Network

DNS

Record types

Type	Description	Name	Value
A	stores IPv4 address	web-server	244.178.44.111
AAAA	stores IPv6 address	web-server	2b5b:1e49:8d01:c2ac:fffd:833e:dfee:13a4
CNAME	maps to another hostname	food.web-server	eat.com, hungry.com

Switch

To connect two systems, we need a switch and also we need an interface to connect to the switch.

Router

A router helps connect networks together.

Gateway

If the network was a room, the gateway would be the door to the outside world.