Cisco Exam Questions

Select the two correct statements from the list below that describe DES and 3DES :

Select the two correct statements from the list below that describe DES and 3DES :(Choose 2 )

A.
DES can only be used for encryption, whereas 3DES can also be used for authentication

B.
The decryption operation for both DES and 3DES is the same as the encryption operation

C.
3DES is much more secure than DES

D.
Both DES and 3DES are stream ciphers

E.
DES uses 64 bit keys, although the effective key length is only 56 bits