VLAN (n)~ A logical grouping of hosts on one or more local area networks (LANs) that allows communication to occur between hosts as if they were on the same physical LAN. VLAN Trunk mode (n)~ Trunk mode provides network services or network appliances on a VM with the ability to see traffic from multiple VLANs; a switch port receives traffic from all VLANs that you configure in an allowed VLAN list or through a VM connection. VLDB (n)~ A database that has become large enough to be a management challenge requiring extra attention to people processes and processes.