Address-based packet filtering firewalls can _______.

Question

BlackTom AI · Accepted Answer

The question asks what address-based packet filtering firewalls can do.
Option a: 'all of the above' would imply that the firewall can both protect integrity and confidentiality as well as block certain sources and ports. However, while packet filtering can block traffic from specific addresses or ports, it does not inherently guarantee integrity or confidentiality of connections, so this combination is not accurate.
Option b: 'protect integrity of network connections' suggests that the firewall ensures data integrity. Basic packet filtering by address and port does not verify or guarantee the integrity of the payload or the connection; it primarily controls access based on rules, not on integrity checks.
Option c: 'block certain source addresses and ports' correctly describes a primary function of address-based packet filtering firewalls: they inspect header information and drop packets from or to specified source addresses or ports according to configured rules.
Option d: 'protect confidentiality of network connections' would require encryption or strict privacy controls. A typical packet-filtering firewall does not provide confidentiality by itself; it may block traffic but does not encrypt data or hide content.
In summary, among the choices, option c accurately reflects the core capability of address-based packet filtering firewalls, while the others mischaracterize or overstate what such firewalls accomplish.

FIT1093_S2_2025 Week 8 MCQ: System Security - Entity Authentication & Access Control

Address-based packet filtering firewalls can _______.

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