실습> 네이버, 다음 SOA RR 분석하기 1. 네이버 SOA RR # dig naver.com soa ; DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.7 naver.com soa ;; global options: +cmd ;; Got answer: ;; ->>HEADERHEADER set type=soa > sbs.com Server: 192.168.108.3 Address: 192.168.108.3#53 sbs.com origin = ns.sbs.com mail addr = root.sbs.com serial = 2021111202 refresh = 86400 retry = 3600 expire = 604800 minimum = 500 > set type=ns > sbs.c..