SSCP Systems Security Certified PractitionerNetwork and Communications SecurityEasy
A network administrator is configuring a firewall to allow only secure web traffic (HTTPS) from the internal network to external web servers. Which of the following port numbers must be explicitly allowed in the outbound firewall rule?
- A23
- B80
- C443
- D21
Show answer & explanationAnswer & explanation
Correct answer: C. 443
HTTPS (Hypertext Transfer Protocol Secure) uses TCP port 443 by default for encrypted web communication. Therefore, this port must be allowed for secure web traffic.
Why the other options are wrong
- A. Port 23 is used for Telnet, which is an insecure protocol and not for web traffic.
- B. Port 80 is used for HTTP (Hypertext Transfer Protocol), which is unencrypted web traffic, not secure web traffic (HTTPS).
- D. Port 21 is used for FTP (File Transfer Protocol), not secure web traffic.
HTTPS Port
The default TCP port used for secure, encrypted web communication via the Hypertext Transfer Protocol Secure (HTTPS).
- Uses Transport Layer Security (TLS) or Secure Sockets Layer (SSL) for encryption.
- Ensures confidentiality and integrity of web traffic.
- Is the standard for secure browsing and online transactions.
Memory trick: Every Port Has Its Purpose: FTP, Telnet, HTTP, HTTPS.