20Appendix B: GlossaryDefault PasswordA password set by the manufacturer that is unique to each device and is used toGenerate a Default Encryption Key (DEK). The DEK is used only for the purposeof encrypting management commands that change the NEK so that the NEK isnever sent in the clear over the powerline.DHCPDynamic Host Configuration Protocol is a method in which IP addresses areassigned by server dynamically to the clients on the network. DHCP is used forDynamic IP Addressing and requires a dedicated DHCP server on the network.Encryption Key (EK)64-bit pattern generated by a key derivation function. An EK is used in anencryption algorithm to add security to transmissions between Powerline devicesin a logical network.EthernetEthernet is a 10/100Mbps network that runs over dedicated home/office wiring.Users must be wired to the network at all times to gain access.GatewayA gateway is a hardware and software device that connects two dissimilarsystems, such as a LAN and a mainframe. In Internet terminology, a gateway isanother name for a router. Generally a gateway is used as a funnel for all trafficto the Internet.IEEEThe Institute of Electrical and Electronics Engineers. The IEEE describes itself as“the world’s largest technical professional society—promoting the developmentand application of electro technology and allied sciences for the benefit ofhumanity, the advancement of the profession, and the wellbeing of ourmembers.”Local Area Network (LAN)A LAN is a group of computers, each equipped with the appropriate networkadapter card connected by cable/air, that share applications, data, andperipherals. All connections are made via cable or wireless media, but a LANdoes not use telephone services. It typically spans a single building or campus.Logical NetworkTwo or more Powerline devices that share a common Network Encryption Key(NEK) and that communicate with encrypted transmissions.