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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

A company migrates its public website to an Amazon EC2 instance that runs Apache HTTP Server in a private subnet. An internet-facing Application Load Balancer (ALB) in a public subnet forwards web requests to this instance. The instance's security group currently blocks all inbound traffic. To re-establish user access while adhering to the principle of least privilege, which inbound rule should be added to the instance's security group?

  • Allow inbound TCP traffic on port 80 from the ALB's security group.

  • Allow inbound UDP traffic on port 80 from the ALB's private IP address range.

  • Allow inbound TCP traffic on port 443 from 0.0.0.0/0.

  • Allow inbound ICMP echo requests (type 8) from 0.0.0.0/0.

ISC2 Systems Security Certified Practitioner (SSCP)
Network and Communication Security
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