答案及解析：[单选题]What type of packet is sent by a peer across a failover link to detect the operational state of a pe - 计算机认证题库- 答案窝(daanwo.com)-大学生作业答案及考资分享平台

问题：

[单选题]What type of packet is sent by a peer across a failover link to detect the operational state of a peer device?通过故障切换的链路向对端设备发送哪种类型的数据包，可以检测到另外一端的设备的操作状态?
A. DPD
B. Hello
C. ACK
D. GoodBye