- Important Components
- How different protocols fit together
In the context of computer networking, a firewall controls traffic passing through a point in the network, either by forwarding it on, or dropping it, normally based on applying some rules. The term comes from a physical wall used to prevent the spread of fire.
A proxy is a service that acts as an intermediary in a connection across a network.
How different protocols fit together
The OSI 7-layer model
The TCP/IP 4-layer model
GNU Network Utilities (inetutils)
ip command, that can be used to find out about network
interfaces and many other things when using Linux.
Domain Name System tools (bind)
dig (DNS Lookup Utility)
dig can be used to perform DNS lookups for exploratory or diagnostic purposes.