Risks can range from hostile intruders to untrained users who download Internet applications that have viruses.
Hostile intruders can steal data, change data, and cause service to be denied to legitimate users.
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can include network hosts (including the hosts' operating systems, applications, and data), internetworking devices (such as routers and switches), and network data that traverses the network.
Less obvious, but still important, assets include intellectual property, trade secrets, and a company's reputation.
Another tradeoff is that security can reduce network redundancy.
If all traffic must go through an encryption device, for example, the device becomes a single point of failure. Security can also make it harder to offer load balancing.