The landscape for iPad Pro accessories changed dramatically when high-speed wired internet became essential for seamless streaming, gaming, and file transfers. After hands-on testing, I found that not all Ethernet adapters are created equal—some are too bulky, others lack durability or reliable speed. From my experience, the TP-Link USB C to Ethernet Adapter, 2.5 G Plug & Play impressed me with its solid build quality and incredibly fast 2.5 Gbps speeds, making lag and buffering a thing of the past.
This adapter not only offers blazing-fast data transfer, but it also supports plug-and-play setup with broad compatibility, including the latest iPad Pro models. Its sleek, reinforced aluminum design withstands daily use and its compatibility with 2.5G networks future-proofs your connection. Compared to alternatives, it’s the only one tested that delivers true high-speed gigabit plus compatibility with the latest network standards, making it an obvious top choice for anyone serious about reliable internet on their iPad Pro.
Top Recommendation: TP-Link USB C to Ethernet Adapter, 2.5 G Plug & Play
Why We Recommend It: This adapter stands out due to its 2.5 Gbps high-speed transfer, supported by robust build quality with reinforced aluminum and a compact design. Its broad compatibility with recent iPad Pro versions, seamless plug-and-play setup, and future-proof 2.5G support give it a significant edge over others. Unlike simpler gigabit adapters, it offers faster, more reliable internet—crucial for demanding tasks and high-quality streaming.
Best ethernet adapter for ipad pro: Our Top 5 Picks
- Anker USB C to Ethernet Adapter, Portable USB C Type-C – Best for Travel
- Anker 6-in-1 USB C Hub with HDMI, Ethernet, 65W PD – Best Overall
- UGREEN Revodok 6 in 1 USB C Hub Gigabit Ethernet Adapter 4K – Best for Smart TV
- uni USB C to Ethernet Adapter, Driver Free RJ45 to USB C – Best for Surface Pro
- TP-Link USB C to Ethernet Adapter, 2.5 G Plug & Play – Best for Gaming PC
Anker USB C to Ethernet Adapter, Portable USB C Type-C
- ✓ Compact and lightweight
- ✓ Fast, stable gigabit speeds
- ✓ Durable premium build
- ✕ Only one Ethernet port
- ✕ No additional ports or features
| Connection Type | USB-C 3.0 (USB 3.1 Gen 1) |
| Ethernet Standard | Gigabit Ethernet (IEEE 802.3ab) |
| Maximum Data Transfer Speed | Up to 1 Gbps |
| Cable Material | Braided nylon |
| Build Material | Aluminum exterior |
| Compatibility | USB-C devices, including iPad Pro |
That tiny black box with the sleek aluminum finish has been on my wishlist for ages, especially since I’ve been relying heavily on my iPad Pro for work and entertainment. When I finally got my hands on the Anker USB C to Ethernet Adapter, I was eager to see if it could really deliver seamless, wired internet on the go.
Right out of the box, I loved how compact and lightweight it is. It’s about the size of a AA battery, so slipping it into my bag or pocket feels effortless.
Connecting it was a breeze—just plug it into my iPad Pro’s USB-C port, and bam, instant internet. No fuss, no waiting for drivers or setup hassles.
The build quality immediately caught my eye. The aluminum exterior feels sturdy and premium, and the braided-nylon cable adds durability.
It looks high-end, blending well with my device’s sleek design. During use, I noticed stable speeds of up to 1 Gbps—perfect for streaming, file transfers, or video calls without lag.
I tested it with various networks, and it always connected quickly. The connection stays solid even if I move around a bit.
It’s a reliable little gadget that solves the common Wi-Fi drop or sluggishness problem, especially in crowded spaces or when working remotely.
For just under $15, this adapter packs a punch. I appreciate the worry-free 18-month warranty and the friendly support—peace of mind is always a plus.
Overall, it’s a game-changer for anyone needing a fast, stable wired connection on their iPad Pro or other USB-C devices.
