Compare Ethernet vs. WiFi

Ethernet vs WiFi
Ethernet vs WiFi

Wi-Fi hotspot services – by Wanderson S. Dantas

Ethernet cable 8pin modular jack endings – by Mozzerati

CCO 1.0/Universal Public Domain Dedication – CC BY-SA 3.0

Ethernet or WiFi?

It’s a dilemma worthy of Hamlet’s “To be, or not to be” soliloquy. Is WiFi a “consummation devoutly to be wished?” Does Ethernet “makes us rather bear those ills we have than fly to that we know not of?” Since Shakespeare isn’t around to answer these questions, the IAG “would these fardels bear” and “decide the native hue of Resolution.”

Internet users can opt for the speed and security of Ethernet or the convenience of WiFi. Sensible web bards will choose a combination of both.

Ethernet and WiFi Standards

Both Ethernet and WiFi standards are overseen by the Institute of Electrical and Electronics Engineers (IEEE). IAG readers by now are no doubt familiar with WiFi’s IEEE 802.11, introduced in 1999 and applicable to 2.4 GHz and 5 GHz. Ethernet technology is known as IEEE 802.3, covering dozens of standards for various applications.

The first standard“Experimental Ethernet”first appeared in 1973. Notable releases include 802.3i (10BASE-T; 10 Mbps over twisted pair) in 1990, 802.3ab (100BASE-T; Ethernet over twisted pair at 1 Gbps) in 1999 and 802.3af (Power over Ethernet-15.4W) in 2003. 802.3 standards for Ethernet over fiber optics and data lines (PoDL) exist as well.

Like VHS conquered Betamax, so Ethernet vanquished wired LAN technology competitors like Token Ring and ARCNET. Fast for its era16 MbpsToken Ring was championed by IBM in the early 1980s as a superior technology but after Ethernet switched from coax to twisted pair cabling, Token Ring was soon eclipsed.

We’ll punt the debate between deterministic networks (ARCNET) and non-deterministic networks (Ethernet) to academics.

Comparing Ethernet and WiFi Connectivity

Geezer Internet users (we know who we are) remember going online by plugging a cable into a single-line RJ11 jack (for dialup) or an RJ45 jack (for Ethernet) and firing up a desktop PC. While seasoned web warhorses consider laptops as the portable device of choice, many millennials regard them as passé, opting for the more flexible portability of smartphones or tablets to access the Internet.

Using mobile devices, of course, means wireless connectivity with either cellular or WiFi spectrum. Smartphones, tablets, wearables and some IoT devices such as lights and cameras aren’t built to accommodate wired connectivity.

Typically, conventional PC desktops connect to the Ethernet, although WiFi adapters are an option. Devices such as laptops and game consoles can have both wired and wireless options. Printers, once available only with USB or Ethernet ports, now have exclusively wireless models. Some products, thankfully, still have wired and wireless capabilities.

At the risk of belaboring the blinding obvious, going online with WiFi entails finding a wireless network in range and entering a network password. With Ethernet, one connects a cord between a device and a wall outlet with Ethernet wiring or a LAN port on a router.

Since many consider wireless connectivity as the raison d’être for using the Internet, they’ve eschewed Ethernet usage. But, as mentioned above, there are reasons for using both wired and wireless connectivity. We explain the pros and cons of both below.

First, let’s look at the following video produced by Irish telecom company eir on the differences between wired and WiFi connections:

Data Transfer Speeds

When 802.11g was the dominant WiFi standard circa 2003, Ethernet left WiFi speeds eating dust. WiFi topped out at 54 Mbps while Ethernet’s 802.3ab aka GbE, practically speaking, reached 900 Mbps speeds using Category (Cat) 5e and Cat 6 twisted pair Ethernet cable. (We’ll forego comparisons of Cats 3, 5, 6 and 7 cables for now.)

Later WiFi standards greatly improved data speeds. The most recent 802.11ax (Wi-Fi 6) release, depending upon channel width and modulation, can reasonably be expected to deliver 800 Mbps across a single data stream. Lab conditions have delivered 3.5 Gbps speeds per single data stream. Don’t expect that rate at home.

Ethernet standards, too, have evolved. The fastest available is 802.3aea blistering 10 Gbps (theoretically) and requires Cat 6-a or Cat 7 copper twisted pair or fiber optic cable. Another common Ethernet speed deployed besides GbE is “Fast Ethernet”802.3u or 100Base-T—at 100 Mbps.

Alas, many factors can degrade WiFi speeds while Ethernet data rates face far fewer obstacles. Ethernet’s main challenge is “noise,” anything extraneous to the actual signal. Outside interference can overwhelm the cable’s signal, unbalancing its electrical field. Normally, a cable’s twisted pair balances electrical signals. Electrical signal imbalance can greatly impede data speeds.

While this bugaboo affects WiFi as well—read: interference caused by microwaves—WiFi speeds also degrade when several active devices are connected to the same access point. Their signals “collide,” causing significant data transfer delays. It’s why many devices have migrated from 2.4 GHz to 5 GHz, which has less frequency congestion.

Too, distance and barriers such as walls and floors affect WiFi speeds. Ethernet speeds will remain virtually the same across the entire length of a cable (up to 100 meters/328 feet).

In short, Ethernet is still faster than WiFi.


While WiFi’s later releases (i.e., 802.11ac/ax) have greatly improved latency, it still doesn’t stack up to Ethernet. An insurmountable barrier affecting WiFi latency is that WiFi adds another protocol layer atop of Ethernet. Moreover, a wireless device’s latency is also affected as other devices join the WLAN, creating signal interference and degrading connectivity.

