[单选] As a network administrator, you have been instructed to prevent all traffic originating on the LAN from entering the R2 router. Which the following command would implement the access list on the interface of the R2 router?（）

《空调列车服务质量规范》始发开车前电茶炉水开，清空热水瓶存水。 包含本数的有以上、以下、以前、以后、超过、不足。（） 下列（）情况属于机动车维修的失信行为。 不执行质量保证期制度。 不按规定明码标价。 乱收费。 使用维修后的配件。 单立杆双排钢管扣件脚手架的搭设高度一般不得超过（）。 30m。 40m。 50m。 60m。 侧倾试验台主要用于测量什么？ As a network administrator, you have been instructed to prevent all traffic originating on the LAN from entering the R2 router. Which the following command would implement the access list on the interface of the R2 router?（）