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为什么 `ip addr` 显示 inet 192.168.122.1/24？

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为什么 `ip addr` 显示 inet 192.168.122.1/24？

我的本地 IP 地址是：10.102.42.102，但我不明白该地址的其余部分。有人可以解释为什么吗？

root@HitHiFitHai:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host 
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 78:24:af:36:06:cb brd ff:ff:ff:ff:ff:ff
inet 10.102.42.102/8 brd 10.255.255.255 scope global eth1
   valid_lft forever preferred_lft forever
inet6 fe80::7a24:afff:fe36:6cb/64 scope link 
   valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
link/ether 56:9c:21:33:37:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
   valid_lft forever preferred_lft forever
4: macvtap0@eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 500
link/ether 52:54:00:d3:46:e2 brd ff:ff:ff:ff:ff:ff
inet6 fe80::5054:ff:fed3:46e2/64 scope link 
   valid_lft forever preferred_lft forever
 root@HitHiFitHai:~#

答案1

: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
link/ether 56:9c:21:33:37:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
   valid_lft forever preferred_lft forever

这是 libvirt 创建的“默认”桥接网络，用于为虚拟机提供网络（nat 如果提醒好的话） 192.168.122/1 是一个 C 类网络，具有 255.255.255.0 网络掩码（24 位）

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