This ability includes being able to meet these objectives:
?– Describe how and when to implement and verify VLANs and trunking, and then
implement them on the network
?– Describe situations in which a spanning tree is used, and implement it on the network
?– Describe the application and con?¬?guration of inter-VLAN routing for a medium-sized
routed network
?– Describe situations in which security is required at Layer 2, and implement it on the
network
?– Identify an approach for troubleshooting and isolating common switched network
problems, and offer solutions
Implementing VLANs and Trunks
A VLAN is a logical broadcast domain that can span multiple physical LAN segments. It
is used to group end stations that have a common set of requirements, independent of their
physical locations. A VLAN has the same attributes as a physical LAN, except that it lets
you group end stations even when they are not physically located on the same LAN
segment. A VLAN also lets you group ports on a switch so that you can limit unicast,
multicast, and broadcast traf?¬?c ?¬‚ooding. Flooded traf?¬?c that originates from a particular
VLAN ?¬‚oods to only the ports belonging to that VLAN.
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