Challenges of Physical Clocks in Distributed Systems
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Questions and Answers

What are the potential issues with NTP in time synchronization?

Network latency, misconfigurations, network disruptions, security vulnerabilities, clock drift

How does GPS provide time signals for clock adjustment?

Satellites transmit precise time signals that receivers use to adjust their clocks.

What is a major strength of using GPS as a time source?

Highly accurate due to atomic clocks on satellites.

What is a weakness of using GPS for time synchronization?

<p>Relativistic effects causing time to run slightly faster on satellites.</p> Signup and view all the answers

How does network latency impact time synchronization in distributed systems?

<p>Delays in communication can introduce inaccuracies in time synchronization.</p> Signup and view all the answers

What are the challenges with drift in physical clocks?

<p>Physical clocks can drift over time, requiring periodic resynchronization.</p> Signup and view all the answers

How does NTP address potential security vulnerabilities in time synchronization?

<p>Authentication mechanisms exist to secure time information.</p> Signup and view all the answers

What is the significance of leap seconds in UTC time?

<p>Leap seconds are added to UTC to account for variations in the Earth's rotation.</p> Signup and view all the answers

Explain the concept of limited causality in distributed systems.

<p>In distributed systems, events may occur in an order that is impossible to determine causally.</p> Signup and view all the answers

Why is NTP considered widely adopted in various systems?

<p>It serves as a de facto standard for time synchronization.</p> Signup and view all the answers

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