}

    /**
     * Validates a port number
     *
     * @param port the port number to validate
     * @throws IllegalArgumentException if port is invalid
     */
    public static void validatePort(int port) {
        if (port < 1 || port > 65535) {
            throw new IllegalArgumentException("Invalid port number: " + port);
        }
    }

    /**
     * Validates timeout value
     *

        assertDoesNotThrow(() -> InputValidator.validatePort(445));
        assertDoesNotThrow(() -> InputValidator.validatePort(139));
        assertDoesNotThrow(() -> InputValidator.validatePort(1));
        assertDoesNotThrow(() -> InputValidator.validatePort(65535));

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validatePort(0));

    int lastIndex = parts.size() - 1;

    // Validate the last part specially, as it has different syntax rules.

    if (!validatePart(parts.get(lastIndex), true)) {
      return false;
    }

    for (int i = 0; i < lastIndex; i++) {
      String part = parts.get(i);
      if (!validatePart(part, false)) {
        return false;
      }
    }

    return true;
  }