Operating System
Microsoft Server
Microsoft Windows
Oracle Linux, Oracle Solaris
Red Hat Linux
SUSE Linux
macOS
Open Source:
FreeBSD, NetBSD, OpenBSD
Debian, Ubuntu
Fedora Linux
Server Hardware
Dell, HP, Oracle, Supermicro
Custom Built
Virtualization
Oracle Virtualization
VMware
Microsoft Hyper-V
Parallels
Nutanix
Open Source:
Xen, KVM, Openstack, Proxmox
Telephony
Circuit Switched:
T1, E1, T3, E3 Primariy Rate Interface (PRI)
Signaling System Number 7 (SS7)
VoIP:
Cisco Unified Communications
Cisco Voice Gateways & IP Phones
3CX Phone & Contact Center Systems
Bicom Unified Communications Systems
VoIP Open Source:
Asterisk, FreePBX, Elastix, Trixbox, AsteriskNow
Network Security
IPSec and SSL VPNs
Fortinet
Juniper Security Platforms
Check Point Security Systems
F5 Networks
Brodcom Solutions
Open Source iptables
pfSense & VyOS
OpensDNS Security
Network Driven Anti-virus, Anti-spyware, Anti-phishing, Anti-adware & Anti-spam
Networking
Local Area Network (LAN):
10 to 800 Gigabit Ethernet
Over copper & SM or MMF fiber
LAN Wi-Fi IEEE 802.11 g, n, ac, 6 & 7
Bluetooth, ZigBee, Z-Wave, Radio-Frequency Identification (RFID)
Wide Area Network (WAN):
Gigabit & 10 Gigabit Ethernet
Synchronous Optical Networking (SONET) & Synchronous Digital Hierarchy (SDH)
Wavelength-Division Multiplexing (WDM)
Over MMF & SMF fiber
Asynchronous Transfer Mode (ATM)
Asymmetric Digital Subscriber Line (ADSL) &
Symmetric Digital Subscriber Line (SDSL)
Data Over Cable Service Interface Specification (DOCSIS) & Hybrid Fiber-Coaxial (HFC) Networks
Passive Optical Networking (PON) – GPON & xPON
Fixed & Mobile General Packet Radio Service (GPRS)
3G, 4G/LTE, & 5G
Starlink, Satellite Ku Band & C Band
Hardware:
Fortinet, Juniper, Cisco, Dell, Brodcom, Arista, Aruba, Ruckus, F5 Networks, ExtremeNetworks, Ubiquiti/UniFi, TRENDnet