Which one of the following algorithms is used to send large blocks of data across a VPN tunnel?

Which one of the following algorithms is used to send large blocks of data across a VPN tunnel?


Diffie-Hellman


SHA


DES


MD5|||Diffie-Hellman - key exchange

SHA- hashing algorightm

DES - encryption algorithm

MD5 - hashing algorithm



Trick question their all used in VPN. DES is the one possibly encrypting/decrypting so I'd go for that, basically if SHA is right so could MD5 as they can both be used to verify packet integrity ...so can't be that. And Diffie a setup thing so maybe not.



However DES is not secure so Im real dubious.



I think SHA and MD5 is right as the question seems to be referring to data integrity checks (large blocks) if I can have 2 answers otherwise if one answer DES but id really think this is not right, no-one should use it basically its that weak.