Network 250-DHCP Essay
Bryant & Stratton
Mr. Jacob Hoppe
March 24, 2011
What is DHCP?
Dynamic Host Configuration Protocol is a network protocol that enables a server to automatically assign an IP address to a computer from a defined range of numbers, configured for a given network. (University, 2009(Copyright 2005-2010))
Allows network administrators to centrally manage and automate the assignment of Internet Protocol (IP) addresses in an organization’s network. Using this ‘internet protocol’, each computer that can connect to the internet needs a unique IP address, which is assigned when an Internet connection is created for a specific computer. Without DHCP, the IP address must be entered manually at each computer in an organization.
A new IP address must be entered each time a computer moves to a new location on the network. DHCP lets a network administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place on a network.
DHCP uses the concept of a “lease” or amount of time that a given IP address will be valid for a computer. The least time can vary depending on how long a user is likely to require the internet connection at a particular location. It’s especially useful in education and other environments where users change frequently. Using very short leases, DHCP can dynamically reconfigure networks in which there are more computers than there are IP addresses available. The protocol also supports static addresses for computers that need a permanent IP address, like Web servers do. When you deploy Dynamic Host Configuration Protocol servers on your network, you can automatically provide client computers and other TCP/IP based network devices with valid IP addresses. You can also provide additional configuration parameters these clients and devices need, called DHCP options that allow that allow them to connect to other network resources such as DNS servers, WIN servers and routers. (DHCP Server, 2011) A DHCP server is a computer running the DHCP Server service that holds information about available IP addresses and related configuration information, as defined by the DHCP administrator, and responds to requests from DHCP clients. There is a list that is comprised of “managed entities” that are included in this managed entity. There are as follows; Dynamic Configuration Host Protocol/NAP Components,
(NAP) Network Access Protection is a health policy creation, enforcement, and remediation technology that is included in Windows Vista and Windows Server 2008. With NAP, system administrators can enforce health requirements, which can include software requirements, security update requirements, required computer configurations and other settings.
Dynamic Host Configuration Protocol (DHCP) enforcement includes a DHCP NAP enforcement server component and a DHCP NAP enforcement client component. By using DHCP enforcement, DHCP Servers can enforce health policy requirements any time a computer attempts to lease or renew an IP address configuration on the network. DHCP enforcement is easiest enforcement to deploy because all DHCP client computers must lease IP addresses. A DHCP NAP requires proper NPS/RADIUS configuration.
Scopes typically define a single physical subnet on your network to which DHCP services are offered. Scopes are the primary way for the DHCP server to manage distribution and assignment of IP addresses and any related configuration parameters to DHCP clients on the network.
A DHCP scope is the consecutive range of possible IP addresses that the DHCP server can lease to clients on a subnet. DHCP Runtime
DHCP runtime includes normal operating functions of the DHCP server. Examples of these functions include lease issuance and rogue detection DHCP Database
The Dynamic Host Configuration Protocol service database is a dynamic database that is updated as...