Question

the advantage of assigning a sequence number to every byte of data instead of every datagram is that this
○ enables the receiver to acknowledge partial datagrams
○ enables better detection of bit-level errors
○ simplifies the counting of segments
○ none of the above

Explanation:

When sequence numbers are assigned to each byte rather than each datagram, the receiver can track exactly which bytes have been received. This allows the receiver to acknowledge specific ranges of bytes, meaning if only part of a datagram is successfully received (e.g., in cases of fragmentation or partial delivery), it can acknowledge the valid bytes instead of having to re-request the entire datagram. Bit-level error detection is handled by checksums, not sequence numbering. Counting segments is not simplified by byte-level sequence numbers, as it adds more granular tracking rather than simplification.

Answer:

Enables the receiver to acknowledge partial datagrams