
A website must perform maintenance at some point in its existence to keep the information up-to-date and to keep the website free from bugs and viruses. A simple content update, such as new contact details, new graphic images and the like, does not affect the whole website that much. The website is still accessible, even if the whole text content of a webpage is being changed. However, there are times that a website must go offline for a short period of time in order to perform the necessary upgrade or to fix website errors.