This question is about spoofing. Tick all that is TRUE.

Group of answer choices

When UDP is used, IP spoofing is much harder, and usually impossible, to achieve

IP spoofing can mean that someone forges the source IP address of a packet. This makes certain kinds of Denial$-$of$-$Service attacks possible

Operators can prevent some effects of spoofing by using a firewall that drops all incoming packets if they come from an IP address that belongs to the local network

Operators can prevent IP spoofing by using a firewall that drops all outgoing packets if they come from an IP address that does not belong to the local network