Extension on Chrome browser allows users to install support utilities. With different functions, these applications help users to have a better experience. And also stimulate the creativity of developers.

However, the opposite of the benefits it brings. There are also many extensions that make your browser sluggish because it has to process a lot of data. The trick will help you restricted activities of extensions. By just for the Extension to work on some websites pre-installed.

How to install Extension that only works on some websites

Firstlyyou open the extension manager by clicking the 3 dots on the upper right of Chrome => Công cụ khác => Tiện ích mở rộng. Or can access directly here.

Step 2: Here, you select the utility to install and click detail.

Step 3: In section Permissionyou choose to access On specific websites.

Step 4: Enter the website address and press More.

In addition, you also have the choice of On Click. With this mode, extensions won’t work until you tap on their icon. This is a pretty cool option that will help you use the utilities you rarely use but don’t want to delete them.

Summary of the article

Thus, AnonyViet has shown you how to install the extension’s access rights on Chrome browser. As a result, you can use the browser more efficiently. However, in order for your computer to work smoothly without lag when using the browser. Then delete all unused extensions to free up space and resources they take away to free up space and resources. stay active.

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Hi! Hello friends! Today’s article I will introduce an overview of the interface and how it works Godot Engine. This is also one of the articles in the series The Ultimate Guide to Godot Engine. Follow along with the article!

CHAPTER I: GODOT ENGINE BASIC

INTERFACE & HOW IT WORKS

Overview of the interface and how it works on Godot Engine.

Interface overview

How it works:

Godot works on objects (Objects/Classes) and multiple objects composing contexts (Scenes).

So what is an object? There are many concepts of an object, we can roughly understand it as a tangible or intangible existence. Each different object has different properties and characteristics.

Example: A ball is an object with the characteristic ROUND and the ability to roll on a plane. The roundness of the ball can be called properties, while the ability to roll is called the method.

Another example is the cat:

Cat (Class)
Properties	Method (method)
Name: Meow Category: Tabby cats Gender: Male	Walk(3000 steps) Run(5000 km) Sleep(10,000 years) Eat) Scratch()

Syntax for calling properties and methods:

<class_name> . <properties name> // call the property (variable). Ex: Cat.Name, Cat.Gender

<class_name> . <method name[parameters]> // call the method (function). Ex: Cat.Scratch(), Cat.Eat(rice), Cat.Go(3000 steps)

Note: “Object can be called Class”

Context is also an object

A scene can contain many objects and other contexts. Eg:

Scene 1:

Scene 2:

Vegetable bed

Cilantro Laksa leaves Weed

Scene 3:

Back garden

Fish Dress (Scene 1) Vegetable bed (Scene 2) Chicken Duck

– Objects in Godot are called nodes (Node)

– White Node (Node) to indicate invisible objects

– Blue Node (Node2D) to indicate 2D . objects

– Red node (Spatial) to indicate 3D objects

– Green node (Control) to indicate the objects that make up the game interface (GUI)

– Purple node to indicate control objects

Tree Structure in Godot (Tree Graph)

– Nodes in Godot are linked together in the form of a graph tree (Scene Tree)

– Node has 3 basic properties: Name (name), Type and ID

– Graph tree structure:

CREATE AND ACCESS NODE

By Clicking Create New Node. You can create many Nodes with different Type and rename Node according to your purpose.

• Node access & interaction through script

– Sequential access:

– If a parent node has many children, the sequence of child nodes is numbered from 0 to n-1 .

– You can sequentially access other Nodes from child Nodes with 3 functions

+ get_parent() // call to the parent Node

+ get_child(index) // call down the child node

+ get_children()[index] // call down the sub-Node array

_ get_tree().get_root() // call up Node Root

+ Keyword self to call the Node itself

– For example from Node I want to access the parent Node and print out the father’s name, then call get_parent().name

– For example from Node I want to access the Cousin Node and print my Cousin name, then call get_parent().get_parent().get_child(1).get_child(0).name

• Access by path by keyword get_node(“Node path”) or $”Node path”

– Eg get_node("/root/OngNoi/Cha/Toi").name // print the name of My Node or $”/root/OngNoi/Cha/Toi”.name

– get_node(".") = self

Today’s article I introduced and shared with you the basic interface & operation of Node on Godot Engine. If you have any questions, feel free to leave comments and suggestions! For more information, you can refer to the basic videos at https://www.youtube.com/playlist?list=PLOk8LhtEwUVn8e3RUfk-rX_RB3f9_ulYg. Thank you for following this post! 🙂

Apple’s newest technology is AirTag. The company announced this product in April 2021 after much waiting and expectation from users. Apple AirTags are small tracking devices that you can attach to your belongings like keys, umbrellas, backpacks, or attach to your bike. As the name suggests, AirTag helps you find your items if lost somewhere.

