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单项选择题 You need to configure two Company routers for high availability.  Which protocol enables a group  of routers to form a single virtual router and use the real IP address of a router as the gateway  address? ()

A、 HSRP

B、 IRDP

C、 Proxy ARP

D、 GLBP

E、 VRRP

F、 None of the other alternatives apply

  • E
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