题型:单选题 标签:keepalive数据包
题目:
36、 Which of the following protocols are used for the periodic keepalives sent between IKE peers during periods of inactivity? IKE对等设备在非活动时间内使用下面的哪一个协议向对方发送周期性的keepalive数据包?
A. IPsec
B. ICMP
C. DPD
D. UDP