Correct Answer: C
In Simple Queues, MikroTik uses the term "total" to refer to the sum of the incoming and outgoing traffic for a particular target. This includes both upload (TX) and download (RX) traffic.
MTCNA Course Material - Queues Overview:
"Total limit represents the combined limit of upload and download traffic. If both target-upload and target- download are defined, total-limit should be equal or higher." Rene Meneses MTCNA Study Guide - Queues Chapter:
"In Simple Queues, 'max-limit' and 'limit-at' can be set individually for upload and download, or together as
'total' which combines both directions."
Terry Combs Notes - Queue Definitions:
"Total in RouterOS queues means sum of upload and download. Always consider total bandwidth used in both directions when using 'total-limit'." Therefore, the correct and verified answer is C: upload + download.