Abstract
Some of the most commonly deployed network services to a system are Dynamic Host Configuration Protocol (DHCP), Domain name server (DNS), Network Time Protocol (NTP), and the interoperability with Microsoft Windows systems. DHCP servers are used to configure Transmission Control Protocol/Internet Protocol (TCP/IP) parameters for a host as they connect to a network, including IP address, name servers, and configuring the routing, including the default route. The DNS resolves machine names to an IP address or it converts from the IP address to the name. Resource records (RRs) are the most basic part of the Domain name system and have a number of basic elements to them that include type, Time to Live (TTL), class, and possibly some data specific to the type of record. The NTP synchronizes computer clocks over a network, including the Internet. An NTP client is implemented as a continuously running daemon process, which runs in the kernel space due to the sensitivity of timing. The main configuration file is /etc/ntp.conf and defines the servers to synchronize to, as well as what networks are allowed to synchronize to, a server.
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