Which of the following technologies provides a failover mechanism for the default gateway?
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A. B. C. D.A.
The technology that provides a failover mechanism for the default gateway is A. FHRP (First Hop Redundancy Protocol).
FHRP is a set of protocols that provide redundancy for the first hop of IP traffic. The first hop is the router that a device on a network uses to send traffic outside of its own network. When there are multiple routers configured as first hops, FHRP allows for automatic failover from one router to another in the event of a failure.
There are several FHRP protocols, including HSRP (Hot Standby Router Protocol), VRRP (Virtual Router Redundancy Protocol), and GLBP (Gateway Load Balancing Protocol). These protocols allow multiple routers to share a virtual IP address, which serves as the default gateway for devices on the network.
In the event that one of the routers fails, the remaining routers will detect the failure and one of them will take over the virtual IP address. This allows devices on the network to continue sending traffic without interruption.
LACP (Link Aggregation Control Protocol) is a protocol that allows multiple physical links to be combined into a single logical link. This can increase the bandwidth and provide redundancy, but it does not provide a failover mechanism for the default gateway.
OSPF (Open Shortest Path First) is a routing protocol that is used to determine the best path for traffic to take through a network. It does not provide a failover mechanism for the default gateway.
STP (Spanning Tree Protocol) is a protocol that is used to prevent loops in a network by blocking redundant paths. It does not provide a failover mechanism for the default gateway.