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Difficulty: HardNetworking Ports and Protocols

A systems administrator is configuring firewall rules for a newly deployed application server. The server must host encrypted web traffic for external clients and permit network administrators to establish secure, encrypted remote command-line sessions over the network. Which of the following port and transport protocol combinations must be allowed through the firewall to support these requirements? (Select TWO.)

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

Answer

TCP port 443 and TCP port 22
The requirement calls for hosting encrypted web traffic and enabling secure remote shell access. HTTPS provides encrypted web transport using TCP port 443, while SSH provides secure remote command-line management using TCP port 22.

Step-by-Step Solution

1
Identify the protocol and port required for secure, encrypted web traffic.
Encrypted web browsing uses HTTPS, which communicates over TCP port 443.
HTTPS secures web traffic by encrypting HTTP communications with TLS/SSL on standard TCP port 443.
2
Identify the protocol and port required for secure remote command-line administration.
Secure command-line management uses SSH, which operates on TCP port 22.
SSH establishes encrypted administrative terminal sessions over connection-oriented TCP port 22.
3
Evaluate transport layer protocols and security characteristics against the wrong options.
UDP port 22 is incorrect because SSH requires TCP reliable delivery. TCP port 80 is incorrect because standard HTTP transmits data in plaintext.
Matching both the correct transport layer protocol (TCP vs UDP) and the secure port variant fulfills the scenario constraints.

Key Concept

Networking Ports and Protocols
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Topics

Networking Ports and Protocols

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