A technician is asked to filter inbound and outbound traffic of a specific service on the network. Which of the following would BEST allow the technician to comply with the request?

The correct answer is C. Port filtering. Network services are identified by port numbers (e.g., HTTP on port 80, HTTPS on 443, FTP on 21). Port filtering-typically implemented via firewall ACLs-allows a technician to permit or deny traffic based on TCP/UDP port numbers, making it the most direct way to control traffic…

Network security

Question

Options

AMAC filtering
BIP filtering
CPort filtering
DContent filtering

How the community answered

(50 responses)

A
2% (1)
B
6% (3)
C
88% (44)
D
4% (2)

Explanation

Network services are identified by port numbers (e.g., HTTP on port 80, HTTPS on 443, FTP on 21). Port filtering-typically implemented via firewall ACLs-allows a technician to permit or deny traffic based on TCP/UDP port numbers, making it the most direct way to control traffic for a specific service. MAC filtering restricts access based on hardware addresses and cannot target a specific service. IP filtering restricts traffic based on source/destination IP addresses, not services. Content filtering inspects the payload of packets (URLs, keywords) and is used for content policy enforcement, not service-level traffic control.

Topics

#port filtering#traffic filtering#ACL#firewall

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