If you are considering deciding to buy an AirTag and make your life easier. Here are answers to questions about AirTag you need to know:

How does AirTag work?

AirTag was created based on the lines of Tile, another popular tracking device. These Apple trackers use Bluetooth LE (Low Energy) technology to show themselves to iPhones and other nearby Apple devices.

AirTag is powered by Apple’s U1 chip, which makes it easier to use by enabling a feature called Exact search. The U1 chip improves tracking accuracy for AirTag when trying to find items in close proximity to your phone. You can get step-by-step directions on your iPhone along with the distance when you try to find a lost object.

What makes AirTag more special than other types?

There are two things sets AirTags apart from Tile and other Bluetooth tags. Firstly is the Ultra Wide Band (UWB) chip we discussed above. Monday which many of us don’t realize is a feature Find My iPhone – Find My iPhone.

There are more than a billion Apple devices, including iPhones, iPads, and Macs in use worldwide. All these devices, when lost, can be traced through Find My iPhone.

Now, for example, if you left my backpack on the busthe Bluetooth signal from your AirTag will be picked up by a nearby iPhone, which then downloads the recorded location data. update to iCloud anonymously and relay that signal back to your iPhone. All of this is completely automated, with no iPhone or iPad user intervention required around the Airtag.

Therefore, AirTag is not limited by Bluetooth LE technology that only works up to a few meters, but can also take advantage of the Internet via the feature. Find My iPhone.

How many meters does AirTag find objects?

If using Bluetooth and UWB, the AirTag range is approx 9m to 12m depending on the line of sight. But use the feature Airtag connect Find My iPhone then that range is almost unlimited.

For other types of Tiles, the long-distance tracking feature works through Smartphones with each company’s own Tile application installed. In the case of Apple, the feature Find My iPhone comes pre-installed on Apple devices, and all content works in the background, giving AirTag an edge.

How long does the Apple AirTag battery last?

The AirTag is equipped with a CR2032 coin cell battery that you can easily replace by opening the back cover. Interestingly, the AirTag is the only Apple product with a removable battery.

In terms of battery life, the coin cell battery should be able to keep the AirTag running for about a year, according to Apple. You can check the application Battery life Find My iPhone to know the remaining Battery. However, no exact Battery percentage is reported.

What devices does AirTag support?

Devices that support Apple AirTag include iPhones and iPads running iOS 14.5 and iPadOS 14.5. But the difference here is that iPhones equipped with the U1 chip will be able to provide a more precise search direction.

AirTag-enabled iPhones with U1 chip

• iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max
• iPhone 12 mini, iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max

AirTag supports older iPhones without the U1 chip

• iPhone XR, iPhone XS, iPhone X, iPhone XS Max
• iPhone SE second generation
• iPhone 8, iPhone 8 Plus
• iPhone 7, iPhone 7 Plus
• iPhone 6, iPhone 6 Plus
• iPhone SE first generation

On older iPhones, you can’t use the feature Exact search. But you can tap Sound button to make the AirTag beep and make it easier to find.

AirTag supported iPad models (iPadOS 14.5)

• iPad mini 4, iPad mini (5th Generation)
• iPad 5th generation to iPad 8th generation
• iPad Air 2, iPad Air (3rd generation), iPad Air (4th generation)
• iPad Pro 9.7 inch, iPad Pro 10.5″
• iPad Pro 11-inch (1st and 2nd Generation)
• iPad Pro 12.9-inch (1st to 4th generation)

Can I use airtag to follow others?

Yes of course. With its compact size, the battery lasts all year, connects itself and sends a signal when an Apple device is nearby. A bad guy can drop your AirTag and backpack to track your location, however this is illegal.

