Which of the following protocols enables a group of routers to form a single virtual router， and then use the real IP address of a router as the gateway address， as defined in RFC 2338？（）
- A、 Proxy ARP
- B、 HSRP
- C、 IRDP
- D、 VRRP
- E、 GLBP
正确答案:D
答案解析:有
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