File Transfer Protocol Server is a computer that provides file storage and access services on the Internet. They provide services in accordance with the FTP protocol. FTP, the file transfer protocol is a set of standard protocols for file transfer on the network, using the client/server model. FTP is a protocol specifically used to transfer files. FTP is a client/server system. Users use a client that supports the FTP protocol to connect to a server program on a remote host. The user issues a command on the client, and the remote host server executes the command issued by the user after receiving the command, and returns the execution result to the client. Simply put, the user sends a command to the server, asking the server to send a file to the user. The server responds and sends the file to the client. The user receives the file and places it in the user's working directory. This process is carried out by the FTP server. Exchange of documents. How Does FTP Server Work? FTP is based on the TCP protocol service, which is a file transfer protocol on the Internet. By default, two ports 20 and 21 are used, a data port and a command port, and port 20 is a data port for file transfer between the client and the server data flow. Port 21 is a command port used to transmit control flow and accept related FTP commands and parameters issued by the client. The FTP client sends a service request to the FTP server in the computer network. The FTP server receives and responds to the FTP client's request and provides the FTP client with the required file transfer service. According to the provisions of the TCP protocol, FTP servers use well-known port numbers 20 and 21 to provide services, and FTP clients use temporary port numbers to send requests. The FTP protocol specifies different well-known port numbers for control connections and data connections, the well-known port number for control connections is 21, and the well-known port number for data connections is 20. The FTP protocol uses a continuous connection communication method, and the maintenance time of the control connection it establishes is usually long. After explaining the main connection method of the working principle of FTP, then explain the two types of data connection establishment in the working principle of FTP: active mode and passive mode. The active mode of FTP is that the client connects to the well-known port of the FTP server from any unprivileged port, that is, port 21. After receiving the command, the FTP server connects to another temporary port of the client from the data port and returns data; passive mode means that the client opens two arbitrary non-privileged ports to submit commands, and the FTP server passively opens any non-privileged ports to send commands to the client After the client receives the command, it initiates a connection to the FTP server from the local port to establish a transmission data channel. In this mode, the command connection and the data connection are initiated by the client to solve the problem of the server initiating the connection to the client. Generally speaking, if we take the server as the criterion. Active mode: The server initiates a connection to the client from port 20. Passive mode: The server passively waits for a client to initiate a connection on a port within a specified range. The realization goal of FTP is to realize the safe sharing of file data, that is, the computer client can connect to the FTP servers around the world through the FTP client and the Internet to achieve file data sharing and resource sharing. Realize information interaction, that is, other computer clients can access the FTP server built on your computer through the Internet, so that your information can be spread to all parts of the world. Carry out effective data transmission. Files can be exchanged between computers of different types, different systems, and different formats. Do you know the FTP server now? For related articles, you can click here to learn more.
At work, we almost certainly encounter problems of file synchronization, and if there are many files modified every time, the manual comparison is a very troublesome thing, so we need assistance from the file synchronization tools, especially two-way file synchronization tools. So what is the best file synchronization software? 1. DiffSync DiffSync is an expert in file synchronization. It is powerful and can compare files according to their size, creation time, modification time, access time, file attributes, etc., and synchronize differences according to the comparison results. Unique high-performance algorithm makes file comparison so fast. Ultra-fast file copying makes it easy to synchronize a large number of files. 2. FastCopy FastCopy is the fastest file copying software on the Windows platform. It supports UNICODE and file path names exceeding MAX_PATH , developed by a Japanese company, and supports simple file synchronization function. 3. FreeFileSync FreeFileSync is a folder comparison and synchronization software, which can create and manage backup copies of all important files. FreeFileSync does not need to copy every file every time but determines the difference between the source folder and the destination folder and transfers only the minimum amount of data required. FreeFileSync is open source software, which can be used for Windows, macOS, and Linux. 4. GoodSync GoodSync is a simple and reliable software for file backup and file synchronization. It automatically analyzes, synchronizes, and backs up your e-mail, precious family photos, contacts, MP3 songs, financial files, and other important files, such as desktops, laptops, servers, external drives, Windows Mobile devices, as well as WebDAV of users remotely via FTP, etc. 5. Allway Sync Allway Sync is a Windows file synchronization software. It can synchronize files among several folders and automatically overwrite the updated files with the old files in several synchronized folders. Allway Sync is such a free and easy-to-use Windows file synchronization software, which can synchronize several different folders in the computer with each other, and also with folders such as network neighbors, FTP, WebDAV, mobile hard disk, etc., with powerful functions. It supports XP~Win10 system and Chinese. 6. PathSync PathSync is a directory file synchronization tool. PathSync can analyze two directories and display a list of differences between directories to users. Users can select the actions to be performed and allow PathSync to synchronize.
