Algorithms, Golang, Systems Programming, Tcp, UDP, Web Servers, Unix Shell Scripting, Concurrent Programming, Dns, Http, SSL, Load Balancers, Https, Linux, Perl, Distributed Systems, Unix Internals, Sockets, data structures, Tls, Python, Ip, Web Application Firewalls

Ipsec, Nat, C, Ipv4, Ipv6, SSL, routing, Vpn, L4 networking protocols, DPDK, OFP, ODP