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Other network Server roles include a Database Server, such as the SQL Server, where we can store tremendous amounts of information that clients can have access to from anywhere in the network - as long as they have right username and password and have the right security requirements. An Application Server stores information but also allows the client to process the information on the Application Server itself. So a SQL database is a Database Server in an Application Server, because the client simply issues the query from the front-end, and all of the processing is actually done on the backend. And this frees up the resources of the client computer to do other things while that information is being processed. For example, a client that works for AT&T, might say that they need a list of all of the people who are over 40 years old and in the 401(k) plan. And that information will then be processed by the SQL Database Server. And when all that information is complete, it will be sent back to the client so that they work with it. But during the time it's processed, it's actually being processed on the Server, which frees up the resources of the client. Other dedicated servers are Mail Servers: this is typically a dedicated Server that is designed for the e-mail exchange in an company. In fact, exchange Server is one of the most common Mail Servers. There are others, but typically these are dedicated computers for e-mail exchange. A File Transfer Protocol Server or FTP Server might be used if large amounts of data need to be passed through an organization, and especially through the Internet from one part of an organization to another. A File Transfer Protocol Server can be used as a dedicated Server to make sure that that information is transferred in an orderly way. A Remote Access Server provides access through Telephone lines, perhaps through ISDN or DSL or cable modems, but provides access to people from their homes or from other parts of the organization outside of where the Remote Access Server is actually located. And the Remote Access Server can be set up with tremendous requirements for security; in other words people don't get in to the organization until they go through all of the security checks that need to be in place before they can get into the organization. They might have to authenticate in a certain way and they might have to encrypt data in a certain way. But Remote Access servers will then allow a client who does meet the security requirements to work with information within the organization, just as if they were sitting at their desk. Now it might be a little bit slower depending on how much bandwidth they have, but they will be able to get access to all of the resources that they need to have and all of the resources that they would have if they were sitting right at their desk, as long as the Administrator sets up the Server correctly. Remote Access servers are tremendously flexible in the way that they can be set up. And typically these are used as a dedicated Server for the network services of remote access. In our next section we will further discuss network Server roles.