Which of the following splits the network into separate broadcast domains?

A.
bridges

B.
VLANs

C.
switches

D.
hubs

Explanation:
Virtual LANs (VLANs) split the network into separate broadcast domains, as would a router. VLANs are a
software implementation embedded in a switch’s software that allows the switch’s hardware to switch packets
only to ports that belong to the same VLAN.
Neither a switch nor a bridge splits the network into separate broadcast domains. Both a switch and a bridge
are used to create collision domains for each connected node. Collision domains confine traffic destined to or
coming from a particular host to the switch port of that node in the switch. This reduces collisions, which in turn
decreases retransmissions and elevates throughput. Switches work at Layer 2 in the OSI model and perform
the function of separating collision domains. Neither switches nor bridges filter broadcasts and distribute them
across all ports.
A hub does not split the network into separate broadcast domains. A hub regenerates signal when it passes
through its ports, which means that it acts as a repeater and port concentrator only. Hubs and repeaters are
Layer 1 devices that can be used to enlarge the area covered by a single LAN segment, but cannot be used to
segment the LAN as they have no intelligence with regards to either MAC addresses or IP addresses. Hubs
provide a common connection point for network devices, and connect different network segments. Hubs are
generally used for LAN segmentation. Hubs work at Layer 1 of the OSI model, which is the physical layer. Hubs
do not filter broadcasts or create collision domains.
Objective:
Network Fundamentals
Sub-Objective:
Describe the impact of infrastructure components in an enterprise network

Cisco Documentation > Internetworking Case Studies > LAN Switching