A workgroup switch is configured with all ports assigned to VLAN 2. In addition, all ports are
configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on
this switch?
A.
The additions will create more collisions domains.
B.
IP address utilization will be more efficient.
C.
The possibility that switching loops will occur will increase dramatically.
D.
An additional broadcast domain will be created.
E.
More bandwidth will be required than was needed previously.
Explanation:
A VLAN is a group of hosts with a common set of requirements that communicate as if they were
attached to the same wire, regardless of their physical location. A VLAN has the same attributes
as a physical LAN, but it allows for end stations to be grouped together even if they are not located
on the same LAN segment.
Networks that use the campus-wide or end-to-end VLANs logically segment a switched network
based on the functions of an organization, project teams, or applications rather than on a physical
or geographical basis. For example, all workstations and servers used by a particular workgroup
can be connected to the same VLAN, regardless of their physical network connections or
interaction with other workgroups. Network reconfiguration can be done through software instead
of physically relocating devices.
Cisco recommends the use of local or geographic VLANs that segment the network based on IP
subnets. Each wiring closet switch is on its own VLAN or subnet and traffic between each switch is
routed by the router. The reasons for the Distribution Layer 3 switch and examples of a larger
network using both the campus-wide and local VLAN models will be discussed later.
A VLAN can be thought of as a broadcast domain that exists within a defined set of switches.
Ports on a switch can be grouped into VLANs in order to limit unicast, multicast, and broadcast
traffic flooding. Flooded traffic originating from a particular VLAN is only flooded out ports
belonging to that VLAN, including trunk ports, so a switch that connects to another switch will
normally introduce an additional broadcast domain.