N10-005 · Question #774
Which of the following describes blocking traffic based upon the Layer 3 sources address of the traffic?
The correct answer is B. IP filtering. IP filtering controls network traffic by permitting or blocking packets based on their Layer 3 (Network layer) source or destination IP addresses.
Question
Which of the following describes blocking traffic based upon the Layer 3 sources address of the traffic?
Options
- APort filtering
- BIP filtering
- CMAC filtering
- DApplication filtering
How the community answered
(28 responses)- A4% (1)
- B96% (27)
Why each option
IP filtering controls network traffic by permitting or blocking packets based on their Layer 3 (Network layer) source or destination IP addresses.
Port filtering operates at Layer 4 (Transport layer) and makes decisions based on TCP or UDP port numbers, not Layer 3 IP addresses.
IP filtering operates at Layer 3 of the OSI model, inspecting the source and/or destination IP address fields in the IP packet header to make allow or deny decisions. Firewalls and ACLs commonly implement IP filtering to restrict which hosts or subnets can send traffic to a protected resource. This is one of the most fundamental traffic control mechanisms in network security.
MAC filtering operates at Layer 2 (Data Link layer) and controls access based on hardware MAC addresses, not Layer 3 IP addresses.
Application filtering operates at Layer 7 (Application layer) and inspects application-level content such as URLs or payload data, not Layer 3 source addresses.
Concept tested: IP filtering at OSI Layer 3
Source: https://learn.microsoft.com/en-us/windows/security/operating-system-security/network-security/windows-firewall/rules
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