Encapsulation is a process by which a lower-layer protocol receives data from a higher-layer protocol and then places the data into the data portion of its frame.

EIA was the main trade organization representing the U.S. high-tech community. The Electronic Industries Alliance (EIA) was founded in 1924 as the Radio Manufacturers Association.

EMI, Electromagnetic Interference, is electrical noise induced in cabling by the presence of nearby electrical equipment such as motors, air conditioners, fluorescent lights, and power lines.

Effective Permissions is the cumulative permissions a user has for accessing a resource based on his or her individual permissions, group permissions, and group membership.