Why does separating bandwidth from latency matter to disaster recovery? Any
process, backup, or mitigation technique can be affected by network difficulties. Database
mirroring in particular is susceptible to latency issues. If network packets are taking
200 to 300 milliseconds to get from point A to point Q on a network, and database mirroring
is set to synchronous mode, users will see a definite lag when typing in data. More
often than not, latency is the cause of network problems rather than a lack of bandwidth
(unless you??™re connecting systems using a dial-up connection).
Name Resolution
The current Windows standard (Windows 2000 and later) for name resolution is DNS.
However, a number of features still require the older Windows Internet Name Service
(WINS) resolution. WINS and DNS are very different.
WINS maps a NetBIOS computer name to a specific IP address, recording it in a Jet
database (yes, that would be a Microsoft Access-type .mdb file). NetBIOS names typically
do not have an Internet-style name at the end. For example, you would have a name like
JAMESLAPTOP rather than JAMESLAPTOP.
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