When Berkley University began including TCP/IP in its version of UNIX, the protocol suite entered the mainstream. Unfortunately, it entered the mainstream as a UNIX-oriented set of protocols and services, resulting in a decidedly non-PC-friendly environment. For example, many of TCP/IP's control files were stored in UNIX' "/etc" directory, which is not a common directory on any other platform.
One of these control files is called "HOSTS" and it provides the name-to-address lookup services discussed above. There are other files here as well that also affect the ease-of-use aspects of operating a TCP/IP network. For example, the "NETWORKS" file maps IP network numbers to locally-definable names. The "SERVICES" file and the "PROTOCOL" file also provide name-to-number matching services for other functions.
For more information on the HOSTS database file, refer to section C.2.1 HOSTS. For more information on the SERVICES database file, refer to section C.2.2 SERVICES. For more information on the NETWORKS database file, refer to section C.2.3 NETWORKS.
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