AP® Cybersecurity glossary
Default gateway
Also called: gateway
The address of the router on a host's own network, to which the host sends every packet addressed to another network.
Appears in the course and exam description (CED): 3.1.A.1
Why it matters in Unit 3
address resolution protocol (ARP) poisoning targets the ARP table on the default gateway, because the gateway delivers the traffic arriving from other networks; a poisoned table sends the target’s incoming traffic to the adversary.
Example
A laptop at 192.168.1.10 opens a website. The packet goes first to the router at 192.168.1.1, its default gateway.
Learn it properly, with a checkpoint Networks: hosts, packets and the devices that move them