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2. What is the difference between NTP and Berkeley algorithm? (refer to slides #18-21 of Week 4 lecture)Cristians Time Sync Algorithm (NTP) • Getting the current time from a time server т, т. 6 6T • Computing the relative offsetBerkeley algorithm • Cristians algorithm - 1989 . a single time server might fail, so they suggest the use of a group of synThe Berkeley Algorithm (1). Time daemon • The time daemon asks all the other machines for their clock values. 3:00 3:00 3:00The Berkeley Algorithm (2) • The machines answer. 3:00 2:50 3:25

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Both are clock sync algorithm the major difference us that in Berkeley algorithm the avg time of all the client is calculated and the mean or average is put as the central time whereas in NTP the central server issues the time to all it clients via access and request method here the central server dominates and the simplest form of physical clock synchronization

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