Tramp can use a number of protocols to connect to remote machines to
read files and even run commands on those files remotely. A popular
one is ssh. As well as Cygwin versions of openssh, you can use
PuTTY’s command line plink program as the ssh client. The relevant
methods to use in tramp-default-method or
tramp-default-method-alist for these options are:
scp Uses scp for copying, ssh for shell operations.
ssh Uses ssh with encoding on stdin/stdout for file transfer.
pscp Uses pscp for copying, plink for shell operations.
plink Uses plink with encoding on stdin/stdout for file transfer.