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Network



Firewalls

Firewall

A firewall is a network security device or application that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.


Miscellaneous


Protocols

A protocol is a set of rules and guidelines for communicating data. Rules are defined for each step and process during communication between two or more computers. Networks have to follow these rules to successfully transmit data.


Proxies

Proxy

A proxy server is a server that acts as a middleman in the flow of your internet traffic, so that your internet activities appear to come from somewhere else. The traffic usually is not encrypted and for web surfing only. Excellent if you want to share the Bible to China or need to visit websites restricted by your work or school.


Routers


Switches


VPN (Virtual Private Network)

VPN

A VPN is a server that acts as a middleman in the flow of your internet traffic, so that your internet activities appear to come from somewhere else. The traffic is encrypted and for all services. Excellent if you want to ensure nobody is snooping the traffic between your device and the remote site, assuming you are not on wireless.