When you add ________ to a query you can summarize data by fields

ROT13 is a cyclic shift cipher that substitutes each English letter with one that is 13 away in the alphabet. It is used today not for security, but as a simple obfuscation device, because the same algorithm is used for both encryption and decryption. People wishing to encrypt or decrypt a message, M (such as a spoiler paragraph in a movie review), just cut-and-paste M to a ROT13 converter and

click a button "APPLY" to do the encryption or decryption. Give an example of another ROTi transformation that could be used for both encryption and decryption in a similar way. What will be an ideal response?

At what point does a client send a unicast packet to the DHCP server to request a lease renewal for its current IP address?

A. After 2 hours B. After 4 hours C. When the lease is 50% expired D. When the lease is 80% expired