What describes Egress Filtering?

• A. Method of filtering outbound network traffic such that only explicitly allowed traffic is permitted to leave the network.
• B. Method of filtering inbound network traffic only
• C. A technique to monitor file integrity
• D. A standard for government encryption

Answer: (A)

Egress filtering is the practice of controlling outbound network traffic from the environment. It enforces an allowlist so only explicitly permitted destinations, protocols, and services can leave the network, helping prevent data exfiltration and leakage of sensitive information. It's not about inbound traffic (that would be ingress filtering), it's not about monitoring file integrity (that would be file integrity monitoring), and it's not a standard for government encryption (encryption standards govern protection methods, not outbound access rules).