You are actually using a bash terminal. Konsole is a kind of emulator. I am quoting an answer from unix stack exchange site, when you can find more info about the type of shell you are using.
/etc/passwd defines the default shell for the user, of which bash is just the most common option. Alternatives to bash are zsh, ksh, csh etc. You can google each of them to find out more about them. The default shell is the program that will be run inside of Konsole, which essentially can work with any shell or terminal program for that matter.
(P.S /bin/sh is bash (Bourne Again SHell) terminal.)