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2. IM Security and Firewalls. IM typesIM vulnerabilitiesNew IM productsFirewallsNAT, PATPacket filteringProxy ServerStateful packet inspectionAccess control lists. 3. IM types. Two basic types of IM:Enterprise IMConsumer IMIMs in use today are:AIM (AOL IM)MSN MessengerYahoo MessengerI
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