on the cable ends?) or a local switch. Many small offices use switches to distribute network in cubicle and multi-occupant spaces. Look for green/amber lights on both switches and network interfaces. No lights usually means the network signal isn’t getting through for some reason.
  4. Lastly, did you reboot the device in question? Frequently, if the problem is isolated to a single machine (computer, printer, mobile device), rebooting may solve the problem, especially if it’s wi-fi related.

Tried all of the above and still stumped? Call in a professional!

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Tagged under: access point, internet, isp, network basics, router, switch, troubleshooting, wi-fi

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1 Comment to “ Understanding how your internet works”

  1. In case you missed it – Get Tech Support Now – C2 Technology Partners says :Reply
    November 1, 2016 at 8:26 pm

    […] Understanding how your internet works – It’s nearly 2016. Don’t you think it’s about time you learn how your internet works? […]

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