单项选择题
Which configuration command removes all log filters currently configured on the ERX Edge Router？（）
A. no log here B. no log fields C. no log filters D. no log severity
单项选择题 LogmessagesareappearingveryquicklyontheconsoleofyourERXEdgeRouter.WhichPrivilegedExeccommanddisablesreal-timeconsolelogging？（）
单项选择题 WhichcommanddisplaystheresultsofaloopbacktestyouexecutedonaCT3linemoduleinslot5，port0，t1number4？（）
单项选择题 WhatisthepurposeoftheOSPFhellopacket？（）
