What routing protocol is the most popular distance-vector routing algorithm used to determine the best routes within a network?
a. ripb. ospfc. bgpd. igmp

Routing Information Protocol (RIP) is the correct option.

Explanation:

Open Shortest Path First (OSPF) is a routing protocol used to find the optimal path between the source and the destination using Shortest Path First. It is a network layer protocol. Its a link state protocol not a distance vector routing protocol so its not a correct option.

Border Gateway Protocol (BGP) is intended to exchange information on routing and accessibility between autonomous systems over the Internet . It doesn't use distance vector routing but uses path vector routing instead, So its not a correct option.

IGMP (Internet Group Message Protocol) is a networking protocol used on IP networks for hosts and neighboring routers for forming memberships in multicast groups. IGMP works on the network layer. Its also not a correct option.

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