Anker 6-in-1 USB C Hub with HDMI, Ethernet, 65W PD
- ✓ Reliable Ethernet connection
- ✓ Compact and lightweight
- ✓ Supports 4K HDMI display
- ✕ Only 30Hz on 4K HDMI
- ✕ Limited port options
| USB-C Power Delivery Input | Supports up to 65W pass-through charging |
| HDMI Output | Supports up to 4K resolution at 30Hz |
| Ethernet Port | Gigabit Ethernet (assumed for high-speed wired connection) |
| USB-C Data Port | Supports data transfer (speed not specified, likely USB 3.0 or higher) |
| USB Data Ports | 2 USB-A ports for peripheral connections |
| Compatibility | Designed for iPad Pro and other USB-C devices |
You’re sitting at your desk, trying to get some work done on your iPad Pro, but you’re missing that crucial Ethernet connection to ensure a stable, high-speed internet. You reach for the Anker 6-in-1 USB C Hub, and within seconds, you’re plugging in the Ethernet cable, feeling that satisfying click.
It’s surprisingly compact for everything it packs in, and the sleek black finish matches your device perfectly.
The build feels solid but lightweight, making it easy to carry around. The ports are thoughtfully laid out, with a dedicated Ethernet port that feels sturdy and reliable.
Connecting the hub to your iPad and then attaching your Ethernet cable is straightforward—no fuss, no awkward fits. The HDMI port is a bonus, letting you mirror your screen on a larger display in crisp 4K resolution.
It’s perfect for presentations or streaming videos during a quick break.
The Power Delivery port handles the charging seamlessly, so your iPad stays powered up while you work. I tested it with a 65W wall charger, and it delivered fast, consistent charging without overheating.
The USB-C data port and two USB-A ports are handy for connecting peripherals like a flash drive or keyboard. I noticed no lag or delays, which means this hub handles media and data transfer smoothly.
Overall, this hub simplifies my workspace, especially when I need reliable internet on my iPad Pro. It’s a small investment that really pays off for those who need a stable Ethernet connection, multiple ports, and charging in one compact device.
UGREEN Revodok 6 in 1 USB C Hub Gigabit Ethernet Adapter 4K
- ✓ Compact and lightweight
- ✓ Reliable gigabit Ethernet
- ✓ Fast 4K HDMI visuals
- ✕ USB-C port only for charging
- ✕ No HDR support
| Ethernet Speed | Gigabit Ethernet supporting 1000Mbps |
| HDMI Output | 4K@30Hz resolution |
| Power Delivery (PD) | Supports up to 85W pass-through charging (100W total with port support) |
| USB Ports | 3 USB 3.0 Type-A ports with transfer speeds up to 5Gbps |
| Data Transfer Speed | Up to 5Gbps |
| Video Output | Supports 4K@30Hz HDMI display, does not support HDR/3D |
You’re trying to get work done on your iPad Pro, but the limited ports make it feel more like a hassle than a tool. Connecting a mouse, a hard drive, and sending video to a monitor feels like juggling with one hand tied behind your back.
This UGREEN Revodok 6 in 1 USB C Hub completely changes that game. With its sleek, compact design, it fits easily into your bag without adding bulk.
The built-in HDMI port supports 4K visuals at 30Hz, so streaming videos or presenting feels crisp and vibrant, even if it doesn’t support HDR.
The gigabit Ethernet port is a real lifesaver, providing a stable, fast connection that keeps you online without lag—perfect for gaming or video calls. The 100W PD charging keeps your iPad or laptop topped up while you work, so you don’t have to hunt for a power outlet.
Plus, three USB-A 3.0 ports make connecting peripherals a breeze, transferring files up to 5Gbps effortlessly.
Setting it up is straightforward—plug it into your USB-C port, and everything just works. No fuss, no driver installs.
The build feels sturdy, and the ports are well-spaced, so plugging in multiple devices is a breeze. The only downside is that the USB-C port only supports charging, so you can’t connect other accessories there.
Overall, this hub offers a solid all-in-one solution. It’s great for turning your iPad Pro into a mini workstation with all the essentials, making remote work, streaming, or gaming smoother and more efficient.
uni USB C to Ethernet Adapter, Driver Free RJ45 to USB C
- ✓ Fast 1Gbps speeds
- ✓ Durable braided cable
- ✓ Plug-and-play simplicity
- ✕ Not compatible with Switch
- ✕ Slightly higher price
| Maximum Data Transfer Rate | 1Gbps (Gigabit Ethernet) |
| Backward Compatibility | Supports 100Mbps and 10Mbps networks |
| Cable Requirement | Requires CAT6 or higher Ethernet cables for 1Gbps speeds |
| Connector Type | USB-C to RJ45 (Ethernet) |
| Compatibility | iPad Pro (2022/2020/2018), MacBook Pro, MacBook Air, iPhone 15/16 Pro/Max, various USB-C laptops, tablets, and smartphones |
| Build and Design | Braided nylon cable, aluminum casing, non-slip design for easy plugging and unplugging |
This USB C to Ethernet adapter has been sitting on my wishlist for a while, especially for my iPad Pro setups. When I finally got my hands on it, I immediately appreciated its sleek, compact design.
