Frame Relay

Frame Relay
Frame Relay for the use of fast-packet (Fast Packet) switching technology, is a data transmission network agreement, Frame Relay service provides hearing between the amount of local area network (LAN) and wide area network (WAN) between. In this way similar to X.25, but it is 4K or 8K of the frame (frame) as a data transmission unit can support PVC (Permanent Virtual Circuit) or SVC (Switched Virtual Circuit), data is transmitted before being disassembled into packets one by one, in the transmission process, the paths of these packets may not necessarily be the same, so those at the receiving end must be to rearrange the order of received packets.
Frame Relay typically is 64 Kbps (DS0) to 1.544 Mbps (T1) the rate of transmission, and Frame Relay switching equipment does not do any error correction or flow control, so it requires very stable transmission equipment to today's transmission technology , using ATM to transfer Frame Relay is a good choice. Frame Relay is usually to transmit data will be a little delay time, and this time is usually less than 300 ms.
The application of frame relay can be used as high-speed data exchange network, with high quality and low error rate of the fiber optic trunk circuits, transmission rate of 45Mbps, constitute the backbone network provides fast wide-area transmission of frame relay service. Since frame relay telecommunications agreement, with high transmission throughput (Throughput), high efficiency, high-speed rate and low latency of the important features, especially suited to set delivery type (Bursty) News Service's data communications, such as local area network (LAN) between the interconnect, frame relay with sealing device (FRAD) of the Jie access, and mainframe computers or workstations (Workstation) and other data communications equipment to connect.


FreeBSD OS
INTEL processor in a (MICROPROCESSOR) on the implementation of the UNIX operating system, and the like LINUX for free.


FSB (Front side bus)
Between the processor and Northbridge chip channel, is responsible for the processor and data transfer between the Northbridge chip and its data transmission frequency of a general processor, also known as the "FSB." VIA P4X333 motherboard design to sketch an example: the diagram at the top of the blue background of some of the North Bridge chip to the top of the orange boxes represent the Pentium 4 processor, the channel shall be between the two front-side bus.
Pentium 4 prior to the past (not including Pentium 4), is usually connected Northbridge FSB frequency and memory frequency of the same memory bus, it will be generally referred to as the FSB frequency of the two. For example, the Pentium III with 100MHz or 133MHz FSB; while the Celeron, compared with 100MHz or 66MHz. However, since the Pentium 4 with DDR memory began, FSB and memory bus speed is not necessarily different from his. For example, VIA P4X333, for example, the front-side bus frequency is 533MHz, but its memory bus frequency up to 333MHz (also supports 200 and 266).
At present (June 2002) commercially available processors, the frequency of the most front-side bus Pentium 4's 533MHz. Second, is the previous version of the Pentium 4's 400MHz. The AMD Athlon XP by the North Bridge chip with its FSB is 100 or 133MHz


FSF Free Software Foundation
One committed to eliminating copy (COPYING) and distribution (REDISTRIBUTION) restrictions, to help people understand and modify the software organization whose purpose is to develop and promote free software in various fields, the most important job is to help develop GUN operating system (OS). Although the is free software, but not limited for sale and modification FSF software, no one shall be the product made from FSF limitations, FSF is the main source of funding by the FSF released the product provided by the manufacturer.