Systems
- Linux
RedHat/CentOS/Fedora, Slackware, Ubuntu, ...
- Windows 2012+
with ActiveDirectory or standalone
with Clients (Windows 10, Windows 8, ...)
- Unix (most outdated / to migrate from)
Solaris, Irix, HPUX, AS/400, ... (almost any flavor)
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Infrastructure
- Networks
+ LAN (DNS, DHCP, PXE, NIS+, ...)
+ WAN (VPN, AS, BGP, 4G, 5G, ...)
+ SAN (FC, iSCSI, MultiPath, DeviceMapper, ...)
- Storage
+ SAN (EMC Clariion, NetApp, DELL EqualLogic/Compellent/PowerVault, ...)
+ MD/MP/RAID hardware and software (Linux)
- Security
+ Cryptography (encryption, signature, blockchain, ...)
+ Intrusion prevention (packet filter, software signature, ...)
+ Intrusion detection (facility, network and system surveillance)
+ System forencics (post-incident, continuous improvement, ...)
- Hardware
+ Server (rack mount, cluster, tower, ...)
+ Workstation, Desktop, Laptop, ThinClient, ...
+ Appliance (physical and virtual)
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