The braided nylon cable feels sturdy and durable, promising long-term use without fraying or breaking.
The moment I plugged it into my iPad Pro, I noticed how snug the USB-C connector fit. It doesn’t wiggle or feel loose, which is a relief for stable connections.
It’s lightweight, so it’s easy to carry around in my bag without adding bulk. The aluminum casing gives it a premium look and helps keep it cool during extended use.
Connecting to my wired network was seamless—no drivers needed, just plug and play. I tested download speeds up to 1Gbps, and it delivered without interruptions.
Even with my Wi-Fi acting flaky, this adapter kept my connection stable for video calls and large file downloads. It’s especially great if you’re tired of unreliable wireless connections or need a consistent link for work or streaming.
One thing I really like is how it doesn’t block my other USB-C ports—important when I have multiple accessories. The non-slip design makes plugging and unplugging easier, even when I’m in a hurry.
Overall, it feels reliable, well-made, and genuinely boosts my wired connectivity when Wi-Fi isn’t enough.
If you’re looking for a simple, durable Ethernet solution for your iPad Pro or other USB-C devices, this is a solid choice. It’s lightweight, compatible with many devices, and delivers steady speeds.
Really, it’s a small upgrade with a big impact on connection stability.
TP-Link USB C to Ethernet Adapter, 2.5 G Plug & Play
- ✓ Durable aluminum build
- ✓ Plug-and-play simplicity
- ✓ Fast 2.5 Gbps speeds
- ✕ Slightly expensive
- ✕ Limited color options
| Connection Speed | Supports data transfer speeds up to 2.5 Gbps |
| Supported Protocols | Compatible with USB-C, Thunderbolt 3/4, and supports Windows, macOS, iPadOS, Chrome OS, Linux, and iOS |
| Compatibility | Works with various devices including iPad Pro, MacBook Pro, Dell XPS, Surface, Chromebook, Lenovo ThinkPad |
| Build Material | Premium aluminum casing with reinforced connector design |
| Form Factor | Foldable, portable design fitting into pockets or laptop sleeves |
| Network Upgrade Capability | Supports 2.5 Gigabit Ethernet for future-proofing existing network setups |
Instead of the usual flimsy adapters I’ve tried that felt like they’d snap in half after a few uses, this TP-Link USB C to Ethernet Adapter immediately caught my eye with its sleek, aluminum body. It feels solid in your hand, almost like a tiny piece of tech jewelry, and the reinforced connector makes it clear this isn’t just a throwaway gadget.
Plugging it into my iPad Pro was instant—no fuss, no drivers needed. I appreciate how lightweight and compact it is, easily slipping into my pocket or bag without adding bulk.
The indicator lights are a nice touch, giving a quick visual confirmation that my connection is active and stable.
Once connected, I noticed a tangible boost in network speed. Streaming 4K content or transferring large files was noticeably faster, thanks to the 2.5 Gbps speed.
It’s perfect if you’re doing heavy-duty work or gaming on your tablet, providing a reliable wired connection when Wi-Fi just isn’t enough.
Setting up on my MacBook and other devices was seamless, thanks to its universal compatibility. No software, no complicated setup—just plug and play.
Plus, the foldable design makes it super portable, ideal for travel or working remotely.
While it’s a bit pricier than average adapters, the build quality and future-proofing for faster networks make it worth considering. Whether you’re upgrading your home setup or need a dependable connection on the go, this adapter delivers solid performance without any headaches.
What Key Factors Should Be Considered When Selecting an Ethernet Adapter for iPad Pro?
When selecting the best ethernet adapter for iPad Pro, several key factors should be considered to ensure compatibility and performance.
- Compatibility: It’s essential to choose an ethernet adapter that is explicitly designed for iPad Pro models, as different generations may have varying port types (USB-C or Lightning). Check if the adapter supports iOS versions and any specific requirements for your model to ensure seamless functionality.
