HTB Settings - Hierarchical Token Bucket, it is a faster replacement for the CBQ 
qdisc in Linux. HTB helps in controlling the use of the outbound bandwidth on a 
given link. HTB allows you to use one physical link to simulate several slower links 
and to send different kinds of traffic on different simulated links. In both cases, 
users must specify how to divide the physical link into simulated links and how to 
decide which simulated link to use for a given packet to be sent. In other words, 
HTB is useful for limiting a client's download/upload rates, thereby preventing his 
monopolization of the available bandwidth. 
 
 
QOS Classify 
 Netmask Priority