List of Figures

Figure 1.	Implementation Model	5

Figure 2.	NTP Time Formats	7

Figure 3.	On-Wire Protocol	14

Figure 4.	Receive Processing	18

Figure 5.	Client Packet Processing	19

Figure 6.	Timestamp Processing	20

Figure 7.	Packet Processing	20

Figure 8.	Clock Filter Processing	22

Figure 9.	clock_select() Routine	26

Figure 10.	Selection Algorithm	27

Figure 11.	accept() Routine	27

Figure 12.	Clustering Algorithm	28

Figure 13.	clock_combine() Routine	29

Figure 14.	clock_update() Routine	29

Figure 15.	System Variables Processing	30

Figure 16.	Clock Discipline Feedback Loop	31

Figure 17.	Clock Discipline Loop Filter	32

Figure 18.	local_clock() Routine (1 of 2)	34

Figure 19.	local_clock() Routine (2 of 2)	35

Figure 20.	clock_adjust() Routine	36

Figure 21.	poll() Routine	38

Figure 22.	transmit() Routine	39

Figure 23.	poll_update() Routine	39

Figure 24.	NPv4 Header Format	41

Figure 25.	NTPv4 Extension Field Format	42