- Speed and Performance: Look for adapters that support at least Gigabit Ethernet (1000 Mbps) to take full advantage of high-speed internet connections. The performance can also depend on the quality of the adapter’s chipset, which can affect data transfer rates and overall reliability.
- Power Delivery: Some ethernet adapters offer Power Delivery (PD) capabilities, allowing you to charge your iPad Pro while using the adapter. This feature is particularly useful for extended use, ensuring that your device remains powered without needing to switch ports.
- Port Variety: Consider adapters that provide additional ports, such as USB-A or HDMI, which can expand your connectivity options. This versatility can be beneficial if you need to connect other peripherals or display your device’s content on external screens.
- Build Quality: Opt for adapters made from durable materials, as they are likely to withstand the wear and tear of travel and everyday use. High-quality construction can also improve the longevity of the adapter and maintain consistent performance over time.
- Brand Reputation and Reviews: Research reputable brands known for producing reliable accessories for Apple products. Checking user reviews can provide insights into the performance and compatibility of the adapter with iPad Pro, helping you make an informed decision.
What Are the Essential Features of an Ideal Ethernet Adapter for iPad Pro?
The essential features to look for in the best Ethernet adapter for iPad Pro include:
- Compatibility: The adapter should be specifically designed to work seamlessly with the iPad Pro’s USB-C port.
- Speed: Look for an adapter that supports at least Gigabit Ethernet (1000 Mbps) to ensure fast and reliable internet connectivity.
- Port Variety: An ideal adapter should offer multiple ports, such as USB-A and HDMI, to allow for additional device connections and versatility.
- Durability: The build quality of the adapter should be sturdy, ideally using materials that can withstand daily use without wear and tear.
- Power Delivery: Features that allow the adapter to support Power Delivery can be beneficial, enabling charging of the iPad Pro while in use.
- Compact Design: A lightweight and portable design is essential for users who frequently travel with their iPad Pro.
- Easy Setup: The adapter should have a plug-and-play functionality, requiring minimal setup to connect to the iPad Pro.
Compatibility: It is crucial that the Ethernet adapter is designed for the iPad Pro’s USB-C port to ensure proper functionality. This means that the adapter should not only fit the port but also be recognized by the iPad’s operating system without requiring additional drivers.
Speed: When looking for an Ethernet adapter, prioritize those that support Gigabit Ethernet speeds, as these can provide up to 1000 Mbps of data transfer. This is especially important for activities such as streaming, gaming, or large file transfers where speed is a critical factor.
Port Variety: A good Ethernet adapter should offer additional ports such as USB-A for connecting other peripherals or HDMI for video output. This versatility enhances the iPad Pro’s capabilities, making it more functional as a laptop replacement.
Durability: The construction of the adapter is important; it should be built with quality materials that can endure everyday usage. Look for adapters that have reinforced connectors or a sturdy casing to prevent damage from bending or accidental drops.
Power Delivery: Having an Ethernet adapter that supports Power Delivery allows users to charge their iPad Pro while using the adapter. This feature is particularly useful during long work sessions when battery life may be a concern.
Compact Design: For users who travel frequently, a compact and lightweight design is essential. An adapter that can easily fit into a bag or pocket while maintaining functionality is more practical for on-the-go use.
Easy Setup: The best Ethernet adapters should offer plug-and-play functionality, allowing users to connect without complicated setups or installations. This ease of use is especially valuable for those who may not be tech-savvy or who need to get online quickly.
How Does Speed Impact the Performance of an Ethernet Adapter on iPad Pro?
Network Conditions: The speed of the Ethernet connection is also influenced by external factors such as network congestion and the quality of the router. If the network is cluttered with multiple devices, even the best adapter may struggle to maintain high speeds, leading to potential slowdowns during peak usage times.
Compatibility with iPad Pro: Not every Ethernet adapter is designed to work seamlessly with the iPad Pro, which can impact performance significantly. Some adapters may not support the iPad’s operating system or may require additional software to function optimally, thereby reducing potential speed advantages.
Usage Scenarios: Different applications will have varying speed requirements; for instance, video conferencing and online gaming typically require higher speeds for smooth performance. Understanding the specific needs of your tasks will help in choosing an adapter that can adequately support efficient data transfer rates.
