Which two network topologies are the most popular in switching? (Choose two.)

Bus topology uses a single shared medium where all devices contend for the same channel; it is a legacy design not used in modern switched LAN environments.

Token passing bus is an obsolete deterministic media access technology associated with ARCnet; it has no relevance to contemporary Ethernet switching.

Star topology is the most widely deployed in switched networks, where every device connects to a central switch, which isolates failures to individual links and simplifies adds, moves, and changes.

Extended star (hierarchical star) topology scales the basic star by interconnecting multiple access-layer switches through distribution-layer switches, which is the foundation of the Cisco three-tier enterprise campus model used in the vast majority of production networks.

Ring topology, used in legacy Token Ring and FDDI networks, has been replaced by Ethernet switching and is not considered a popular modern LAN switching topology.