单选题What protocol specified by RFC 1256 will allow an enabled IP host a new router when a router becomes unavailable？ （）A IRDPB SNMPC HSRPD VRRP
单选题
What protocol specified by RFC 1256 will allow an enabled IP host a new router when a router becomes unavailable？ （）
A
IRDP
B
SNMP
C
HSRP
D
VRRP
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解析：
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