单项选择题 AsuccessfulauthenticationattemptbyaRADIUSserverdoesnotsupplyausernametotheJUNOSsoftware.Whichusernameisusedbydefault？（）

单项选择题 A BGP router has the following configuration：  protocols{  bgp{  export[policy-1 policy-2 policy-3]；  }}  policy-options{  policy-statementpolicy-2 {  termget-statics{  fromprotocol static；  thenaccept；  }  termreject-all {  thenreject；  }  }  policy-statementpolicy-1 {  termget-aggregate {  fromprotocol aggregate；  thenaccept；  }  termreject-all {  thenreject；  }  }  policy-statementpolicy-3 {  termget-ospf {  fromprotocol ospf；  thenaccept；  }  termreject-all {  thenreject；  }  }  }   Which policy term is evaluated first when exporting routes？（）

单项选择题 Which action occurs when the BGP route 20.1.0.0/16 is evaluated by the policy expression？（） [editpolicy-options]  policy-statementreject_10 {  from{  route-filter20.1.0.0/16orlongerM  }  then{  communityadd 90-1；  accept  }}  policy-statementaccept_20 {  from{  route-filter20.1.0.0/16orlongerM  }  then{  communityadd 100-1；  reject；  }  }  community100-1 members 100：1；  community90-1 members 90：1  [editprotocols]  bgp{  groupebgp-group {  neighbor172.16.201.1 {  export（reject-10 && accept-20）；  }}}