Customer X has a hub-and-spoke Frame Relay network， with a central office and two branch offices （RemoteA and RemoteB）. Each location has only one physical link to the Frame Relay cloud and RemoteB has a router that is not a Cisco router. Since the installation， there is no connectivity between RemoteB and the central office. What is a possible solution to this issue？（） ["Because Frame Relay IETF encapsulation is only configurable at interface level， you must use IETF encapsulation on all routers.","This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.","The router at RemoteB must be replaced by a Cisco router.","Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.","There is a problem in the Frame Relay cloud， because Cisco routers are compatible with IETF Frame Relay."]
弧菌
Refer to the exhibit. Which switching feature is being tested?（） ["loop guard","PortFast","root guard","BDPU guard"]
车站和列车内的治安秩序，由（）负责维护 ["当地公安机关","铁路公安机关","铁路和地方公安机关共同","铁路公安机关和铁路有关单位共同"]
齿轮式差速器有圆锥齿轮式和（）式两种。 ["条形齿轮","斜齿轮","直齿轮","圆柱齿轮"]
人体运动的内力
