Access server - provides remote access to the local lan. Windows has a remote access server software that runs under NT and uses special multi modem cards. ISP's use these to offer Internet Dial-up. Perform voice mail functions, sends and receives voice mail AND real-time calls to network nodes. Do not require a server at all.
Administration is done at each client.
PLUS the user's actions of running other software on the peer to peer machine, slows the machine down more. Client - the workstation that the user sits at 2. Network Interface cards 4. Sometimes called a repeater. Must be installed for the PC to operate on conventional lans 2.