What is the price of a $100 piece of clothing that is on sale for 30% off?
30% of 100 is $30. $30 off of $100 is $70.
Explain the difference in UDP and TCP.
TCP is a connection-oriented protocol that is used for transmissions that have to have the packets arrive in a certain order, while UDP is connectionless, where the packets don't have to be in a certain order so long as they all arrive.
What is the difference between a NAS system and a SAN system?
The protocol type. NAS uses file-based protocols such as CIFS and NFS while SAN uses block-based such as Fiber Channel or iSCSI