Which configuration would make an IP SLA probe use a precedence value of 3?
A. ip sla 1
icmp-echo 1.1.1.1
tos 12
B. ip sla 1
icmp-echo 1.1.1.1
tos 96
C. ip sla 1
icmp-echo 1.1.1.1
precedence 3
46 / 235
D. ip sla 1
icmp-echo 1.1.1.1
dscp 12
这个是如何换算的,请指点。