Term Definition
Address resolution protocol (ARP)

a communication protocol used for discovering the link layer address, such as a MAC address, associated with a given internet layer address, typically an IPv4 address. Layer 2.

In IPv6 networks, the functionality of ARP is provided by the Neighbor Discovery Protocol.

Data Circuit-terminating Equipment a device that sits between the data terminal equipment (DTE) and a data transmission circuit. Usually, the DTE device is the terminal (or computer), and the DCE is a modem.
Data terminal equipment Terminal: converts user information (characters from keyboard) into signals. Or reconverts received signals in user informations (characterss on monitor).
Datagram A self-contained, independent entity of data carrying sufficient information to be routed from the source to the destination computer without reliance on earlier exchanges between this source and destination computer and the transporting network (RFC 1594)
End devices provides an interface between the human and the network.
interface porte specializzate in un networking device che connettono reti individuali (di solito, nei router)
Intermediary devices provides connectivity and ensures data flows across the network.
LAN adapter vedi Network interface card
latency tempo, incluso i ritardi, necessario perché i dati viaggino da un punto della rete ad un altro
Network media provides a channel for messages to travel from source to destination.
Network interface card (NIC) fornisce la connessione fisica dell’end device alla rete
physical port connettore di un network device dove viene collegato il mezzo di trasmissione
Shell The user interface that allows users to request specific tasks from the computer.