You might find from time to time, your Internet connection cut out, cuts in and out, or slows down.
There are several things you can try to figure out the issue;
How to check on your Internet connection | ZDNet. Shows you several options, with links to online (free) services to help.
I also suggest keeping technical support numbers readily available near your computer in case you need their help. I even have it on my cell phone.
For our local area of Western Maryland, we have a number of ISPs. Click here for your area and click links to your ISP for contact information.