How Cisco Fame relay works.
The main idea behind which data transmission techniques lie is adapted for the LAN transmission but in the much broader sense to make it possible to implement in the Wide area networks. Cisco Frame relay places all the available data in the packets of different sizes called as frames and provide control for the error handling to the end points available. In this way the entire transmission gets faster. In many places and organization PVC technique which means private virtual circuits sued to make sure the customer that they have been provided with the fully dedicated pat for the transmission of data. It is the duty of the provide service o look out for the every available route for sending the data frame to the required location. Each service charge according to the number of paths provided. Frame relay can execute both T carrier and T 1 lines. The medium level range which it provides for the consistent data transmissions in 128 kb very second. In most of the network designs the virtual circuits create as connection for approaching the local or wide area network, where frame relay lay between the network type an the broad device which may switch or router. The typical traffic of the Frame relay can be identified by the LAP D. there are also several units that are associated. It has the data unit for a protocol shortly known as PDU and which contain following fields.
Field of Flag. This field is typically designed to mange and execute the data link synchronization which points the start and end point of the every single frame in the fixed sequence 011111110 the end and start bits represents that pattern doesn’t exist inside the data frame just tells the start and end. Different kind of bit stuffing method scan be used here
Address field. This portion of the data unit contains the destination address where frame has to reach. It’s a two octet address but can be extend to 3 to 4 octets. It contains the extension of bits, response bits and data link identifiers bits. They are also known as the DLIB.
Information field. This is a system parameter that tells the number of the data bytes a single host can put into one frame or it can be said that it specifies the length of the packet. The standardize size of t frame that is commonly used in 262 octets. In the case of large communication for protocol to protocol this length can be extended to the 1600 octets.
It is decided according got the need and demand of the customer.
FCS Field. FCS field stands for the frame check sequence. This field is dedicated for the cyclic redundancy check which refers to the duplication of the data packets and other errors in the frame. Frame relay use simplified techniques for the switching of nodes over the network.