Virtual Private Network (VPN) Question: Download Questions PDF
What kind of performance issues does VPN raise?
Encryption takes more horsepower than sending data in the clear. It really shows up on mobile PCs transmitting large hunks of data — for example, a PowerPoint presentation — over a dial-up phone line. Firewalls and other server systems should employ hardware crypto engines. With these there are no performance issues. I expect that this functionality for mobile PCs will migrate to PC cards with crypto engines. When will this happen? Within the next 18 months.
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