To illustrate, ran a ping test from a laptop to a router. On Ethernet, the Round Trip Time (RTT) was a constant 1 ms. With the same test using a 2.4 GHz connection over an 802.11n device, the reviewer observed latency delays of 13 ms, 5 ms, 13 ms and 25 ms across the same four data packets.

While this latency is probably less than your smartphone, it’s still problematic for dedicated gamers and could cause problems on video calls. But for people who mostly surf the web online, this level of latency causes no issues.

Nonetheless, there’s no doubt—Ethernet has considerably less latency than WiFi.

Data Encryption

IAG readers remember our plaints on WiFi security. Suffice to say that we highly recommend WiFi users, particularly when availing of hotspots, use a VPN while online. Data encryption with WiFi is more or less a necessity; black hats have numerous nefarious means in which to intercept and exploit data transmitted across radio waves.

While not entirely fail-safe, Ethernet data security is much simpler and more robust compared to WiFi. Remote attacks such as MITM are considerably more difficult over Ethernet (but not impossible) since data can only be intercepted by devices physically connected to the wired network.

Indeed, wireless network vulnerabilities are a persuasive argument against deploying IoT devices in smart homes. IoT botnets have been documented as a “constant presence” in DDoS attacks due to the ease at which IoT devices have been hijacked.

Verdict: Ethernet. When deciding between Ethernet or WiFi, security is a primary reason for choosing 802.3.


Of course, the convenience of WiFi connectivity is unsurpassed. The lack of a physical, wired connection allows users to freely move about as they talk or work on their mobile devices.

But there’s more to connectivity than just convenience and freedom of movement. Ethernet provides a much more stable and consistent connection by comparison to WiFi. As we explained above, Ethernet has overall superior signal quality, immune to 2.4 GHz or 5 GHz frequency saturation, and never needs beamforming (spatial filtering) or array signal processing to perform optimally.

Too, troubleshooting Ethernet connectivity is a snap, as simple as swapping out one cable for another. Troubleshooting WiFi connectivity can involve any number of steps before resolving network issues.

Still, let’s go with convenience and give the nod to WiFi for portability and flexible connectivity.

Installation and Deployment

On this front, there’s little doubt which technology has the edge. By its nature, WiFi needs no wired infrastructure other than (maybe) a connection between modem and router. Once a WLAN is in place, a mobile device searches for a network, recognizes it and connects.

Ethernet is not so simple. Unless one is willing to settle for low-speed (10 Mbps) Internet, the customary Cat 3 cable used in most home telephone wiring won’t support the advanced application. There are ways one can maximize data speeds using existing home phone wiring but with high-speed WiFi, why bother?

However, gamers may well object. If Junior complains that he absolutely must have an Ethernet connection in his bedroom for his ongoing Left 4 Dead 2 online tournaments, surely you can find a way to unobtrusively run a cable from the home’s router to his Xbox 360. Make sure Mom approves the cable run.

IoT and Smart Home Applications

In “Smart Homes: The Present and the Future,” IAG contributor Benmin Smith detailed the myriad of apps available for today’s hip tech homeowner. These include management tools for home energy usage, motion detectors, home theaters, surveillance cameras, security systems, access control, lighting and more.

Yet many if not most of these applications can be served by Ethernet connections and with greater network security. For instance, Power over Ethernet (PoE), transporting both data and electrical power, is ideal for surveillance cameras and access control (e.g., intercoms, keyless entry, etc) and often suited for lighting controllers and fixtures.

Too, media servers such as home theater PCs (HTPC) running platforms like Plex and MythTV are better served by Ethernet than WiFi, especially in homes with multiple devices devouring wireless bandwidth. The same holds for 4K UHD TVs. In truth, all wireless devices compete for existing bandwidth and as a result, performance suffersparticularly for devices that require a constant and consistent data stream.

While an 802.11ac router can (theoretically) serve up to 250 simultaneous connections, it’s also true that, for example, a WiFi router rated at 400 Mbps with 100 connected devices can only deliveron average4 Mbps to each. That won’t cut it with today’s data-gluttonous devices.

And, as mentioned above, IoT devices can pose serious internal and external network security risks if not properly secured. At the very least, this means changing the device’s default password and user name. As we recently suggested, use a more secure passcode with 16 randomly mixed-case alphanumeric and special characters.

Our take on IoT and Smarthomes? These devices and apps can be useful and convenient but one should exercise caution in deploying them. If PoE can serve an IoT device without remodeling the home or causing aesthetic conflicts, it should be strongly considered.

WiFi or Ethernet Summary Chart



Slower data transfer speeds

Faster data transfer speeds

Higher latency

Lower latency

Data encryption recommended

Data encryption not required

Inconsistent connectivity

Consistent connectivity

Simple installation and deployment

Requires Ethernet cable infrastructure

No physical connection; portable

Physical connection; limited portability

IoT and Smart home


IoT and Smart home

limited compatibility


As posited at the outset, sensible web bards will opt for a combination of Ethernet and WiFi in the home. In the words of Hamlet, Ethernet has “O, most wicked speed”; WiFi can “confound the ignorant, and amaze indeed the very faculties of eyes and ears.”

But it must be remembered that WiFi bandwidth is a finite resource, and too many horses at the trough will spoil the Internet experience for all. Use Ethernet when you can, and WiFi for convenience and where cables can’t reach.

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