You are the network administrator at Certkiller . The newly appointed Certkiller trainee wants to know which dial-peer subcommand correctly performs marking of VoIP packets. What will your response be?

A.
precedence 5

B.
ip precedence 5

C.
set ip mark precedence 5

D.
set ip precedence 5

E.
mark ip precedence 5

Explanation:

The syntax of B is correct.
IP precedence is encoded into the three high-order bits of the ToS field in the IP header. It supports eight classes of which two are reserved and should not be used value and is usally used for the best-effort class. The set ip precedence command marks packets of a class with the specified precedence value.
Reference: Introduction to IP QoS p. 9-104