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Difficulty: EasyCommon Ports and Protocols

A system administrator needs to configure firewall access for a new web server that will support secure command-line administration and encrypted web traffic. Which of the following transport protocols and default port numbers must be permitted through the firewall? (Select TWO.)

  1. TCP port 22Answer
  2. TCP port 443Answer
  3. C
    UDP port 22
  4. D
    TCP port 80

Answer

TCP port 22 and TCP port 443
SSH uses TCP port 22 to enable encrypted administrative terminal sessions, and HTTPS uses TCP port 443 to secure web communications with TLS/SSL encryption.

Step-by-Step Solution

1
Determine the protocol and transport port required for secure command-line management.
SSH uses TCP port 22.
SSH provides encrypted shell access and requires TCP for reliable, connection-oriented data delivery.
2
Determine the protocol and transport port required for encrypted web traffic.
HTTPS uses TCP port 443.
HTTPS encrypts HTTP communication using TLS over connection-oriented TCP port 443.

Key Concept

Default transport protocol and port mappings for secure administration (SSH on TCP port 22) and secure web communications (HTTPS on TCP port 443).
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Common Ports and Protocols

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