FirewallDefinition: A computer connected both to the Internet and the local Hospital Information Network (HIN) that prevents the passing of Internet traffic, in the form of Internet Protocol (IP) packets, to the internal hospital network. Provides an added layer of protection against "hackers."
There are two kinds of firewalls: external, which protect all hospital systems form the outside world, and internal, which protect only selected systems. Firewall disadvantages: it restricts information transfer in both directions, and makes file transfer (ftp) and telnet (remote login) more difficult.
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