单项选择题
A. Replace the wireless bridges with wireless access points.
B. Install bi-directional amplifiers at both sites.
C. Configure channel hopping on both wireless bridges.
D. Replace the omni-directional antennas with Yagi antennas
单项选择题 A user is unable to reach the Internet. The technician asks the user to do an IPCONFIG /all. The userreports that their IP address is 172.16.1.18, subnet mask is 255.255.255.0, and their default gateway is 172.16.1.18. Which of the following is the cause of the problem?（）
单项选择题 Which of the following are considered link state protocols?（）
单项选择题 According to the OSI model, which of the following layers is responsible for providing reliablecommunication?（）