Time and Global States: Lecture 5

Question 1

Formula to set my clock given a time from Time Server (S)

Answer 1

S given Time + (Total Round-trip Time / 2)

Question 2

Accuracy of setting with respect to the server’s clock (D)

Answer 2

1/2 Round-trip Time - T min

or

1/2 Round-trip Time

Question 3

Three modes of synchronisation between NTP servers

Answer 3

1) Multicast
2) Procedure-call
3) Symmetric