Question: IF THE DATA LINK LAYER CAN DETECT ERRORS BETWEEN HOPS, WHY DO YOU THINK WE NEED ANOTHER CHECKING MECHANISM AT THE TRANSPORT LAYER

IF THE DATA LINK LAYER CAN DETECT ERRORS BETWEEN HOPS, WHY DO YOU THINK WE NEED ANOTHER CHECKING MECHANISM AT THE TRANSPORT LAYER
IF THE DATA LINK LAYER CAN DETECT ERRORS BETWEEN

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