Describe the concept of redundancy in C2 networks and give an example.

• A. Redundancy reduces the number of communications channels to simplify networks.
• B. Redundancy means keeping a single backup system in a closet.
• C. Redundancy is unrelated to continuity of operations.
• D. Redundancy provides alternate paths or nodes to ensure continuity; e.g., multiple communications channels (satellite, fiber, radio) with failover.

Answer: (D)

Redundancy in C2 networks is about having multiple independent paths and nodes so operations can continue even if part of the network fails. This means designing the system with diverse routes and automatic failover so a single outage doesn’t break communications.

An example is using several communications channels—satellite, fiber, and radio—with failover. If one channel goes down, traffic automatically shifts to the others, maintaining command and control access and ensuring continuity of operations.

Why the other ideas don’t fit: reducing the number of channels makes the network less resilient rather than more, because there’s less alternative pathways to take when failures occur. Keeping a single backup in a closet isn’t true redundancy, since it doesn’t provide ongoing, automatic failover across multiple paths. And saying redundancy isn’t related to continuity of operations misses the fundamental purpose: the whole point is to preserve operations even when parts fail.