On Sat, 5 Aug 2006, Pete Holsberg wrote:
Can you give a few examples of QoS-aware applications? Thanks.
I don't have any specific examples. But in general, anything in
"real time" would qualify. VoIP would not sound good if packets
are dropped or arrive out of sequence. Same with streaming
video/audio, they would seem "choppy" or broken-up. Buffering
may be (is) used to mitigate some of these problems, but then
delay [latency :) ] is introduced, which may or may not matter
depending on the situation.
OTOH for email, most web browsing, ftp, etc, dropped/corrupted
packets can be re-xmitted and out of sequence packets can be
resequenced with no detriment to the end result. Generally,
they are not considered time critical or time dependent apps.
QoS is an "end-to-end" concept, intended for traffic that needs
to get through congested network pipes (which also have to be
QoS-aware) within certain time constraints. There is much more
to QoS than simply reserving bandwidth, such as "prioritizing"
traffic.
"QoS is not used in our office environment" is not a valid
reason to pursue the invalid "reclaim the *unused* (reserved)
20%" tip. Actually there are no valid reasons to pursue any
invalid tip.
What the IT person is pursuing is just a waste and will NOT
make any difference.
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