When network signals cannot move beyond walls, they get stuck inside a limited space. You may think that this spells trouble, but actually, enclosing network signals in a small area, like a room or even a house, is able to help multiple users as well as gadgets to use the same band again. In addition to that, this stricture can help hold harmful intervention least possible. As a result, this lets the same frequency to be used without hampering each other.
If you think that Internet is something available for anyone in the world, you are wrong. Unfortunately, in the 21st century of mobile computing and extremely successful technological development, we still say that having the Internet is an ordinary thing