An Introduction to DHCP
DHCP stands for dynamic host configuration protocol. What it does is dynamically assign network settings from a server. In other words, instead of having to configure the parameters related to how your computer communicates with a network, it happens automatically.
Assigning an IP address dynamically is the most basic piece but there is a lot more to DHCP. This includes the netmask, host name, domain name, gateway and name servers. In addition, DHCP can supply other information such as a time server.
Many people are anti-DHCP, because they see it as a way that an ISP offers you an IP address that changes. This, of course, makes it difficult to advertise a server. On the other hand, DHCP can save you a lot of ongoing configuration work within your company or organization.
Besides the ISP-provided DHCP servers, they commonly exist in inexpensive router boxes. Netgear, Linksys and other vendors offer these systems with multiple LAN ports, an 802.11b wireless interface or both. The Netgear RP114 is an example of a wired LAN, while the Linksys WAP11 is an 802.11b type. Many other product choices are available. When you use one, the router box becomes the system that the ISP knows about, and all of your real computers hide behind this box.
Hide? Effectively, yes.
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