The present invention relates to an apparatus and method for withdrawing and dewatering slag from a gasification system. A portable buffer is generated based on the selected data portion, the portable buffer comprising at least one device-independent data representation. The proposed method provides a considerably more computationally efficient implementation of HRTF filters with no detectable deterioration of output quality while saving memory when storing a large quantity of HRTFs due to the parameterization of its resonators and anti-resonators. This is usable on many different data types: including sound, video, graphics, calendars and word processors. Generated blocks are associated with the right-hand-side of respective 1-to-N transliteration rules to create a plurality of block rules. The method includes receiving, by a network device, a packet, having a broadcast address, but directed to a single network unit and forwarding the packet through a plurality of ports of the network device, but not through at least one port of the device through which the packet was not received.