单项选择题 A company plans to implement a wired network between several computers. The company wants this network to be able to have a transmission rate of 1Gbps. Which of the following cable types should be purchased?（）

单项选择题 Which of the following protocols uses port 119, by default?（）

单项选择题 When the DHCP server is unavailable for a network, how will PCs attempt to configure their NICs?（）