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An access switch is a switch that almost always only runs Layer 2 or Ethernet, it does not router packers only forwards frames. An access switch may only have end user computers attached and a connection (or multiple connections using LACP) to the core switch.You may also have servers connected to theaccess switch, but this may or may not be a good idea.n access switch may only have end user computers attached and a connection (or multiple connections using LACP) to the core switch. You may also have servers connected to theaccess switch, but this may or may not be a good idea.
Network switches store a list of MAC addresses seen at every port and only forward packets to the ports that need to see the packet. Wireless access points often use MAC addresses for access control. They only allow access for known devices (MAC address is unique and identifies devices) with the correct passphrase.