Kurose 5th/6th ed. chapter 3 problem P6

Kurose 5th ed. chapter 3 problem P11 / 6th ed. chapter 3 problem P12

Kurose 5th ed. chapter 3 problem P25 (change "70 and 50 bytes" to "80 and 40 bytes") / 6th ed. chapter 3 problem P27

Kurose 5th ed. chapter 3 problem P28 / 6th ed. chapter 3 problem P30

Kurose 5th ed. chapter 3 problem P33 / 6th ed. chapter 3 problem P36

Kurose 5th ed. chapter 3 problem P38 / 6th ed. chapter 3 problem P41

Kurose 5th ed. chapter 3 problem P39 / 6th ed. chapter 3 problem P42

Kurose 5th ed. chapter 3 problem P40 / 6th ed. chapter 3 problem P43