Positive SSL
1 136. 要通知傳送端網路有壅塞(Congested)情形時,可傳送ICMP(Internet Control Message Protocol)之何訊息?
A 參數問題(Parameter Problem)
B 來源抑制(Source Quench)
C 回訊請求(Echo Request)
D 逾時(Time Exceeded)