Define security.

• A. Availability of network services
• B. How protected the network is, including information transmitted over the network
• C. The color of cables used
• D. The number of routers in the network

Answer: (B)

Security in a network context means protecting data and resources from unauthorized access, tampering, and disruption, while keeping the network operating safely. The best description emphasizes how protected the network is, including information transmitted over the network, because it covers protecting data both in transit and at rest and the measures that enforce that protection (like encryption and access controls). This aligns with the idea of the CIA triad—confidentiality, integrity, and availability—which guides why we implement protections. The other choices don’t fit as well: the color of cables is irrelevant to protection, and the number of routers doesn’t by itself indicate how secure the network is. Availability alone describes uptime, not overall protection.