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Which Cisco-proprietary First-hop Redundancy Protocol uses Round-Robin as its default load balancing mechanism?
VRRP
GLBP
RSTP
HSRP
GLBP or Gateway Load Balancing Protocol uses Round-Robin (alternate ARP replies from AVGs to hosts) as its default load balancing mechanism. Other load balancing options are Host-Dependent (the same AVF is maintained for each host) and Weighted (used when unequal load balancing is needed). HSRP doesnt provide load-balancing, at least by default. VRRP is an open standard while RSTP is a Layer 2 redundancy protocol. (http://www.cisco.com/en/US/docs/ios/122t/122t15/feature/guide/ft_glbp.html#wp1027184)
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