Summary
TCP/IP provides some network services that simplify network installation, configuration, and use. Name service is one such service and it is used on every TCP/IP network.
Name service can be provided by a flat file called a host table, or by a distributed database. The host table for Internet host names is a simple text file named hosts. The host table for NetBIOS names is a text file called LMHOSTS. Most systems have a small host table, but they cannot be used in all cases because they are not scalable and do not have a standard method for automatic distribution. DNS, which is a TCP/IP standard, does scale. DNS is a hierarchical, distributed database system that provides host name and address information for all of the systems in the Internet. WINS, which is a Microsoft package, is a distributed database system for NetBIOS name resolution.
Simple Mail Transfer Protocol (SMTP), Post Office Protocol (POP), and Multipurpose Internet Mail Extensions (MIME) are the building blocks of a TCP/IP email network. SMTP is a simple request/response protocol that provides end-to-end mail delivery. Sometimes end-to-end mail delivery is not suitable and the mail must be routed to a mail server. TCP/IP mail servers can use POP to move the mail from the server to the end system where it is read by the user. SMTP can only deliver 7-bit ASCII data. MIME extends the TCP/IP mail system so that it can carry a wide variety of data.
Many configuration values are needed to install TCP/IP. These values ...
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