Network Time Protocol Concepts

To improve network speed

To ensure accurate log files and authentication

To save energy

To reduce hardware costs

SMTP

NTP

FTP

HTTP

TCP port 80

UDP port 123

TCP port 443

UDP port 53

To request and update its time from an NTP server

To store log files

To provide time updates to other devices

To manage network traffic

A device that provides the least accurate time

A device that does not synchronize time

An atomic clock providing very accurate time

A device that only receives time updates

Stratum zero

Stratum two

Stratum three

Stratum one

Stratum zero and one

Stratum one and two

Stratum three and four

Stratum two and three

The IP address of the device

The NTP servers used for synchronization

The network speed

The MAC address of the device

To improve security

To increase network speed

To reduce power consumption

To ensure synchronization if the primary server is unavailable

The highest stratum device

The device with the most recent update

The lowest stratum device

The device with the fastest response time