computer digg

You must have heard about the TCP/IP protocol. In all kind of transactions the internet is the key product. You will definitely be able to find out that at each layer there is some protocol working. Let me also tell you that you will definitely find out that there is some sort of protocol working at each level. You will be quite thrilled to know that each layer has its own importance and you will not be able to install one layer without installing the previous layer. Now as far as the checkpoint is concerned it is definitely related to security measures.