单项选择题
A. Number of routes available.
B. Number of router hops.
C. Time that an advertised route is valid.
D. Time to make a round trip.
单项选择题 An administrator has found interference on a network. Which of the following cable types is thenetwork MOST likely composed of?（）
单项选择题 Which of the following cable types has a MAXIMUM transmission speed of 10Mbps?（）
单项选择题 Which of the following layers is associated with the physical hardware address of a network node?（）