DATA LINK LAYER WIRED NETWORKS
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The transmitting node sends an out-of-band signal to the receiver about the beginning of the frame.
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The receiving node identifies the beginning of a frame by seeing a logical address.
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The transmitting node sends a beacon to notify that a data frame is attached.
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The transmitting node inserts start and stop bits into the frame.
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Detailed explanation-1: -With bit stuffing, the boundary between two frames can be unambiguously recognized by the flag pattern. Thus, if the receiver loses track of where it is, all it has to do is scan the input for flag sequences, since they can only occur at frame boundaries and never within the data.
Detailed explanation-2: -Stop-and-wait ARQ is a technique used to retransmit the data in case of damaged or lost frames. This technique works on the principle that the sender will not transmit the next frame until it receives the acknowledgement of the last transmitted frame.
Detailed explanation-3: -The data-link layer is responsible for transferring messages (or frame) from a given node to all other nodes in the CAN network. This layer handles bit stuffing and checksums for error handling, and after sending a message, waits for acknowledgment from the receivers.