单项选择题
A. Type ping 172.16.45.9:::::.
B. Type ping ::9.45.16.172.
C. Type ping followed by the Link-local address of the server.
D. Type ping followed by the Site-local address of the server.
单项选择题 Your company has computers in multiple locations that use IPv4 and IPv6. Each location is protected by a firewall that performs symmetric NAT. You need to allow peer-to-peer communication between all locations. What should you do？（）
单项选择题 Your company uses DHCP to lease IPv4 addresses to computers at the main office. A WAN link connects the main office to a branch office. All computers in the branch office are configured with static IP addresses. The branch office does not use DHCP and uses a different subnet.You need to ensure that the portable computers can connect to network resources at the main office and the branch office. How should you configure each portable computer？（）
单项选择题 Your company is designing its network. The network will use an IPv6 prefix of 2001:DB8:BBCC:0000::/53.You need to identify an IPv6 addressing scheme that will support 2000 subnets. Which network mask should you use？（）