A network connector is the hardware interface that joins two devices so data can pass between them. The main options fall into four buckets: copper RJ45 (8P8C) for Ethernet, fiber-optic connectors (LC, SC, ST, MPO) for high-speed links, coaxial connectors (BNC, F-type) for RF and video, and data connectors such as USB and HDMI.
Copper or fiber? An indoor patch cord, or a sealed run on an outdoor pole? Picking the right network connector sounds trivial until a link starts dropping packets in the rain. I have watched an outdoor camera network die after one wet season because someone crimped a standard indoor RJ45 plug where an IP-sealed connector belonged — the copper had corroded green inside the housing.
This guide walks through the main network connector types — the connectors used in a computer network — and a four-layer method for matching one to the environment you actually have.
What Is a Network Connector (and Why “RJ45” Is a Misnomer)?
A network connector terminates a length of cable and presents the mating interface that plugs into a device, a jack, or another cable. It is the physical handshake of the network: get it wrong and the cleanest cable run still fails.
The most common copper one is the so-called “RJ45.” Strictly, that name is incorrect. The interface is an 8P8C (8 position, 8 contact) modular connector standardized as IEC 60603-7, and it is wired to the T568A or T568B pinouts defined in the TIA-568 cabling standard. The “RJ45” label stuck from telephone-era registered jacks and refuses to die, but on a datasheet you will see 8P8C and an IEC 60603-7 reference. Knowing the real standard is the first defense against buying an under-spec part.
If you are still mapping out which connector families your build needs, the Verchil network connector category page groups the common interfaces so you can see the landscape before drilling into a specific part.
The Main Types of Network Connectors
Network connectors split into four practical families. The first three carry the network signal itself; the fourth covers the data and AV interfaces that increasingly share the same panels.
Copper / twisted-pair (RJ45 / 8P8C). The workhorse of Ethernet. The same IEC 60603-7 interface spans performance categories from Cat5e up to Cat8.1, with the cabling classes defined in ISO/IEC 11801. A Cat6A channel carries up to 10 Gbps over roughly 100 m, which covers most building networks. For the RJ45 connector on its own — wiring, uses, and female-to-female couplers — see the RJ45 connector guide.
Fiber-optic (LC, SC, ST, MPO). Used where distance, bandwidth, or electromagnetic immunity rule out copper. The LC connector — a small-form-factor 1.25 mm ferrule type standardized under IEC 61754-20 — dominates data-center and SFP/SFP+ ports. The older SC connector, with a 2.5 mm ferrule, is standardized under IEC 61754-4 and remains common in GPON and telecom. MPO/MTP (IEC 61754-7) bundles multiple fibers in one ferrule for high-density backbones. For rack and enclosure terminations, a LC panel-mount connector gives you a fixed, serviceable interface instead of a loose pigtail.
Coaxial (BNC, F-type). Still found in RF, broadcast, surveillance, and legacy segments where a single shielded conductor does the job.
Data and AV interfaces (USB, HDMI). Not “network” connectors in the strict LAN sense, but they live on the same equipment fronts and need the same rugged, panel-fixed treatment. A USB panel-mount connector or an HDMI panel-mount connector turns a fragile cable-end plug into a clean, bolted interface that survives field handling.
How to Choose a Network Connector: The Four-Layer Method
Most “types of network connectors” guides stop at the list. The harder question is which one fits your job. Work through four layers in order, because skipping one is where field failures start.
- Medium and signal. Copper, fiber, or coax? This is set by distance, required bandwidth, and electromagnetic noise — not by what is cheapest in the drawer.
- Interface standard and speed. Match the connector to the cabling category or fiber type you are actually running (Cat6A RJ45, LC duplex, and so on). The standard fixes the speed ceiling.
- Deployment environment and IP rating. Indoor patch field, or outdoor pole exposed to rain and dust? Ingress protection is graded by IEC 60529, where the first digit is dust and the second is water. This layer is the one most spec sheets quietly assume away.
- Termination and form factor. Cable-end plug, fixed panel-mount jack, or field-terminated link? The right form factor decides how easily a technician can install and service it later.
