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Difficulty: EasyCommon Ports and Protocols

A network technician needs to configure firewall rules to permit traffic for secure web browsing and secure remote command-line administration. Which TWO of the following protocol and default port combinations should be allowed?

  1. SSH operating over TCP port 22Answer
  2. HTTPS operating over TCP port 443Answer
  3. C
    Telnet operating over UDP port 23
  4. D
    HTTP operating over TCP port 443

Answer

The correct selections are SSH operating over TCP port 22 and HTTPS operating over TCP port 443.
SSH (TCP port 22) and HTTPS (TCP port 443) are standard secure protocols designed to encrypt command-line management and web traffic, respectively.

Step-by-Step Solution

1
Identify the protocol and port required for secure command-line administration.
SSH uses TCP port 22 to provide encrypted remote management.
SSH is the standard encrypted alternative to unencrypted Telnet.
2
Identify the protocol and port required for secure web traffic.
HTTPS uses TCP port 443 to secure web communications via TLS/SSL encryption.
HTTPS operates over TCP port 443, whereas unencrypted HTTP operates over TCP port 80.

Key Concept

Standard default port and transport protocol assignments for secure network services.
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Common Ports and Protocols

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