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Cisco Networking Essentials by Troy McMillan

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Understanding Advanced Switch Functions

Creating VLANs is not required for a Cisco switch to operate. By default, all ports on the switch are in the same VLAN and are set to access mode rather than trunk mode. As long as all of the hosts connected to the switch are configured with the IP address of the router interface to which the switch is connected as their default gateway, everything should work just fine by plugging the hosts into the switch.

The frame-forwarding logic discussed in Chapter 11, “LAN Operations,” works without any configuration on your part. However, one of the key features that most LAN administrators take advantage of is the ability to organize hosts into VLANs that span multiple switches. This removes the need for hosts ...

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