单选题A company wants all IM chat via the internet to stop. A technician blocks IRC traffic with a traffic shaping device， yet IM chat remains useable. Which of the following should a technician do next？（）A Block both IRC and ICMPB Utilize SNMP to identify I
题目
单选题
A company wants all IM chat via the internet to stop. A technician blocks IRC traffic with a traffic shaping device， yet IM chat remains useable. Which of the following should a technician do next？（）
A
Block both IRC and ICMP
B
Utilize SNMP to identify IM users
C
Contact the IM carrier to request the IM account be disabled
D
Change the shaping setting to allow minimal traffic to reduce port hopping