Ingress filtering is the process of filtering traffic entering the network from outside.

• A. True
• B. False
• C. It depends on the device
• D. Only for VPN traffic

Answer: (A)

Ingress filtering means inspecting and controlling traffic as it enters a network from external sources. This is typically done at the network edge with routers or firewalls, applying policies to drop harmful or unauthorized inbound packets and to block traffic that shouldn’t be allowed into the internal network. The goal is to prevent attacks and spoofed or undesired traffic from reaching internal hosts, making it a proactive defense for inbound connections. It covers all inbound traffic, not just VPN traffic, and isn’t limited to a single device—any capable device at the network boundary can implement it. Because these points align with the statement, it is correct.