[单选题]下列哪个network命令会告知此路由器开始使用IP地址为10.1.1.1、10.1.100.1和10.1.120.1的接口上的OSPF()
                                                             正确答案 :B
                    
                      
                                                                                                                                         network 10.0.0.0 0.255.255.255 area 0 
                                                                                                                                                            
                    
                                     [单选题]能够分配给设备的IP,应该是()
                                                             正确答案 :A
                    
                      
                                                                                     网络有效IP 
                                                                                                                                                                                                                
                    
                                     [多选题]What are two characteristics of "store and forward" switching? (Select two answer choices)
                                                             正确答案 :BC
                    
                      
                                                                                                                                         The switch receives the complete frame. before beginning to forward it. 
                                                                                                                 Latency through the switch varies with frame. length. 
                                                                                                        
                    解析:解析:Explanation: 
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