Product Overview Raysync software provides a stable and reliable file transfer solution. The ability to transfer large files to global locations is a major challenge. The growing generation and collection of data for processing results in 100s Terabytes of potential data that needs to be shared or transferred to global teams. Raysync offers high-speed data transfer tool to optimize bandwidth usage and minimize latency. High Speed Data Transfer Traditional data transfer methods such as FTP are extremely slow and not at all suitable for transferring large files over long distances. Comparative analysis shows speed enhancements of 100x for long distance transfers. Transferring a 10GB file trans-Atlantic on a 100Mbps line could take 15-20 hours using FTP whereas just 15 minutes using Raysync. Latency, connection breaks, packet loss are major performance barriers. Raysync is built for ease of implementation and integration taking into account the ease for the end-user. IT Technicians The technology is evolving fast, there are multiple departments and tools available to solve hundreds of business cases, each evolving continuously and each with its own learning curve. Raysync was built to solve a major IT concern but at the same time be a tool that would not burden the team with a new learning experience. Easy to Install and Deploy This is an excellent feature of Raysync. A standard install feature with auto-setup allows a team to startup in less than 15 mins. The installation process is standard with self-explanatory features. An internal study showed that using just the standard user manual, 97% of the participants with varied IT skills ranging from novice to experts were able to set up and start using Raysync successfully. Raysync also has advanced features and SDK access for teams willing to incorporate it more deeply into the operational process. Support for Local Storage or Object Storage Raysync supports local storage or cloud-based object storage. The local storage path for data at rest can be set with a simple path selection. The same feature can also enable IT teams to set object storage such as AWS S3, Microsoft Azure, Google drives or S3 API supported storage such as Wasabi and Backblaze in just a few clicks. Group Space IT teams can create multiple groups based on business logic or departments. Users can be assigned to these groups with detailed access to permissions. Create data hierarchy so as to have a need to know based access with minimum fuss. Active Domain Configuring the AD domain is supported to provide better import user operations for IT teams. Helping team and users centralize resources and security administration and simplify resource location. Transfer Performance IT teams can manage and control transfer rates and performance for each user at the individual or group level. Limit server performance for non-critical aspects of the business or allow equal bandwidth sharing or transfer control at the individual level, use your logic to control performance for best results using just the admin screen. Automatic File Sync Raysync comes with an automatic sync feature allowing an update data status for all users. IT admin has access to control the sync access, sync folder. Third-party Upload/Download Request Allow third-party partners to transfer data to and from your location without sharing any confidential details. An isolated request with inbuilt security allows third-party to only the eligible information. Full Data Encryption Protection Raysync has ultra-high security defense function to protect shared data between internal and external. Multiple security protections are established through user identity verification, data integrity verification, and AES-256 encryption algorithm. In conclusion, Raysync software is built keeping in mind the end-user and ease of operations. Reliability, affordability, and convenience are the strengths of Raysync.
