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Data-link layer
The second layer of the OSI model. Responsible for connections handling, integrality checks and determining the route between systems
Network layer
The third layer of the OSI model. Responsible for routing and control functions providing informations about routes during the packet exchange between networks
Node
The connection point that can receive, create or send data in network
Transport layer
The fourth layer of the OSI model. This layer is responsible for setting-up connections and segmentating data acquired from the network layer. Handles connection-oriented and connectionless communication
Session layer
The fifth layer of the OSI model. It is responsible for creating sessions and provides services responsible for sessions handling and security
Connection-oriented communication
The network communication model in which communication session is estabilished before any useful data can be transfered
Connectionless communication
The data transmission method used in packet switching networks in which each data unit is individually addressed and routed
Print server
The device that connects printers to client computers over a network
Presentation layer
The sixth layer of OSI model that formats data provided by application and session layer and encrypts data sent from the application layer
Applications layer
The seventh layer of the OSI model that consists of user's software
Database server
The computer program that provides database services to other computers
Mailing list server
The server that manages mailing lists for groups of users
PM
The modulation based on switching a signal on and off according to bits values
AM
In this modulation data is mapped into the amplitude of transmitted signal (amplitude above the given threshold is interpreted as logical 1)
FM
In this modulation data is represented as fluctuation in signal frequency