【单选题】Refer to the activity. You type the command ping www.cisco.com. What is the one of the first tasks that must occur before the first successful ping can occur?
A.
The domain name must be translated to an IP address.
B.
The PC sends a request for the default gateway on the Cisco network.
C.
The PC sends a DNSOFFER broadcast to find the closest DNS server.
【简答题】Correct the ralative clauses mistakes in each of these sentences. 1. Internet shopping is not easy in places who do not have a good delivery service 2. People from all walks of life generally like sho...