Answer:
"Router screening" is the correct option.
Step-by-step explanation:
- A router that philters packets like a firewall. For certain instances, the whole firewall system is such a single scanning router.
- Often connected to a network stage as well as a container-filter firewall has been the scanning router firewall. This rather firewall operates by filtering protocol characteristics from received packets.
So that the above seems to be the correct approach.