Please answer the following questions.

QUESTION 3 An IP addressing scheme that restricts the networking portion of an IP address to 8, 16, or 24 bits in length is called 1.none of the above 2.classfull 3. address block 4. classless QUESTION 5 The taking of an IP datagram and breaking it into pieces if called 1.subnetting 2.optimizing 3. fragmenting 4. none of the above QUESTION9 n a TCP/IP connection, the network layer has two important functions nd S_and 1.flow, control 2. connecting, switching 3.forawrding, routing 4. acknowledge, negative acknowledge