Which of the following statements are true regarding bridges and switches?（） Switches are primarily software based while bridges are hardware based.。 Both bridges and switches forward Layer 2 broadcasts.。 Bridges are frequently faster than switches.。 Switches have a higher number of ports than most bridges.。 Bridges define broadcast domains while switches define collision domains.。 Both bridges and switches make forwarding decisions based on Layer 2 addresses.。
衡量资金时间价值大小有两个尺度，即（）和（）。
Which two are effects of connecting a network segment that is running 802.1D to a network segment that is running 802.1w？（） the entire network switches to 802.1D and generates BPDUs to determine root bridfe status.。 A migration delay of three seconds occurs when the port that is connected to the 802.1D bridge comes up。 The entire network reconverges and a unique root briddge for the 802.1D segment， and a root bridge for the 802.1W segment， is chosen。 the first hop 802.1w switch that is connected to the 802.1D runs entirely in 802.1DCompatibility mode and converts the BPDUs to either 802.1D or 802.1W segments of the network。 Classic 802.1D timers， Such as forward Delay and Max-age， will only be used as a backup， and will not be necessary if point-to-point links and edge prots are properly identified and set by the administrator.。
what does BGP neighbor in active state mean？
Which characteristics are representative of a link-state routing protocol?（） provides common view of entire topology。 exchanges routing tables with neighbors。 calculates shortest path。 utilizes event-triggered updates。 utilizes frequent periodic update。
班级管理问题是一种复杂的创造性劳动，单纯依靠班主任和任课教师的积极性是远远不够的，还必须注意充分调动和发挥学生参与管理的积极性。这就要求在班级管理中必须遵循（）原则。
