A system administrator is troubleshooting a database connection failure from a newly deployed application host (`10.150.12.45/24`) to an enterprise database server (`172.28.100.50`). The application requires TCP port 5432 (PostgreSQL). The administrator executes diagnostic commands on the host and the intermediary router:
Host CLI Output (`ip route` & `ip addr`):
text eth0: inet 10.150.12.45/24 brd 10.150.12.255 scope global eth0 default via 10.150.13.1 dev eth0
Router ACL Output (`show ip access-lists OUTBOUND_DB`):
text Extended IP access list OUTBOUND_DB 10 permit tcp 10.150.12.0 0.0.0.255 host 172.28.100.50 eq 3306 20 deny ip any any
Based on the diagnostic output, which TWO factors are directly preventing the application host from communicating with the database server?
- The default gateway IP address configured on the host resides in a different IPv4 subnet than the host's primary interface.Cevap
- The active router Access Control List only permits MySQL traffic (TCP 3306) and relies on an explicit deny rule that blocks PostgreSQL traffic (TCP 5432).Cevap
- CThe host cannot reach external IP addresses because its primary interface requires a public IPv4 broadcast address instead of .
- DPostgreSQL database traffic operates exclusively over UDP port 5432, causing a protocol mismatch when attempting TCP connections.