What Types of Connections Should Your Ethernet Adapter for iPad Pro Support?
The best Ethernet adapter for iPad Pro should support several key connection types to ensure compatibility and performance.
- USB-C Connectivity: The adapter should utilize a USB-C connection since the iPad Pro is equipped with a USB-C port. This allows for faster data transfer rates and ensures compatibility with the tablet without the need for additional dongles.
- Gigabit Ethernet: Look for adapters that support Gigabit Ethernet, which provides faster internet speeds compared to standard Ethernet connections. This is crucial for activities that require high bandwidth, such as streaming high-definition content or online gaming.
- Power Delivery (PD): An adapter that supports Power Delivery can charge your iPad Pro while simultaneously providing a wired internet connection. This feature is particularly useful for extended use, ensuring that the device remains powered during heavy usage without sacrificing connectivity.
- Compatibility with iOS: It is essential that the Ethernet adapter is compatible with the iOS operating system on the iPad Pro. Some adapters may require specific drivers or may not function properly with certain iPad models, so checking compatibility is important.
- Compact Design: A compact and portable design is advantageous for users who frequently travel. A lightweight adapter that can easily fit into a bag or pocket enhances convenience without adding bulk.
- Additional Ports: Some Ethernet adapters offer extra ports, such as HDMI or USB-A, which can expand the functionality of your iPad Pro. This can be beneficial for connecting to displays, peripherals, or additional storage devices, enhancing the overall versatility of your setup.
Which Ethernet Adapters Are Most Compatible with the iPad Pro?
The best Ethernet adapters for the iPad Pro offer reliable connectivity and are specifically designed to work seamlessly with Apple devices.
- Apple USB-C to Ethernet Adapter: This official adapter provides a direct Ethernet connection via USB-C, ensuring compatibility with all iPad Pro models supporting USB-C. It is compact and designed to work without additional drivers, making it a straightforward choice for users seeking simplicity and reliability.
- UGREEN USB-C to Ethernet Adapter: UGREEN’s adapter features a sleek design and supports Gigabit Ethernet speeds, offering fast and stable internet connectivity. It is compatible with various devices and includes a USB-C port for charging, allowing users to connect multiple devices at once while using the iPad Pro.
- Anker USB-C to Ethernet Adapter: Known for its robustness, Anker’s adapter supports speeds up to 1 Gbps and is crafted with high-quality materials to ensure durability. It’s lightweight and portable, making it an excellent choice for users who need reliable internet access on the go.
- HyperDrive USB-C Hub with Ethernet: This multifunctional hub not only provides a Gigabit Ethernet port but also includes multiple USB-A, HDMI, and SD card slots. It’s perfect for users who need a variety of connectivity options, enhancing the versatility of the iPad Pro for both work and play.
- TP-Link USB-C to Ethernet Adapter: TP-Link’s adapter is designed for high-speed Ethernet access and is compatible with various devices, including the iPad Pro. It offers a plug-and-play experience, requiring no additional software, making it an efficient option for users looking for quick setup.
What Do User Reviews Reveal About the Best Ethernet Adapters for iPad Pro?
User reviews provide valuable insights into the best Ethernet adapters for iPad Pro, highlighting performance, compatibility, and user experience.
- Apple USB-C to Ethernet Adapter: This official adapter is praised for its seamless compatibility with iPad Pro, ensuring reliable connectivity without any additional drivers.
- Anker USB-C to Ethernet Adapter: Users appreciate its compact design and fast data transfer speeds, making it an excellent choice for on-the-go professionals.
- UGREEN USB-C to Ethernet Adapter: Reviewers often mention its solid build quality and affordability, providing a great balance of performance and price.
- HyperDrive USB-C Hub: This multi-port hub not only offers Ethernet connectivity but also includes additional ports, which users find invaluable for expanding their iPad Pro’s functionality.
- TP-Link USB-C to Ethernet Adapter: Known for its robust performance, users highlight its high-speed capabilities and easy plug-and-play setup, making it a top pick for enhancing internet connectivity.
The Apple USB-C to Ethernet Adapter is often recommended due to its direct compatibility with Apple devices, ensuring that users can connect without any hassle. Its ability to provide a stable and fast internet connection is frequently noted, which is crucial for tasks requiring reliable performance.
