1. http://www.n2nconnect.com http://www.n2nconnect.com
2. Cisco Networking Academy 2013: Exploring the Modern Computer Network: Types Functions and Hardware https://www.ciscopress.com/articles/article.asp?p=2158215&seqNum=5 Cisco Networking Academy 2013: Exploring the Modern Computer Network: Types Functions and Hardware https://www.ciscopress.com/articles/article.asp?p=2158215&seqNum=5
3. https://www.helpsystems.com/resources/guides/automated-operations-5-benefits-your-organization https://www.helpsystems.com/resources/guides/automated-operations-5-benefits-your-organization
4. N. Murphy J. Looney and M. Kacirek 2017: The Evolution of Automation at Google https://landing.google.com/sre/sre-book/chapters/automation-at-google/ N. Murphy J. Looney and M. Kacirek 2017: The Evolution of Automation at Google https://landing.google.com/sre/sre-book/chapters/automation-at-google/
5. M. Rouse 2018: IT Systems Management: Monitoring Tools https://searchitoperations.techtarget.com/definition/Zabbix M. Rouse 2018: IT Systems Management: Monitoring Tools https://searchitoperations.techtarget.com/definition/Zabbix