MTU(Maximum Transmission Unit)
The largest packet size a network link will carry without fragmenting it.
The default is usually 1500 bytes. 'Jumbo frames' (MTU ~9000) can improve throughput between a NAS and workstation on a dedicated storage network, but every device in the path must agree or you'll get mysterious slowdowns.
Related articles
VLAN(Virtual LAN)
A logical network segment that isolates traffic on shared physical switches.
Subnet
A logical subdivision of an IP network, defined by a mask that separates the network and host portions of an address.
NAS(Network-Attached Storage)
A dedicated storage device connected to your network that lets multiple devices store and access files centrally.