If that frame occurs in the data then it can be interpreted in the wrong way. Byte Stuffing used in Point-to-Point Protocolįlag Pattern is used to specify the end or start of the frame. It is of 2 or 4 bytes, used for error detection and correction. It contains the data that is sent by an upper layer protocol over PPP Link.
It tells the Receiver about the upper layer Protocol to which the encapsulated data belongs. Thus saving two bytes of overhead in the frame.
PPP allows the sender not to send the Address and Control Bytes. This bytes set to a constant value of 0 0 0 0 0 0 1 1. In other words, address and control bytes are optional. PPP allows the sender to simply not send the address and control bytes. The address will always contain 1 1 1 1 1 1 1 1 as in case of point to point link there is no need to specify source and destination in the frame. The flag is necessary as it separates data and header. The flag bytes indicate the start and finish of the PPP frame. Network Control Protocol- These Protocols are used to negotiating the parameters and facilities of the networks.Link Control Protocol- It is responsible for establishing, configuring and testing the links for transmission.Encapsulation- It is used to transmit datagram over the specified Physical Layer.
#Which address is used in the address field of a ppp frame serial#
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