Which statement about the displayed IP filter on a Nokia 7750 SR is TRUE?

The statement that traffic from network 1.2.3.0/24 is discarded is true because IP filters on devices like the Nokia 7750 SR typically control the flow of packets based on specified criteria, which may include source or destination IP addresses, among others. If the filter is configured to specifically discard traffic originating from a certain IP range, such as 1.2.3.0/24, then it will not allow packets from that source to pass through, thereby effectively preventing any traffic from that network from being transmitted.

Understanding the structure of IP filtering helps clarify why this statement holds true. Filters often define rules based on source or destination, so if the rule in question explicitly specifies a discard action for the source network, it aligns with the observed behavior towards data packets originating from that address block.