In general, there are three types of nodes that you may encounter: home nodes, extender nodes, and exit nodes:
Flashing, typically, refers to the process of replacing the default firmware of a device with a new, customized firmware. Both home nodes and extender nodes can be flashed. Exit nodes are, usually, full Linux computers and, therefore, require different techniques.
———————————-:|:———————————–: 
| 
The person who associated CC0 with the above images has waived all copyright and related or neighboring rights to this work.