But Apple has thought about this in advance and implemented a fail-safe method. If your iPhone detects that an unknown AirTag is tracking you, it will put up a notification on your screen. You can then find that AirTag and disable it by removing the battery.

AirTag lost, can someone else use it?

No. If your AirTag is lost somewhere and someone else is holding your AirTag, they have 2 options: return it or make a paperweight.

When you set up your AirTag, it’s tied to your Apple ID. No one can use it unless you factory reset the AirTag.

Does Apple AirTag work with Android?

No, but there’s a chance. If you have an NFC-enabled Android device and you find an AirTag somewhere, you can tap your Android device with the Airtag. The AirTag owner’s contact information will then show up on the phone.

You cannot use an Android device to set up a new AirTag or edit settings.

What is the price of AirTag?

Currently, Apple is selling a single AirTag for $29 and a set of four for $99. You should choose Pack of 4 which is more profitable if you want to buy AirTag for your family, save 17$. As with other Apple products, you can get your name engraved for free when you purchase an AirTag from Apple, helping you to distinguish AirTags from one another.

However, you need to buy an additional strap for the AirTag to be able to hang the Airtag on your objects, priced at about $ 35. If in Vietnam, buy on Shopee for about 150k.

A virtual private network or VPN is an encrypted connection that protects your internet connection and your privacy online. It does so by creating an encrypted tunnel and then transmitting your data. While using a VPN service, it will hide your real IP address and keep you safe on public networks.

Typically, VPN technology is used to establish a private network over the internet to share the resources of the corporate intranet with remote users and other corporate locations. People can also use a VPN to access their home network remotely.

A VPN is like your own private lounge on the Internet, where you can hang out without anyone taking a seat :v. They allow access to your home network or your company’s corporate network even when you are in another part of the world.

Popular VPN Service

NordVPN and Private Internet Access, all of these VPNs are popular in QoS and security, providing private connections.

Cyber ​​Ghost, Surf Easy, Tunnel Bear are some of the free VPN services you can use if you want to save money. But because it’s free, there will be little features, download limits or ads. Also, these free services can’t beat the paid ones.

How does a VPN work?

However, the working principle of Virtual Priavate Network (VPN) is not a complicated matter. You need to understand the following concepts:

SSL (Secure Sockets Layer) / TLS (Transport Layer Security): It uses 3-way handshake to ensure proper authentication between client and server. A cryptographic-based authentication process in which certificates, which act as cryptographic keys that have been stored on the client and server side, are used to connect.

IPSec (IP Security): This protocol can operate in transport mode or tunnel mode so that it can do the job of securing Virtual Network connection. The two modes differ in that the transport mode only encodes the payload in the data, i.e. only the message is present in the data. On the other hand, tunnel mode encrypts all transmitted data.

PPTP (Point-To-Point Transfer Protocol): It connects users in some remote location to a private server in the VPN network and also uses tunnel mode for its operations. Low maintenance and simple working make PPTP a widely accepted VPN protocol.

L2TP (Layer Two Tunnelling Protocol): It facilitates the transmission of data between two geographical locations over a VPN network, often used in combination with the IPSec protocol, further supporting the security layer of the communication.

You now have a rough understanding of the different protocols used in VPNs. We’ll find out how they work. When you connect to a public network, such as the free WiFi network at airports, all your data is flowing through a large tunnel along with the data of other users.

Anyone who wants to spy on you can easily sniff your data packets in the network. When a VPN comes along, it gives you a secret tunnel inside that big tunnel. In other words, all your data will be encrypted so that no one can exploit it.

Why do you need a VPN service?

Surfing the web or making Online payments on an unsecured network means that your personal information may be exposed. Therefore, to be safe, a VPN should be a must for everyone who wants to keep their information secure.

For example, if you are in a public place and use WiFi, you risk exposing your sensitive information while surfing the internet. Users on the same network can access any data transmitted over that network.

By using a VPN, your data is always encrypted and anonymous.

How a VPN Protects You Online

As explained above, a VPN encrypts your data so that you can stay anonymous from any trackers or eavesdroppers while connecting to the Internet. By using a VPN, no one can access what you do on public and home networks.

Encryption is the best way to stay anonymous on the Internet, and data security is also a big concern.

