单项选择题
A.The SSID broadcast is disabled.
B.Wireless router is improperly configured.
C.The user is connecting to the wrong SSID
D.The wireless NIC is defective.
单项选择题 A second network card in a server that activates if the primary card fails is an example of which of the following network performance optimization?（）
单项选择题 Which of the following cables would a technician make in order to identify a physical interfaceproblem?（）
单项选择题 A network technician is installing a small wireless network. A requirement is that individual users must authenticate using usernames and passwords. Which of the following technologies would support users authenticating with encrypted usernames and passwords?（）