Layering and architecture

Vocabulary

English	Meaning
computer networks	Connected devices and communication links that exchange data using agreed protocols.
layering/ˈleɪərɪŋ/	Organising communication functions into levels that use services from lower levels.
service/ˈsɜːvɪs/	The communication capability one protocol layer offers to the layer above it.
physical/ˈfɪzɪkl/	The network layer concerned with transmitting bits as signals over a medium.
link/lɪŋk/	The network layer concerned with transferring frames across a local link.
network/ˈnetwɜːk/	A set of connected devices or nodes that can exchange information.
transport/ˈtrænspɔːt/	The protocol layer providing communication between application processes, such as through TCP or UDP.
application	The layer containing protocols used by applications, such as HTTP and DNS.
encapsulated	Packaged within the protocol information needed by a lower communication layer.