Which of the following terms refers to the method that allows or restricts specific types of packets from crossing over the firewall?

Question

Options

• AHacking
• BPacket filtering
• CWeb caching
• DSpoofing

• A
  6% (1)
• B
  89% (16)
• C
  6% (1)

Explanation

Packet filtering (B) is the firewall method that inspects incoming and outgoing packets and allows or blocks them based on defined rules - such as source/destination IP, port, or protocol. It's the foundational mechanism firewalls use to enforce network access control.

Why the others are wrong:

• A. Hacking - an unauthorized intrusion technique, not a firewall method.
• C. Web caching - stores web content locally to speed up access; unrelated to filtering traffic at a firewall.
• D. Spoofing - a deceptive attack where a source address is forged; it's something firewalls protect against, not a firewall method itself.

Memory tip: Think of a firewall as a mail room guard who checks each packet (envelope) against a list of approved senders and recipients - that inspection process is packet filtering. If it's not on the list, it doesn't get through.

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