IP-based video surveillance systems have been around since 1996, when market leader Axis Communications introduced the first one to the market. IP cameras are considered a fast-growing market; according to IMS Research, the global network video market grew 42 percent last year. Experts say the reasons for analog’s continued dominance center mainly around upgrade costs and a lack of knowledge about networking technologies in many physical security departments. You can still get some of the advantages of IP while maintaining your investment in analog by using encoders.”]
Source: https://www.csoonline.com/article/2112378/a-buyers–guide-to-ip-surveillance-cameras.html