Choose the best answer:

Relative to inside a network, a NAT Firewall combo commonly works by$...$

Question $5$ options:

Blocking outbound traffic but allowing inbound traffic when there is no established connection between hosts

Blocking inbound and outbound traffic

Allowing outbound traffic but blocking inbound traffic

Allowing outbound traffic but blocking inbound traffic when there is no established connection between hosts

Allowing inbound traffic but blocking outbound traffic when there is no established connection between hosts