Today's sophisticated networks have evolved well beyond simple file and print sharing. Likewise, enterprise systems are being asked to handle more sophisticated business applications and heavier processing loads. That's the reasoning behind our 3Com Fast Ethernet Secure Fiber NICs. Faced with an Internet filled with viruses and worms, companies appreciate how LAN security contributes to network performance and availability. Unfortunately, many have already learned the hard way that an unprotected network is vulnerable to hostile attacks, the kind that can bring day-to-day operations to a screeching halt and cost thousands of dollars(or more) in lost productivity.