Threads in operating system explained: what a thread is, threads vs processes, user and kernel threads, threading models, and Linux and Windows threads.
Process management in operating system explained: process vs program, process states, the PCB, context switching, and process creation and termination.
The main functions of operating system software explained: process, memory, file, device and storage management, security, networking and the user interface.
The main types of operating systems explained: batch, time-sharing, distributed, network, real-time, mobile, embedded and desktop, with examples.
What is an operating system? A clear definition, what an OS does, how it boots, its main parts, and popular examples like Windows, Linux, macOS and Android.
Practical job interview tips for IT and cybersecurity roles: research, the STAR method, technical rounds, online interviews, dress code.
Docker interview questions and answers for freshers and experienced engineers: images, containers, Dockerfiles, volumes, networking, Compose and security.
What DHCP is and how to configure DHCP on a Cisco router: enable the DHCP server, create an address pool, set the gateway and DNS, and verify leases.
Border Gateway Protocol (BGP) explained: how internet routing between autonomous systems works, BGP path selection and common use cases.
AAA in networking explained: authentication, authorization and accounting, RADIUS vs TACACS+, and a working Cisco AAA configuration with local fallback.
