October 2002
Intermediate to advanced
344 pages
10h 17m
English
Content preview from The ABCs of TCP/IP, 2nd Edition
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Applications and Built-in Diagnostic Tools
135
Time Consideration
If a fully qualified domain name cannot have its IP address resolved by the
local DNS, one or more additional servers must be queried. This means that
datagrams conveying address resolution information will flow over relatively
low-speed WAN connections for which the time delay then depends on the
operating rate of those connections and other activity flowing on each con-
nection, as well as the processing being performed by routers that form the
WAN. Because the DNS resolution process on a host results in the setting of
a timer, if too much time occurs during the resolution process, the ...
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