A 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.
An additional broadcast domain will be created.

C.
More bandwidth will be required than was needed previously.

D.
IP address utilization will be more efficient.

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.
VLAN (Virtual Local Area Network) technology is to solve the problem that switches can’t limit
broadcast within the LAN interconnection. This technology can divide a LAN into more logical
LAN- VLAN, each VLAN is a broadcast domain, the communication between the hosts within a
VLAN is like that of the hosts in a LAN, while the communication can’t be achieved between
VLANs directly. Thus the broadcast datagram is limited within a LAN. So, creating a new VLAN on
switch is the same as adding a new broadcast domain.