Zscaler
ZIA: Zscaler Internet Access ( # Proxy )
ZPA: Zscaler Private Access is a cloud service from Zscaler ( # VPN )
ZTE: Zero Trust Exchange : Zscaler Cloud ( DCs, "switchboard" )
ZDX: Digital eXperience ( Performance tools )
ZIA: Zscaler Internet Access
ZPA: Zscaler Private Access
ZScaler has an interesting approach, they have moved the security model up the network stack from ISO Layer 3 to 7 and based the entire system on Domain Name Systems (DNS) instead of Internet Protocol (IP).