Network Fundamentals

Modern security work runs on networks. Cameras are IP, recorders are IP, alarms talk over IP, access control is heading there if it is not already. The installers and electricians moving fastest in the trade are the ones who can speak the same language as the customer's IT department — and the ones who can't are increasingly the ones losing jobs to integrators that can. This plan teaches the networking skills you need to pass that conversation, design the right LAN, and commission an IP system without surprises.

It is not an IT engineer's course. It is shaped around the situations CCTV and security installers actually run into: the new IP camera that won't show up; the PoE switch that powers six cameras out of eight; the customer who insists their existing network is "fine"; the IT team blocking your remote access; the storage calculation that comes back wrong on day three of recording.

What this plan covers

Networking foundations

• What a network actually is. LANs, WANs, the internet, and how each piece of equipment plays its part.
• The devices on a network — switches, routers, access points, NVRs, IP cameras — and what each one really does.
• Protocols and packets. TCP/IP plainly explained, what a data packet is, how a message actually travels from a camera to an NVR.
• MAC addresses and how they relate to IP addresses.

IP addressing without the maths fear

• What an IP address actually is. The four numbers, the network part vs the device part, and why this matters on a job.
• Subnet masks and default gateways — explained the way installers actually need to understand them.
• Static IP vs DHCP. When to use each, and how to plan an addressing scheme for a CCTV install.
• IP address conflicts — why they take down systems, and how to avoid them.
• Private vs public IP addressing.

Ports, services and remote access

• What a port is, the common ports security devices use, TCP vs UDP.
• Port forwarding for remote access, and when port forwarding is the wrong answer.
• DNS, DDNS and NTP — what they actually do, when they break, and how to recognise it.

Cabling and the physical layer

• Ethernet, Cat5e vs Cat6, the eight wires inside, RJ45 termination.
• The 100-metre rule and where fibre optic stops being optional.

Switches and PoE

• Unmanaged, managed and PoE switches; how a switch knows where to send data.
• Choosing the right switch for the job.
• PoE standards, the power budget trap, injectors and extenders.
• PoE fault diagnosis on site.

Routers, firewalls, VPNs and VLANs

• Routers, NAT, firewalls and VPNs — what they each do and where they fit in a CCTV install.
• VLANs — the problem they solve, what a VLAN is, layout for security systems, and the practical setup most installers will use.

Wireless, bandwidth and storage

• Wi-Fi for security — when to use it, when not to.
• Wireless bridges between buildings; cellular for remote sites; and why a cable is usually still the right answer.
• Compression — H.264, H.265, bitrate.
• Per-camera bandwidth, total network bandwidth, and the storage calculation that follows.
• Surveillance-rated drives, RAID, NAS, and retention.

Practical hands-on skills

• Changing your computer's IP address quickly on Windows or macOS.
• Finding devices on a network you have just walked into.
• Logging into an IP camera for the first time.
• Setting up a PoE switch from scratch.
• Testing a network cable.
• Setting up secure remote access without leaving holes.

Cybersecurity

• Why hackers target security systems.
• Password discipline, firmware updates, network segmentation, encryption.
• How to hand a system over to a customer without it becoming a future liability.

Real systems and IT departments

• Small-system, medium-system and multi-building examples.
• The language to use when working with a corporate IT team so you stop being the bottleneck on a project.

Who this plan is for

• CCTV installers moving from analogue HD into IP work and seeing the network for the first time.
• Electricians taking on low-voltage and security work where the LAN is now part of the install.
• Security installers whose IT knowledge ends at "the router".
• Access-control installers, since modern access systems are IP-based and depend on the same skills.
• IT staff who suddenly own a CCTV deployment and need a structured grounding in how it interacts with the network they already manage.
• Site engineers and small integrators handling end-to-end commissioning.

What you will be able to do at the end

• Plan an IP CCTV LAN that actually works, including addressing, switch and PoE budget, and bandwidth headroom.
• Walk a customer's existing network and recognise the things that are about to break your install.
• Configure managed switches and VLANs to segregate CCTV from the corporate LAN.
• Diagnose IP, DHCP, port and PoE faults in a structured way instead of by trial and error.
• Set up secure remote access for a customer without leaving a path open to the internet.
• Talk to an IT department on equal terms — and walk out of the meeting with the access you needed.

Practical scope

The course is vendor-neutral. Demonstrations use real switches, routers and IP cameras. Where there are common Cisco-vs-Ubiquiti-vs-MikroTik differences, those are flagged but the underlying concepts are taught in a way that transfers between vendors.

One $69 payment, 14 days of full access, no subscription.