Definitive H.323 for engineers
5.0(3)Network management technologies
5.0(3)CWISA Wireless IoT Solutions Administrator
5.0(3)Definitive SIP in the IMS for engineers
5.0(3)Total BGP for engineers
5.0(3)CentOS system administration
5.0(3)Debian system administration
5.0(3)Ubuntu system administration
5.0(3)