BTM 200 Lecture Notes - Lecture 15: Virtual Private Network, Extranet, Communications Protocol
2 Jun 2020
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Lecture 15: database servers store data but not programs. Print servers connect 1+ printe: peer to peer (p2p) All computers on the network are equal and communicate directly with each other without relying on servers. Intranets, extranets, vpns *use the internet as their base. All 3 of these use firewalls as security (a system of hardware &/or software that protects system from intruders) Wire = twisted pair, coaxial cable, fiber optic cable. Hosts and nodes - client/server network has a host computer which controls the network; a node is any device attached to the network. Packets = fixed length blocks of data for transmission. Protocols = set of conventions (or rules) governing exchange of data between hardware/software components in the network; built into the hardware/software you are using. The protocol in your communications software specifies how receiver devices will acknowledge sending devices (a matter referred to as handshaking. ) Handshaking establishes the fact that the circuit is available and operational.
