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Which four statements correctly describe a Layer 2 Switch, VLAN and a Hub?
VLANs add more security to the network
A switch operates at the physical layer of the OSI Model
A Hub operates at the Layer 1 of the OSI Model
When configured with VLANs, a switch increases the size of broadcasts while increasing the number of collision domains
When configured with VLANs, a switch decreases the size of broadcasts while increasing the number of broadcast domains
A switch will have more than one broadcast domain if configured with VLANs
A switch, when configured with additional VLANs will have more broadcast domains. By default, a switch has one big broadcast domain (VLAN 1). A switch is a layer 2 device while a hub is layer 1 device. A layer 2 switch with more than one VLAN configured decreases the size of broadcast, size is different from number. The bigger the size, the more broadcast traffic the switch needs to handle, and because the bandwidth is shared among all users, this will render the LAN slow and unresponsive. By increasing the number of broadcast domains (by adding VLANs), the effective broadcast traffic will decrease, thus improving performance and security (by separating logical networks by function). For additional information about hub and switch, visit http://www.diffen.com/difference/HubvsSwitch
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