Synchronous Transmission Synchronous transmission is the transmission of data in units of data frames. Frame synchronization signals in the form of characters or bit combinations can be used. The transmitter or receiver provides a clock signal dedicated to synchronization. In short-distance high-speed transmission, the clock signal can be transmitted by a dedicated clock line; when the computer network adopts the synchronous transmission method, the clock synchronization signal is often embedded in the data signal frame to achieve clock synchronization between the receiver and the transmitter. In digital communication, synchronization is very important. When the transmitter transmits data information to the receiver through the transmission medium, for example, each time a character data signal is sent, the receiver must recognize the start bit and end bit of the character data signal To correctly read each bit of the data signal of the character at the appropriate time, this is the basic synchronization problem between the receiver and the transmitter. When transmitting data signals in data frames, to ensure the integrity and accuracy of the transmitted signal, in addition to requiring the receiver to be able to recognize the start and end of the signal corresponding to each character , to ensure that the reading starts and ends at the correct time Retrieving the signal means maintaining the integrity of the transmitted signal; it is also required to keep the clock and the transmitter at the same frequency to ensure that the number of signal units reads per unit time is the same, that is, to ensure the accuracy of the transmitted signal. Therefore, when transmitting data signals in data frames, the transmitter is required to take the following two measures for the transmitted signals: ①Add a start signal and a stop signal different from the data signal before and after the corresponding signal of each frame of data; ② Add a clock synchronization signal before the data signal of each frame to control the clock synchronization of the receiver. Asynchronous Transmission Asynchronous transmission is the transmission of data in units of characters, using character synchronization signals in the form of bits. The transmitter and receiver have independent clocks , and neither side provides clock synchronization signals to the other side. . The sender and receiver of the asynchronous transmission do not need to coordinate before the data can be transmitted: the sender can send data at any time, and the receiver must be ready to receive data at any time. The asynchronous transmission mode is generally adopted between the computer host and the input and output devices. Such as a keyboard, a typical RS-232 serial port : the sender can send a character at any time . The Advantages and Disadvantages of Asynchronous and Synchronous Data Transmission 1. Asynchronous transmission is the character-oriented transmission, while the synchronous transmission is bit-oriented. 2. The unit of asynchronous transmission is character and the unit of synchronous transmission is a frame. 3. Asynchronous transmission seizes the opportunity of re-synchronization through the start and stops codes of character start and end, while synchronous transmission extracts synchronization information from the data. 4. The asynchronous transmission has lower requirements on timing, and synchronous transmission often coordinates timing through a specific clock line. 5. Asynchronous transmission is less efficient than synchronous transmission. To Sum Up Both asynchronous transmission and synchronous transmission have the above basic synchronization problem: character synchronization or frame synchronization signals are generally used to identify the start and end of transmitting character signals or data frame signals. The main difference between the two is whether one of the transmitter or receiver sends a clock synchronization signal to the other party.
In the Internet age, speed determines efficiency. In the process of enterprise production, it is necessary to exchange and carry information and data, and then file transfer is necessary. All aspects of the industry involve the transmission of large files. For example, the film and television industry needs to transmit video materials every day, and video data as small as tens of megabytes and as many as several tons should be transmitted from the shooting place to the video center. Or meteorological observation points around the meteorological industry need to make meteorological observations in real-time and summarize the data to the Meteorological Bureau immediately and effectively, so as to issue accurate weather forecasts. Faced with such a huge amount of data, how can enterprises transfer large files safely, stably and efficiently, then the large file transfer tool is essential for enterprises. Small file transfer can be carried out by using network sharing tools such as WeChat, email, etc. Although the point-to-point transfer is convenient to use, there is a limit to file size, and the speed is sometimes slow according to the network environment. But it is a convenient choice for individual users to transfer small files. Large file transfer using Filezilla, network disk, and so on is stable and supports breakpoint continuous transfer. However, the speed of large file transfer is extremely slow, the packet loss rate is high, the transfer reliability is poor, and the speed of transnational transfer is particularly low. It is inconvenient to use the network disk, and it is necessary to upload the file to the terminal before downloading it. In addition, for large files, it is also possible to send a large number of files to their destinations. However, unpredictable problems such as hard disk damage and express delivery delay easily occur during transportation, and the real-time performance cannot be achieved. Speed determines efficiency, time determines money. Nowadays, big data is very important for enterprises, and huge data must be transmitted quickly in order to grasp the information in the hands of enterprises in real-time. Realizing the fast transfer of large files can improve work efficiency, and make enterprises one step ahead of others. According to the needs of the film and television production industry, Raysync Transmission has launched a solution for the film and television production industry based on ultra-high-speed transfer protocol. Thoroughly overcome the inherent bottleneck of traditional data transfer methods, such as FTP and HTTP, and provide the maximum transfer speed that is not affected by network conditions and transfer distance for video transfer, video upload, video return, and other audio-visual content transfer, thus providing the real high-performance data transfer for the film and television production industry.
