Answer-Distance-vector routing protocols (such as RIP) can suffer from the 'count-to-infinity' problem afte...

Split horizon prevents a router from advertising a route back out the same interface from which it originally learned that route, breaking the cycle of routers repeatedly reflecting stale routing information back and forth to each other after a failure. A stronger variant, split horizon with poison reverse, explicitly advertises such routes back with an infinite metric marking them as unreachable rather than simply omitting them, further speeding up convergence. RIP also independently caps hop count at 15 16 unreachable as an additional safeguard, but split horizonpoison reverse is the primary mechanism designed specifically to prevent the routing loops that cause count-to-infinity.

Question

Distance-vector routing protocols (such as RI

P can suffer from the "count-to-infinity" problem after a link failure, where routers keep incrementing hop counts based on stale information received from each other. Which mechanism is commonly used to help mitigate this problem?

A Increasing the maximum transmission unit (MTU) of all links in the network

B Split horizon, which prevents a router from advertising a route back out the same interface it was learned from

C Switching from UDP to TCP for all routing protocol messages

D Increasing the TTL field of all routing update packets

E Disabling all routing updates until the network administrator manually reconfigures the routers

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