There are two ways your employer can view your website browsing activity. The first is if the employer incorporates a proxy server. A proxy server is a central machine on the network that funnels all Internet usage traffic. The proxy server logs the client machine gaining access to the Internet, and it records the website on which the user browses. The logs create a trail of where you browsed on the Internet and for how long you browsed the website pages.
The second method is viewing your Internet browsing history on the local computer. Your browser saves the Internet web pages you have visited in a directory called your “cache.” The files saved indicate where you have visited on your computer. This is a simplistic way to check your history, but it is a good indication of where you visit on the Internet while at work.