centos7上网初级问题

Question

1: lo:<LOOPBACK，UP，LOWER_UP> mut 65536 qdisc noqueue state UNKNOWN group defauflt qlen 1000 link/loopback 00:00:00:00:00:00 br00:00:00:00:00:00:00
inet127.0..0.1/8scope host lo
valid_lft forever preferred_lft forever
intet6::1/128 scope host
valid_lft for evee peifered_lft forever
2: em1:<NO-CARRIER，BROADCAST，MULTI CAST，UP> mtu1500 qdisc mq state DOWN group de fault qlen1000
link/ether 18:66:da:93:90:cf (此网卡号)brd ff:重复6次
3: em1:<NO-CARRIER，BROADCAST，MULTI CAST，UP> mtu1500 qdisc mq state DOWN group de fault qlen1000
link/ether 18:66:da:93:90:d0 (此网卡号)brd ff:ff:重复6次
不写了

Answer 1

https://blog.csdn.net/heisejingyu/article/details/126370369?spm=1001.2014.3001.5502 看看这个