Hack the Route Start free Open app Network services
TFTP
The simplest file transfer: UDP port 69, no login, no listing, no encryption. Network devices load images and configs with it.
A client sends a read request (RRQ) or a write request (WRQ) with a file name to UDP port 69; the file then
moves in 512-byte blocks, each acknowledged, between new ports on both sides. There are no accounts and no directory
listing: anyone who reaches the server and knows (or guesses) a name can read or replace the file, and every byte
crosses in the clear. Routers and switches use it for backups and boot images (copy running-config tftp:); SCP
and SFTP do the same job over SSH, with a login and encryption.