Setting up a VPN connection involves three stages

Accuracy: In this step, the first data packets will be encapsulated, basically the data is wrapped inside another packet along with some headers and other things attached. Doing so is to conceal the identity of the data packets. Now, your device initiates the connection by sending a Hello request to the VPN server, which will respond with confirmation and request credentials to verify the user’s authenticity.

Tunnel: After the authentication phase is complete, a tunnel is created to provide a direct connection through the internet. We can send any data we want through that tunnel.

Encode: After successfully creating the tunnel, it can transfer any information we want, but that information is still not safe if we use a free VPN service. That’s because other people use it too. So, we encrypt data packets before sending them through the tunnel, thus preventing any other users from peeking into those data packets. They will only see some unrecognizable junk data passing through the tunnel.

Now, if you want to access a website, your device will send an access request to the VPN server, which will then forward the request to the website using the VPN’s identity and receive the data as well. so. The VPN then transmits this data to your device. Here, the website will think that the VPN server is the user. It will not find your trace or device as a real user unless you transmit some personal information over the connection. For example, your identity will be revealed if you visit a social networking site like Facebook or Twitter using a VPN connection.

Uses of VPN: What is the function of a VPN?

A VPN connection provides direct access to the corporate network for users who are not within the physical coverage of the network. Logically, the remote user is connected like a regular user sitting in the company.

It is also used to provide a uniform network environment for an enterprise company with office locations around the world.

Other uses of a VPN include accessing services on the internet that are not available in a particular country or region, accessing censored content, or if the user simply wants to remain anonymous on the web.

VPN on Android and iOS

You can also set up a VPN connection on your Android phone. It allows you to access your company’s private network right on your Android device. A VPN also allows network administrators to control your device, add or remove data, and monitor your usage.

Likewise, Apple devices including iPhone (iOS) and iPad (iPadOS) have built-in support for VPN. You can go to the Settings app and create a new VPN profile using the credentials provided by the VPN.

Types of VPNs

There are basically two types of VPNs, namely Remote Access Virtual Network and Site-to-Site VPN. The second type, site-to-site VPN, comes in many more varieties.

VPN Remote Access (VPN Remote Access)

This VPN will give someone access to an existing private network over the internet. A private network can be a network set up by several corporate organizations equipped with databases and networking hardware related to the organization or any of their projects.

There’s a remote access VPN, so employees don’t need to connect directly to the company’s network. They can do so with the help of the necessary VPN software and authentication data provided by the company.

Remote access VPNs aren’t just for the corporate sector; Home users can also use them. For example, you can set up a virtual private network at your home and use the credentials to access it from somewhere else. This way, the websites you visit will see the IP address of your home network, not your actual IP address.

Furthermore, most of the VPN services you see on the market are remote access VPNs. These services mainly help people to remove geo-restrictions on the internet. These restrictions could be due to government blocking or if a website or service is not accessible in a particular area.

VPN Site-to-Site

The word ‘site’ in this case refers to the physical location where the private network exists. It is also known as LAN-to-LAN or Router-to-Router VPN. In this type of VPN, two or more private networks in different parts of the world are connected together, all acting as a single virtual private network on the internet. There are currently two types of site-to-site VPNs.

Intranet Site-to-Site VPN

We call it an intranet site-to-site VPN when the various private networks of an organization are linked together over the internet. This type of VPN can share resources across various corporate locations. An alternative would be to place separate cables in different office locations, but that would be difficult to implement and could incur high costs.

The need to connect corporate networks belonging to different organizations. They may be collaborating on a project that involves resources from both organizations. Such virtual private networks are created called site-to-site VPN extranets.

Advantages and disadvantages

The biggest advantage of using a VPN is that it provides a cost effective way to create an individual network compared to renting and setting up a network line.

In addition to the benefits VPN gives us, it also has its weaknesses. Not having a streamlined process to ensure Quality of Service (QoS) over the internet is the biggest weakness of VPN technology. Furthermore, a level of security and authenticity outside of a private network is beyond the reach of VPN technology. And also incompatibility between different vendors.

What you should look for in a VPN

It totally depends on what you actually use the VPN for. Before choosing a provider, ask yourself three questions: How fast is it? Will a VPN keep data safe? Will it respect the user’s privacy? Similarly, these are the key factors that you should look for when choosing a VPN provider.

Alternatively, you can also use a VPN with Tor for extra privacy and security here.