The Masterclass For IT Networking Fundamentals From Scratch

Learn core networking concepts, including networks, computer networks, devices, client–server models, packets, ipv4/ipv6 addresses, internet vs world wide web, iot, and basic protocols.

Explore the OSI and TCP/IP reference models, their seven versus four layers, differences between conceptual and implemented frameworks, and how hybrid models shape modern networking.

Explore the physical layer of the OSI model through a simplified single-link view, covering bandwidth, transmission and propagation delays, latency, and media choices.

Explore the data link layer of the OSI model, focusing on framing, reliable transmission, and error and flow control, including character count, flag bytes, and bit stuffing.

Explore error detection and error control techniques for noisy wireless transmissions, including parity, internet checksum, CRC, and Hamming code, and understand their impact on error correction.

Explore data link layer concepts, including flow control mechanisms, stop-and-wait, sliding window, go-back-n and selective repeat, and their impact on link utilization, error handling, and throughput.

Understand the mac sublayer concepts, from aloha and slotted aloha to csma and maca, including collision free protocols, collision avoidance, and ethernet performance formula.

Explore the network layer, with IP addresses, subnetting, and packet forwarding by hosts, routers, switches, and hubs. Understand datagram versus virtual circuit models, plus tunneling, fragmentation, and path MTU discovery.

Explore IPv4 and IPv6 addressing, subnet masks, and how network and host portions enable subnetting, with notes on private ranges and NAT.

Explore routing algorithms that discover paths and forward packets, comparing static vs dynamic routing and covering shortest-path routing, Dijkstra, hierarchical and broadcast routing, and reverse path forwarding.

Explains the transport layer's role in reliable data transfer and its service types, including TCP and UDP, and shows how encapsulation and a three-way handshake enable connection establishment and reliability.

Explore sockets, tcp and udp, including connection-oriented reliability, port numbers and video streaming and gaming, and how tcp's three way handshake, sliding window, slow start, and congestion control regulate traffic.

Explore how the domain name system converts IP addresses to host names to perform name resolution, supporting aliasing, mail registry, load distribution, and DNS hierarchy from root to authoritative servers.

Explore the application layer fundamentals, including world wide web components, http methods and message structure, cookies and caching, email protocols, mime types, and multimedia streaming challenges like buffering and compression.

Explore core network security concepts from confidentiality, integrity, availability to authentication and non-repudiation, and learn cryptography, PKI, and RSA-based key exchange.