A company wants to create highly available datacenters.
Which of the following will allow the company to continue to maintain an Internet presence at all sites in the event that a WAN circuit at one site goes down? the Open Shortest Path First (OSPF) protocol, to exchange routing information among themselves. At the edges of an AS are routers that communicate with the other AS’s on the Internet, using an exterior gateway protocol such as the Border Gateway Protocol (BGP).

A.
Load balancer

B.
VRRP

C.
OSPF

D.
BGP