@staticmethod
def calc_network(address, mask):
    """
        Calculate the network address from the set IP address and subnet mask.
        :param address: IP address
        :param mask: subnet mask
        :return: network address
        """
    addr_splitter = address.split('.')
    mask_splitter = mask.split('.')
    network_arr = []
    for i in range(0, len(addr_splitter)):
        network_arr.append(str(int(addr_splitter[i]) & int(mask_splitter[i])))
    return '.'.join(network_arr)
