LPIC Level 1 対策: 第13章 - ネットワーク管理

ネットワークアドレス

ネットワークコマンド

$ host www.google.com
www.google.com has address 216.58.220.100
www.google.com has IPv6 address 2404:6800:4004:812::2004
$ host 203.174.70.208
208.70.174.203.in-addr.arpa domain name pointer 203-174-70-208.data-hotel.net.

$ dig www.yahoo.co.jp

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.4 <<>> www.yahoo.co.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 863
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.yahoo.co.jp.		IN	A

;; ANSWER SECTION:
www.yahoo.co.jp.	95	IN	CNAME	edge12.g.yimg.jp.
edge12.g.yimg.jp.	38	IN	A	182.22.28.252

;; AUTHORITY SECTION:
g.yimg.jp.		398	IN	NS	gns02.yahoo.co.jp.
g.yimg.jp.		398	IN	NS	gns12.yahoo.co.jp.

;; Query time: 33 msec
;; SERVER: 192.168.3.1#53(192.168.3.1)
;; WHEN: 金  4月 23 16:21:46 JST 2021
;; MSG SIZE  rcvd: 128

$ getent hosts www.linuxacademy.ne.jp
203.174.70.208  www.linuxacademy.ne.jp