SK0-004 · Question #30
An administrator is securing a secure web server by disabling ports. After completing this process, clients cannot access the secure web server. The administrator should now go back and verify…
The correct answer is C. 443. HTTPS traffic uses port 443, so disabling it on a secure web server will prevent all client browser access.
Question
An administrator is securing a secure web server by disabling ports. After completing this process, clients cannot access the secure web server. The administrator should now go back and verify whether which of the following ports is enabled?
Options
- A23
- B389
- C443
- D445
How the community answered
(33 responses)- A6% (2)
- C91% (30)
- D3% (1)
Why each option
HTTPS traffic uses port 443, so disabling it on a secure web server will prevent all client browser access.
Port 23 is Telnet, an unencrypted remote terminal protocol with no relation to secure web server access.
Port 389 is LDAP, used for directory services authentication queries, not web client connectivity.
Port 443 is the standard port for HTTPS (HTTP over TLS/SSL), which is the protocol used by all secure web servers. When this port is disabled, clients attempting to connect via https:// will be refused at the network layer, producing an immediate connectivity failure. Re-enabling port 443 restores the encrypted web traffic path.
Port 445 is SMB (Server Message Block), used for Windows file and printer sharing, not HTTPS web traffic.
Concept tested: Well-known port numbers - HTTPS port 443
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/service-overview-and-network-port-requirements
Topics
Community Discussion
No community discussion yet for this question.