Audio codecs are software components that compress and decompress audio data to reduce file size and improve transmission efficiency. There are various types of audio codecs, each with varying levels of compression and quality. Understanding audio codecs requires specialized knowledge of digital audio and software programming.

H.264/MPEG-4 AVC refers to a digital video compression standard used to reduce file size while preserving visual quality. The standard is used to encode, decode, and transmit video for streaming, broadcasting, conferencing, and media storage. In work contexts, this skill supports efficient delivery and playback of video across devices and network environments.

HTTP Live Streaming (HLS) is a streaming protocol for delivering live and on-demand content over the internet. It segments media files into smaller chunks and delivers them over HTTP. HLS is widely used in video streaming platforms and requires specialized skills to set up, configure, and maintain. It involves understanding the different components, such as encoders, media players, and CDNs, and how they work together to deliver a seamless viewing experience to end-users.

OpenWrt is an open-source operating system designed for routers and other network devices. It allows users to customize and configure their network devices to suit their specific needs, and supports a wide range of hardware and protocols. It is highly flexible and modular, making it a popular choice for network enthusiasts and professionals.

Protocol Stack is a technical skill that involves understanding how different communication protocols work together to enable the exchange of data between devices in a computer network. It requires expertise in various layers of the network stack, including physical, data link, network, transport, session, presentation, and application layers. A deep understanding of this skill is essential for network engineers, software developers, and other IT professionals who design, build, and troubleshoot communication networks.