QuestionQ379

Application Deployment and Security

An engineer needs to investigate issues in a web application and route them to the appropriate teams. The engineer checks application reachability through a single public IP address and port and finds that HTTPS access works for three servers in a network farm with IP addresses 172.16.50.1, 172.16.50.2, and 172.16.50.4, but HTTPS access to the server at IP 172.16.50.3 fails. Which problem type must be addressed as the cause in this case?

  • A VPN connectivity
  • B NAT
  • C blocked transport port
  • D proxy
Explanation

Because HTTPS access through the same public address succeeds for the other network-farm servers, the shared VPN, NAT, and proxy path is operational. The isolated server failure indicates that the HTTPS transport port is blocked for 172.16.50.3.

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