Which of the following contraceptive methods act by blocking the entry of sperms through the cervix?

Diaphragms, cervical caps and vaults are barriers made of rubber that are inserted into the female reproductive tract to cover the cervix during coitus. They preventconception by blocking the entry of sperms through the cervix. They are reusable. IUDs, tubectomy and implants are all contraceptive methods which do not prevent sperm entry but act in many different ways.