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1 Edge Transport server role
An Exchange Server 2007 and 2010 server role that provides anti-spam and antivirus protection and applies messaging security policies to messages in transport between organizations by using a series of agents that act on messages as they are processed by the message transport components. This server role is deployed in the perimeter network outside the Active Directory directory service forest. Computers that have the Edge Transport server role installed handle all Internet-facing mail flow and provide Simple Mail Transfer Protocol (SMTP) relay and smart host services for the Exchange organization.English-Arabic terms dictionary > Edge Transport server role
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2 Access Control Server
A component of Cisco Identity Based Networking Services (IBNS) architecture that improves network access security for Cisco network devices. -
3 preset-to callback
A form of security in which a remote access server verifies users by calling them back at numbers supplied by the network administrator at the time user privileges are granted. Only a network administrator can change a preset callback number. This ensures that no one can borrow a user's password and connect to the server from a location other than the user's normal one.
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