Eicon Networks S92 Uživatelský manuál stáhnout pdf (Strana 115)

YuChakTinMichael‘sGIACGCFWProjectAssignment

Page 115

ISAServersupportstwomajortypesofcaching:HTTPandFTP.Thereisalwaysa

tradeoffbetweennetworktrafficandcontentupdates.Ifthecachedobjectsaretobe

keptinthecacheforalongerperiodoftime,performancewillincreasebecauseless

outgoingtrafficisrequired.However,thecachedobjectsmaybecomeoutdated. The

settingscanbeadjustedintheformofTTL.AsdescribedbyWebopedia.com,

“ShortforTimetoLive,(TTLis) afieldintheInternetProtocol(IP)thatspecifies

howmanymorehopsapacketcantravelbeforebeingdiscardedorreturned.”

21

http://www.webopedia.com/TERM/T/TTL.html

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Eicon Networks S92 Uživatelský manuál Strana 115