The table below collapses the scattered specs into one view so you can run the four layers at a glance:
| Connector type | Interface standard | Typical speed / reach | Best-fit environment & IP options | Verchil form factor |
|---|---|---|---|---|
| RJ45 / 8P8C (copper) | IEC 60603-7; TIA-568 | Up to 10 Gbps on Cat6A (~100 m) | Indoor by default; outdoor needs a sealed, IP-rated build | Waterproof RJ45 (IP65/67/68) |
| LC (fiber, duplex) | IEC 61754-20 | Multi-Gbps over long single/multi-mode runs | Racks, data centers; panel-mount in enclosures | LC panel-mount |
| SC (fiber) | IEC 61754-4 | Multi-Gbps; common in GPON/telecom | Telecom, data-center patching | Custom on request |
| USB (data) | USB-IF specs | Data + power; varies by version | Indoor; equipment front panels | USB panel-mount |
| HDMI (data / AV) | HDMI specification | AV / data signal | Indoor; equipment panels | HDMI panel-mount |
| Coaxial (BNC, F) | — | RF / video; legacy segments | Varies by application | Custom on request |
Once layers 1–3 point you toward a sealed outdoor build, the waterproof RJ45 network connector page lays out the sealed options against the parent category so you are comparing like for like.
Indoor vs Outdoor and Industrial Network Connectors (the “Indoor-Default Trap”)
The single most expensive mistake in connector selection is what I call the indoor-default trap: treating every network connector as if it lives in a climate-controlled rack. A standard RJ45 plug has no sealing. Put it outdoors and moisture finds the contacts, signal drops out, and corrosion finishes the job.
Ingress protection, graded under IEC 60529, is how you escape the trap. For outdoor Ethernet, industry guidance converges on IP67 as the practical minimum — dust-tight and protected against temporary immersion under defined test conditions. But a printed IP number is only a promise. It holds only when the connector is fully mated, the cable diameter matches the gland or seal, and any unused port is capped. An IP67 label on a connector whose gland is too large for your cable is meaningless.
This is the boundary where a general-purpose copper plug stops being the right answer. For an indoor patch field or a quick consumer crimp job, almost any compliant RJ45 or keystone jack will do, and there is no reason to overpay. Where it pays to be selective is outdoor, industrial, and panel-mount work that has to survive weather, vibration, and washdown — exactly the conditions covered by Verchil’s outdoor and communication-equipment connector solutions and industrial-automation connector solutions.
For those harsh-environment builds, the relevant trust signals are concrete and checkable: a vertically integrated factory (die-casting, CNC, plating, molding, and assembly under one roof), ISO 9001 quality management, CE/UL/RoHS compliance, IP65/67/68 sealing backed by third-party test reports, and five-stage QC traceable by lot number — the kind of company and quality background worth verifying before you commit a field network to it. OEM/ODM customization means the housing, sealing, and cable gland can be matched to your exact cable OD rather than forced to fit a generic part.
Conclusion
Choosing a network connector comes down to four ordered questions: which medium, which interface standard and speed, which environment and IP rating, and which termination form factor. Most online guides answer only the first two, which is why so many outdoor and industrial links fail at the connection point. If your build is a sealed outdoor or industrial run, or it needs panel-mount or custom-sealed parts, tell us the cable type, environment, and target IP rating and we will spec it for you — request a quote or RFQ here, or message the engineering team on WhatsApp for quick selection help.
FAQ
Is RJ45 a network connector?
Yes — it is the most common copper network connector, used to terminate Ethernet cables. Technically the name is a misnomer: the part is an 8P8C modular connector standardized as IEC 60603-7, but almost everyone in the field calls it RJ45.
How many types of network connectors are there?
They group into four practical families: copper RJ45/8P8C for Ethernet, fiber-optic connectors (LC, SC, ST, MPO), coaxial connectors (BNC, F-type), and data/AV interfaces such as USB and HDMI. Within each family there are many variants and performance categories.
Copper or fiber — which should I use?
Use copper RJ45 for short to medium runs (a Cat6A link reaches about 100 m) where cost and simplicity matter. Choose fiber for long distances, very high bandwidth, or where electromagnetic interference would degrade copper. The network connector category page compares both families side by side.
What IP rating do outdoor network connectors need?
For outdoor Ethernet, IP67 is widely treated as the practical minimum — dust-tight and protected against temporary immersion. Verify it holds for your setup: the connector must be fully mated, the seal must match your cable diameter, and unused ports should be capped. See the waterproof RJ45 options for sealed builds.
What is the difference between an RJ45 connector and a keystone jack?
They are different termination forms of the same 8P8C interface. An RJ45 plug is the male connector crimped onto a cable end; a keystone jack is a fixed female module that snaps into a wall plate or patch panel. Patch cords use plugs; permanent structured cabling usually terminates into keystone jacks.
What connectors are used in a computer network?
Four families cover almost every computer network: copper RJ45/8P8C for Ethernet, fiber-optic connectors (LC, SC, ST, MPO) for high-speed and long runs, coaxial connectors (BNC, F-type) for RF and legacy links, and data/AV interfaces such as USB and HDMI on equipment panels. Which one you use depends on speed, distance, and environment.
