Stochastic is random, such as the addition of noise to a voltage level.
Deterministic is due to the interference of the pulses (they're usually called symbols) with each other due to the fact that the bandwidth of the interconnect is not infinite and as a result the edges get "smeared". Because the edges are at variable times relative to one another the amount of interference varies from each bit of data to the next. This causes the point in time at which the data is detected to also shift from bit to bit causing jitter relative to the average. These two effects combined (plus other second order effects) are responsible for deterioration in the sound if they are not corrected. If the shift is too large the transition will not be correctly detected at all and the bit is either lost or misplaced and a data error occurs and is flagged by the CRC.
Deterministic is due to the interference of the pulses (they're usually called symbols) with each other due to the fact that the bandwidth of the interconnect is not infinite and as a result the edges get "smeared". Because the edges are at variable times relative to one another the amount of interference varies from each bit of data to the next. This causes the point in time at which the data is detected to also shift from bit to bit causing jitter relative to the average. These two effects combined (plus other second order effects) are responsible for deterioration in the sound if they are not corrected. If the shift is too large the transition will not be correctly detected at all and the bit is either lost or misplaced and a data error occurs and is flagged by the CRC.