def validate_cipher_suite_id(cipher_suite_id):
    """Validates that a CipherSuite conforms to the proper format.

    Args:
        cipher_suite_id (int): CipherSuite id.

    Returns:
        (int): The original CipherSuite id.

    """
    if not isinstance(cipher_suite_id, int):
        raise TypeError('CipherSuite ID must be of type int.')
    if not 0 <= cipher_suite_id <= 3:
        raise ValueError('Invalid CipherSuite.')
    return cipher_suite_id
