In order to avoid the disappearance of frames during transmission, what method does the data link layer adopt?
What is the probability that binary bits are transmitted incorrectly in the data transmission system called?
Which is wrong among the following descriptions of bit error rate?
Which will only retransmit the wrong data frame among the following error control methods?
Which control method is primarily used by the sliding window protocol?
In CRC code calculation, a binary bit string can be associated with a unary polynomial containing only 0 or 1 coefficients. For example, the polynomial corresponding to bit string 101101 is（）?
If the frame sequence number of the data link occupies 4 bits, the maximum sender window should be?
In CRC cyclic redundancy calculation, a binary bit string can be corresponded to a unary polynomial with only two coefficients of 0 or 1. For example, the string of binary numbers corresponding to the polynomial x^5+x^4+x+1 should be?
The error detection and correction capability of a code depend on Hamming distance. In order to correct d-bit errors, what is the code with Hamming distance?
What is the check code that can detect all odd errors, single bit errors, double bit errors and all burst errors which are less than or equal to the length of the check bit?
Flow control is one of the basic functions of the data link layer. Regarding flow control, which one is correct among following statements?
Which of the three services provided by the data link layer to the network layer has the lowest quality of service and can be used to transmit information with high real-time requirements in occasions with low line bit error rate?
Which does not belong to the data link layer among following functions?
The zero-bit insert/delete method states that if the sender is in a sequence of bits between two F flags. How many successive ones are detected, if it increments the number by one, regardless of whether the bit after it is 0 or 1.
Assume that the data link layer adopts go-back-N mode for error control, and the sender has already sent the frames numbered from 0 to 7. When the timer times out and the confirmation of frame 1 does not return, what is the number of frames that the sender needs to retransmit?