单项选择题
A. 10.10.0.0/18 subnetted with mask 255.255.255.252
B. 10.10.0.0/25 subnetted with mask 255.255.255.252
C. 10.10.0.0/24 subnetted with mask 255.255.255.252
D. 10.10.0.0/23 subnetted with mask 255.255.255.252
E. 10.10.0.0/16 subnetted with mask 255.255.255.252
单项选择题 Which component of VPN technology ensures that data can be read only by its intended recipient?（）
单项选择题 An administrator attempts a traceroute but receives a "Destination Unreadable" message. Which protocol is responsible for that message?（）
单项选择题 When a host transmits data across a network to another host, which process does the data go through?（）