单项选择题
A. The PC has connectivity with a local host.
B. The PC has connectivity with a Layer 3 device.
C. The PC has a default gateway correctly configured
D. The PC has connectivity up to Layer 5 of the OSI model
E. The PC has the TCP/IP protocol stack correctly installed.
单项选择题 How does using the service password encryption command on a router provide additional security? （）
单项选择题 What is the maximum data rate specified for IEEE 802.11b WLANs?（）
单项选择题 Which protocol should be used to establish a secure terminal connection to a remote network device? Select the best response.（）