What NTP stratum level is a server that is connected directly to an authoritative time source?

IT Questions BankCategory: CCNPWhat NTP stratum level is a server that is connected directly to an authoritative time source?
What NTP stratum level is a server that is connected directly to an authoritative time source? 1ITExamAnswers Staff asked 1 month ago
Question:
What NTP stratum level is a server that is connected directly to an authoritative time source?

  • A. Stratum 0
  • B. Stratum 1
  • C. Stratum 14
  • D. Stratum 15

Explanation: The stratum levels define the distance from the reference clock. A reference clock is a stratum 0 device that is assumed to be accurate and has little or no delay associated with it. Stratum 0 servers cannot be used on the network but they are directly connected to computers which then operate as stratum-1 servers. A stratum 1 time server acts as a primary network time standard.

What NTP stratum level is a server that is connected directly to an authoritative time source? 2

A stratum 2 server is connected to the stratum 1 server; then a stratum 3 server is connected to the stratum 2 server and so on. A stratum 2 server gets its time via NTP packet requests from a stratum 1 server. A stratum 3 server gets its time via NTP packet requests from a stratum-2 server… A stratum server may also peer with other stratum servers at the same level to provide more stable and robust time for all devices in the peer group (for example a stratum 2 server can peer with other stratum 2 servers).
NTP uses the concept of a stratum to describe how many NTP hops away a machine is from an authoritative time source. A stratum 1 time server typically has an authoritative time source (such as a radio or atomic clock, or a Global Positioning System (GPS) time source) directly attached, a stratum 2 time server receives its time via NTP from a stratum 1 time server, and so on.

Reference: https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/bsm/16-6-1/b-bsm-xe-16-6-1-asr920/bsm-time-calendar-set.html

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