What is the difference between RAS Server and RADIUS Server?

Hey i have a bit confusion between a RAS Server and RADIUS Server..

Are both of them are used for remote access connectivity or something different and what are the purpose of deploying any or both the above servers. And how does it works...



Do a router provides the same function as these servers..

Thank all of you in advance

bye

bhavanWhat is the difference between RAS Server and RADIUS Server?
RAS is routing and remote access server as you mentioned

RADIUS (Remote Authentication Dial In User Service ) is AAA (authentication, Authorization and Accounting) server, it has different rule, it is used as central DB for authentication, for example if you have 100 user that need to access some devices, instead of storing all the 100 user profile on each device , you store it in on a radius server, and all device will contact it when it need authentication, (of course these devices should support radius ).



router will do routing part of RAS,and do it more efficiently and may provide remote access as additional feature,