Modern Network Infrastructure (Part 1) - OSI, TCP/IP & Subnets | Network & Security Full Course

Every secure enterprise starts with a rock-solid foundation. Master the core of IT networking in Part 1 of this complete Modern Network Infrastructure course. Designed for IT professionals and those studying for CompTIA Network+ or CCNA, this masterclass breaks down exactly how data travels. You will master the OSI Model, TCP/IP protocols, and subnetting, while learning to configure essential physical and logical architecture like routers, enterprise firewalls, DHCP, and DNS. Ready to secure your network? Once you master the infrastructure, learn how to defend it against real-world threats in Part 2: Watch Part 2 Here:    • Cyber Defense & Network Security (Part 2) ...   Timestamps & Course Curriculum Section 1 & 2: Introduction & The OSI Model 0:00:00 Course Introduction 0:01:56 OSI Model - Part 1 0:09:37 OSI Model - Part 2 Section 3: TCP / IP Protocols 0:19:21 TCP / IP Protocols 0:27:00 IPv4 Addressing 0:36:06 Ports And IPv6 Addressing 0:44:38 TCP / IP Review Section 4: Transmission Media And Technologies 0:52:33 Network Media 1:01:05 Network Media Terms - Part 1 1:09:16 Network Media Terms - Part 2 1:17:02 Ethernet Standard 1:26:07 Wireless Technologies 1:31:02 Modulation And Encoding 1:40:28 Network Topologies 1:49:39 Network Sizes (LAN, WAN, MAN) 1:58:29 Transmission Types 2:07:48 Media Access Methods Section 5: Network Infrastructure & Services 2:18:07 Segments, Subnets And Domains 2:26:20 Terms And Definitions 2:33:21 Network Layer Devices - Part 1 2:41:11 Network Layer Devices - Part 2 2:48:27 Data Link Layer Devices 2:57:24 Routers 3:06:09 Firewalls - Part 1 3:14:45 Firewalls - Part 2 3:24:50 Firewalls - Part 3 3:33:03 Firewall Rules 3:41:42 Firewall Architecture 3:50:03 Network Services 3:59:19 DHCP (Dynamic Host Configuration Protocol) 4:09:29 Domain Name Systems (DNS) 4:16:54 DNS Architecture 4:27:42 DNS Resolver 4:36:17 Wrap Up & Next Course Deep Dive: What You Will Learn in Part 1 Understanding network infrastructure is the most critical skill for any modern IT professional. In this comprehensive training, we move past basic concepts and dive deep into enterprise-grade network engineering. The OSI & TCP/IP Models: We demystify how computers communicate, breaking down data encapsulation from the physical layer up to the application layer. IP Addressing & Subnetting: Learn the mechanics of IPv4 and IPv6, how ports function, and how to logically segment networks for better performance and security. Transmission Media & Topologies: Explore the physical layer of networking, comparing Ethernet standards, wireless modulation, and how LANs, WANs, and MANs are structured. Enterprise Hardware & Services: Get hands-on knowledge of how Data Link and Network Layer devices operate. We cover the architecture of routers, switches, and multi-layered firewall rules, alongside critical network services like DHCP and the Domain Name System (DNS). Whether you are starting your Help Desk career or leveling up to Network Engineer, this course provides the exact technical foundation you need to succeed