Refer to the exhibit. A developer can access the TLS REST API on server A, but cannot access the API on server B. The developer can ping server B. When the developer performs a packet capture on the T

Port 80 is for HTTP, not TLS, and blocking it on the outgoing interface of firewall B would affect server B's ability to initiate connections, not receive them.

If port 443 were blocked on the outgoing interface of firewall A, the developer would not be able to access the TLS REST API on *any* server, including server A, contradicting the statement that server A can be accessed.

If a developer can ping server B but cannot access its TLS REST API, it strongly indicates that a firewall is blocking TCP port 443 (the standard port for TLS/HTTPS) on the incoming path to server B. Although a packet capture on server B might show an initial response, a firewall can still block the complete connection establishment, causing the client-side access to fail.

Port 80 is for HTTP, not TLS, and blocking incoming traffic on firewall A (the client's side) would not prevent the client from initiating an outgoing connection to server B.