Which netfilter table contains built-in chains called INPUT, OUTPUT and FORWARD?
Which netfilter table contains built-in chains called INPUT, OUTPUT and FORWARD?
The netfilter table containing the built-in chains INPUT, OUTPUT, and FORWARD is the 'filter' table. This table is primarily used for packet filtering and is the default table for most iptables operations, dealing with incoming, outgoing, and forwarded packets.
B is correct! https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture