DES facts
DES uses 64bit keys, although the effective key length is only 56 bits The decryption operation for both DES and 3DES is the same as the encryption operation.
Tag: 3DES
Network Trace of a ping in IPSEC tunnel
If you perform a network trace of a ping going through an IPSec/3-DES tunnel, it would be true with respect to the appearance of a tunneled/encrypted packets, that the same key
DES & 3DES Key Lengths
Key Lengths: DES 56bits 3DES 168 bits.