What is the meaning of the following terms?

A routing loop is a serious network problem which happens when a data packet is continually routed through the same routers over and over.In computer networking, split-horizon DNS, split-view DNS, or split DNS is the facility of a Domain Name System (DNS) implementation to provide different sets of DNS information, selected by, usually, the source address of the DNS request.The main disadvantage of poison reverse is that it can significantly increase the size of routing announcements in certain fairly common network topologies, but it allows for the improvement of the overall efficiency of the network in case of faults. Split horizon states that if a neighboring router sends a route to a router, the receiving router will not propagate this route back to the advertising router on the same interface.

A Routing loop is a common problem with various types of networks, particularly computer networks.

A Split horizon is a method of preventing a routing loop in a network.

A poison reverse is a way in which a gateway node tells its neighbor gateways that one of the gateways is no longer connected.

Routing Loop:

Routing Loops are a risk in networks that utilize an older dynamic routing protocol like RIP. A routing loop is a scenario where data, instead of being routed to its correct destination, is sent from router to router endlessly. This scenario can be caused by routers not receiving updated routing information quickly enough, and as a result, forwarding packets incorrectly and propagating routing information to neighbor routers incorrectly.

Split Horizon

 is a method of preventing routing loops in distance vector routing protocols by prohibiting a router from advertising a route back onto the interface from which it was learned. Thus when a device that participates in such route advertisements receives an update from an interface, it (the device) does not forward updates through the same interface out. By doing so, routing loops are prevented.

Poison Reverse

 allows a router to advertise a route as unreachable.poison reverse eases the removal of a route by immediately advertising to other routers that it is unreachable

routing loop generally appear when two connected routers use a default route or static route to each other ...

split horizon and poison reverse are two ways to resolve the problem of routing loop