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• [CIT]'show interface serial' 결과 해석 및 장애 처리_네트워크관리자_네트워크엔지니어_네트워크취업_ccna학원_ccna자격증ccna학원 RouterA#show int serial 0 Serial0 is up, line protocol is down Hardware is HD64570 Internet address is show interface" counters never Input queue: 0/75/0 (size/max/drops); Total output drops: 0 Queueing strategy blog.naver.com · 2014.01.22