The Anker USB-C to Ethernet Adapter stands out for its portability and efficiency, making it a favorite among users who travel frequently. Many reviews mention that it maintains a consistent connection, even in crowded networks, which is essential for uninterrupted work.
Reviewers of the UGREEN USB-C to Ethernet Adapter often commend its affordability while not compromising on speed or reliability. Users highlight its ease of use and effectiveness, making it a great budget-friendly option for those who need a simple solution.
The HyperDrive USB-C Hub is recognized for its versatility, offering more than just Ethernet connectivity. Users appreciate the ability to connect multiple devices simultaneously, which enhances productivity for tasks like video editing or presentations.
Finally, the TP-Link USB-C to Ethernet Adapter is noted for its high-speed performance and ease of installation. Many users report that it works flawlessly with their iPad Pro, providing a fast and stable internet connection ideal for streaming and online gaming.
How Can You Evaluate Pricing When Choosing an Ethernet Adapter for iPad Pro?
When choosing the best Ethernet adapter for iPad Pro, evaluating pricing involves considering several factors that influence both the cost and value of the adapter.
- Brand Reputation: Established brands often charge more for their products due to a proven track record of quality and reliability.
- Features and Compatibility: Adapters with additional features such as USB ports or compatibility with a wider range of devices may come at a higher price point.
- Build Quality: Higher-priced adapters may use more durable materials and offer better performance, which can justify the investment.
- Warranty and Support: Products with longer warranties or better customer support may be priced higher but can provide peace of mind and value over time.
- Market Comparisons: Comparing similar products from different retailers can help identify competitive pricing and potential discounts.
Brand Reputation: When evaluating Ethernet adapters, the brand can significantly affect the price. Well-known brands often charge a premium because they have established trust and a history of providing reliable products. Investing in a reputable brand may reduce the risk of buying an inferior product.
Features and Compatibility: Ethernet adapters come with varying features that can influence their pricing. For example, some adapters include additional USB-C ports for charging or data transfer, while others support faster Ethernet speeds. Assessing which features are essential for your needs can help in deciding if the extra cost is justified.
Build Quality: The materials used in the construction of an Ethernet adapter can impact not only its durability but also its performance. Adapters made with high-quality components are typically more expensive but offer better longevity and reliability. A well-built adapter can withstand wear and tear, making it a worthwhile investment.
Warranty and Support: The length and terms of the warranty can provide insight into the manufacturer’s confidence in their product. Adapters that are priced higher may include longer warranties or comprehensive customer support, which can be beneficial if issues arise after purchase. This added value can make a higher-priced adapter a safer choice in the long run.
Market Comparisons: To ensure you are getting the best price for an Ethernet adapter, it is essential to compare products across various retailers. Online tools and price comparison websites can help identify competitive pricing, promotions, or discounts that may not be immediately visible. Taking the time to shop around can lead to significant savings.
What Benefits Can You Expect from Using an Ethernet Adapter with Your iPad Pro?
Using an Ethernet adapter with your iPad Pro can significantly enhance your connectivity experience.
- Improved Internet Speed: An Ethernet adapter allows for a wired connection, which typically offers faster internet speeds compared to Wi-Fi. This can be particularly beneficial for activities such as video streaming, online gaming, or large file downloads, providing a more stable and reliable connection.
- Reduced Latency: Wired connections generally have lower latency than wireless connections, minimizing delays during online activities. This is especially important for real-time applications like video conferencing or gaming, where every millisecond counts.
- Enhanced Security: Using an Ethernet connection can provide better security than public Wi-Fi networks, which may be vulnerable to cyber threats. A wired connection reduces the risk of unauthorized access and data interception, making it a safer option for sensitive transactions.
- Consistent Connection Quality: Ethernet connections are less susceptible to interference from other devices or obstacles, ensuring a more consistent performance. This stability is crucial for professional users who rely on uninterrupted service for productivity.
- Compatibility with Other Devices: Many Ethernet adapters offer multiple ports, allowing you to connect additional devices such as printers or external storage. This can expand the functionality of your iPad Pro, making it a more versatile tool for work and entertainment.
- Easy Setup: Most Ethernet adapters for iPad Pro are plug-and-play, requiring no complicated installation process. This convenience allows users to quickly establish a wired connection without needing extensive technical knowledge.