An Amazon EC2 security group cannot filter based on which of the following? [1 Mark]

Question

BlackTom AI · Accepted Answer

To analyze this question, we must recall what an AWS EC2 security group can filter on and what it cannot filter on.
Option a. Instance health: Security groups operate at the network and transport layers and inspect packet-level attributes like IPs, ports, and protocols. They do not consider or filter based on the health status of an instance. So this is not something a security group can filter on.
Option b. Source IP address: Security groups explicitly allow filtering by the source IP address, applying rules to inbound and outbound traffic from specific IPs or ranges. This option is a valid filtering criterion.
Option c. Destination port: Security groups can filter traffic by destination port, enabling rules that permit or deny traffic to particular ports (e.g., 80, 443). This is a standard capability of security groups.
Option d. Transport layer protocol: Security groups can filter based on the transport layer protocol (such as TCP or UDP); rules include protocol specifications. This is also a supported filtering criterion.
Thus, among the listed options, instance health is not something a security group can filter on, whereas the other options describe legitimate filtering criteria handled by security groups.

An Amazon EC2 security group cannot filter based on which of the following? [1 Mark]单项选择题

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