1. Which of the following would *not* be a reason why a ping would fail?

   	1.	The destination machine was unplugged.
   	2.	A firewall on the host system was blocking HTTP traffic in the path
   	3.	The destination machine had the network connection unplugged.
   	4.	A firewall was blocking ICMP traffic in the path

10 points

QUESTION 2

1. Which of the following is the key component to making traceroute work?

   	1.	ACK
   	2.	DF
   	3.	SYN
   	4.	TTL

10 points

QUESTION 3

1. Which of the following would be a likely message that would indicate that the traceroute reached it's final destination?

   	1.	Time exceeded
   	2.	Port unreachable
   	3.	Echo reply
   	4.	Echo request