From the course: CCNP Switching (300-115) Cert Prep: 1 Layer 2 Technologies

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VLAN creation and access ports

VLAN creation and access ports

- [Instructor] Virtual LANs are what every modern enterprise network is built on, and is one of the core concepts covered in the CCMP's switching exam. VLANs breakup flat network topologies by logically separating the network at layer two. This is fundamental for segregating networks segments for security, as well as performance reasons. A VLAN consists of a single broadcast domain, so only members of that same VLAN will hear them. Members can exist on the same switch or be spanned across multiple switches, so long as they are a member of the same VLAN. VLAN membership can be assigned in one of two ways, either statically or dynamically. Dynamic is beyond the scope of this test, but in short the switch will query a database using the hosts MAC address and alocate the VLAN based on the response. Static configuration is done per port, so when a host connects to a VLAN assigned port, there is no negotiation necessary. It will be communicating on that VLAN. In fact, the in host will be…

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