单选题
发布日期:2020-04-11
router(config-if)#ip address 142.8.2.1 subnet mask 255.255.252.0
router(config-if)#142.8.2.1 0.0.3.255
router(config-if)#ip address 142.8.2.1 255.255.252.0
router(config-if)#142.8.2.1 subnet mask 255.255.252.0
router(config-if)#ip address 142.8.2.1 0.0.3.255
router(config-if)#ip address 142.8.2.1 subnet mask /22
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