A Buffer is a Chunk of Contiguous Memory.
A Queue usually has a buffer within it, which it uses to retain data written until it is read and removed.
A Queue Buffer Length is calculated from the waiting list of Data Packet in a RPL Node.
Open queuebuf.c file at below path:
>> contiki-ng/os/net/queuebuf.c
Here, the function handled by Queue buffer length of RPL node.
1.Network Window
2.MoteOutput Window