The visualization of this scenario begins with a rectangle labeled "Datagram." A blue arrow points vertically downward to a second rectangle labeled "D," with a smaller rectangle appended to its right side, labeled "EDC." A note explains that the datagram at this point, minus the EDC, is comprised of "d data bits." A square labeled HI is positioned just below and to the left of the initial datagram, and a blue arrow points vertically downward from it as well and into the rectangle labeled D.

The blue arrow turns and extends rightward, through a tunnel labeled "Bit error-prone link," then turns again and extends vertically upwards. The datagram is now labeled D' and EDC'. The arrow points to a diamond shape, labeled "all bits in D' OK?" A blue arrow labeled "N" extends rightward from the right-most point of the diamond, and a note explains: "Detected error." A second blue arrow, labeled "Y," points upwards from the top point of the diamond into a second rectangle labeled "Datagram."