TCP/IP Protocol Suite 4th Edition by Behrouz Forouzan

Exercise 10

An output interface in a switch is designed using the leaky bucket algorithm to send 8,000 bytes/s (tick). If the following frames are received in sequence, show the frames that are sent during each second.
a. Frames 1, 2, 3, 4: 4,000 bytes each
b. Frames 5, 6, 7: 3,200 bytes each
c. Frames 8, 9: 400 bytes each
d. Frames 10, 11, 12: 2,000 bytes each