单项选择题
Which of the following network topologies offers the greatest protection against network outages due to a single line break？（）
A.Bus B.Star C.Mesh D.Ring
单项选择题 WhichofthefollowingtoolswouldbetheBESTtocheckconnectivityofaCAT5cable？（）
单项选择题 WhichofthefollowingInternetconnectiontypeshasthehighestamountoflatency？（）
单项选择题 WhichofthefollowingcabletypesistheLEASTaffectedbyEMI？（）
