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Networking Intermediate

What is QoS (Quality of Service)?

A set of techniques for managing network traffic to prioritize certain types of data and ensure performance for critical applications.

QoS manages bandwidth, latency, jitter, and packet loss by classifying and prioritizing traffic. Voice and video traffic get higher priority than file downloads. Techniques include traffic shaping, policing, queuing, and marking.

Common QoS mechanisms include DiffServ (packet marking), DSCP (priority codes), and traffic policing (drop excess traffic). QoS is essential in enterprise networks for VoIP, video conferencing, and real-time applications that are sensitive to delays.

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The latest version of the Internet Protocol with 128-bit addresses, designed to replace IPv4 and solve address exhaustion.
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A hierarchical naming system that translates human-readable domain names into IP addresses.
SNMP (Simple Network Management Protocol)
A protocol for monitoring and managing network devices like routers, switches, servers, and printers remotely.
DNS Record Types
Different types of DNS entries that map domain names to various information like IP addresses, mail servers, and verification strings.
ICMP (Internet Control Message Protocol)
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Latency
The time delay between sending a request and receiving a response, measured in milliseconds.
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