The document contains a timeline of events or milestones spanning from 1999 to 2018, marked by abbreviations and icons. It includes references to various protocols and technologies such as NTP, DNS, and SSDP. The repetitive nature of symbols suggests a structured approach to presenting information.

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3. 1999
2001
2003

4. 2007
2008
2003

5. 2013
2016
2016
NTP
DNS
SSDP

6. IX 2016
IX 2016
II 2018

8. v
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v
v

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19. GbE