People who practice racial or ethnic discrimination are usually also prejudiced, but not always. Some people practice discrimination without being prejudiced, and some may not practice discrimination even though they are prejudiced.
Individual discrimination is common and can involve various kinds of racial slights. Much individual discrimination occurs in the workplace.
Institutional discrimination often stems from prejudice, but institutions can also practice racial and ethnic discrimination when they engage in practices that seem to be racially neutral but in fact have a discriminatory effect.