What logic do routing rules use in making decisions?

• A. And
• B. Or
• C. Not
• D. Xor

Answer: (A)

Routing decisions rely on all specified conditions being true for a rule to apply. This means each criterion—such as destination subnet, source address, protocol, port, or time window—must be satisfied for the rule to match. If any one condition isn’t met, the routing rule doesn’t fire and the router uses the next rule or a default route. This all-together logic ensures precise, predictable paths: a rule only takes effect when every required condition is met.

If you used OR, a match could happen if any one condition is true, which could send traffic down unintended paths. NOT would invert a condition, which is useful for exclusions but isn’t the usual way to determine a primary match for routing. XOR would fire only when exactly one condition is true, which doesn’t align with the common need to require all relevant criteria to be satisfied for a route.