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Title Description. Microsoft Windows Server is a wonderful operating system. It has a very secure platform, both locally and on the Internet, a user-friendly interface that is similar to Windows 98, Plug and Play capabilities that can be used without the worry of configuration, and an excellent search function.
This Virtual Training Company tutorial is a wonderful resource in preparing for the Microsoft Certification Exam Another option for fault tolerance is the use of DHCP clusters. By replacing all the DHCP servers with DHCP clusters, the design benefits from virtually guaranteed uptime, short of a major disaster such as a power failure or fire. To take fault tolerance even further, the designer can combine clusters with scope splitting.
This ensures that the DHCP service will be available at all times. A major factor in designing a fault tolerant plan is cost.
Each of the scope splitting situations calls for an additional DHCP server. Using clusters drives the costs up further still, since a cluster must contain a minimum of two nodes.
Once server placement and fault tolerance is completed, the designer must begin creating the scopes. In this scenario, there are a total of 19 subnets. Through scope splitting, there are a total of 38 scopes.
Table 4. While creating the scope, the designer needs to calculate appropriate lease durations. For most of the scopes, the default lease duration of 8 days is appropriate.
By extending the lease duration, the designer guarantees that DHCP clients in those sites will continue to have valid IP address leases in the event of a WAN link failure. Double the default lease duration for these scopes to 16 days. Lease durations may also need to be modified if the subnet utilizes the roaming allocation method. For example, if there is a group of conference rooms in the Corp HQ site, the designer can designate one subnet for these rooms. The scope servicing the subnet could have its lease duration set to 1 hour.
Both of these situations are extremely unlikely, however. The most likely situation is that where the Windows server is functioning as both a router and a DHCP server. By default, when DHCP first starts on a multihomed server, the service binds to the first network interface. If this first network interface has a static IP address which is required to run a DHCP server , the service binds to that card as normal.
However, if the first network interface is using a dynamically assigned IP address, the service does not bind to that interface.
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