Many enterprises only need some instant messaging tools to handle the daily file exchange work, and they only need to accelerate the transfer of large data sets at certain specific times or situations. Some enterprises have only a handful of demands for the accelerated transfer of big data, and the traditional monthly or yearly plan will inevitably lead to unnecessary idleness and waste of resources. Raysync now supports pay-as-you-go service, and enterprises can start big data acceleration service by selecting corresponding traffic packets. The introduction of the traffic version can effectively control the cost consumption of enterprises, eliminate the waste of resources, and enjoy the accelerated transfer service of Raysync at low cost. The key features of Raysync Pay-as-you-go: Large file transfer: optimizes the transfer of large files by using the intelligent segmentation technology, supports the high-speed and stable transfer of large files, and break through the barriers of big data exchange. Configuration: 4-core 8GB memory; Bandwidth: 200MB/s; Test file: 10GB from Beijing to New York Mass small file transfer: supports intelligent compression, virtual splicing technology of mass small files, and new disk I/O optimization technology. Raysync Transmission ensures the integrity of transfer, supports the high-speed and stable transfer of mass small files, and makes mass data flow without barriers. Configuration: 4-core 8GB memory; Bandwidth: 200MB/s; Test file: 100,000 small files from Beijing to New York Transnational file transfer: Raysync self-developed high-speed transfer protocol allows the enterprises to send, share, and synchronize large data sets at high speed around the world. Synchronization function: Raysync has the flexible architecture and easy-to-construct data replication capability and supports bidirectional synchronization between server and client, that is, server files can be synchronized to client and client files can also be synchronized to the server, and synchronization function relieves users from the pain of manual copying. Raysync Pay-as-you-go provides efficient and controllable services of accelerating the transfer of large files, ultra-long distance and transnational network data transfer, and meets various transfer requirements of enterprises. Case study: An intelligent technology company urgently needs to transfer 8TB of R&D data to the Swiss branch, and there is no urgent need for big data transfer at ordinary times. Customer demand analysis: 1. "Urgent" demand: R&D data needs to be distributed to the Swiss branch as soon as possible and put into production immediately. If you mail the hard disk or the traditional FTP transfer method, you can't meet the customer's demand for the timely delivery of the data. 2. Cost control requirements: The companies’ big data transfer has the characteristics of low frequency. The company has not set enough budget for the big data transfer project. After understanding the data transfer solutions in the market, it is found that a set of software needs to cost hundreds of thousands, which will cause serious waste of resources and financial resources, which is inconsistent with the needs of the company. 3. Flexible requirements: Just like the urgent transfer of 8TB files to Switzerland this time, we can't predict whether the next large file transfer task will also be affected by unexpected factors, that is, the transfer software pay-as-you-go plan is the best choice for enterprises. 4. Data security requirements: Production R&D data is the lifeblood of enterprise production and operation, and its importance is self-evident. In the process of transfer, due to poor network environment and long transfer distance, it may lead to low transfer efficiency, and file transfer security loopholes are more likely to occur. The leakage of R&D data will bring a devastating blow to enterprises. Considering the need to transmit enterprise R&D data overseas, the company has high requirements for the security of the transfer process. 5. Requirements for easy-to-use: The company's big data transfer frequency is low, the interface is simple, the operation is simple, and the convenient and fast transfer software is deployed, which will greatly reduce the time cost for employees to learn to use the software, and the work of data uploading and downloading will get started faster. The Raysync server is deployed at the Nanjing headquarters of the company, and the team members of the Swiss branch can log in to Raysync through IP address and port number, so as to easily upload and download the production R&D data. Compared with the traditional FTP transfer, the timeliness of Raysync transfer is improved by 96%. The values Raysync pay-as-you-go brings to customers: Raysync is based on UDP transfer protocol, which overcomes the difficulties of traditional data transfer software , provides the highest transfer speed which is not affected by network conditions and transfer distance, delivers the important data assets in Switzerland at an extremely high speed, and puts them into tight production links to improve the competitiveness of enterprises. Bank standard encryption to ensure the safe delivery of important assets. Based on SSL encryption transfer protocol, AES-256 encryption technology of international top financial level is adapted to encrypt the data in the whole channel of receiving and sending, so as to ensure that the data will not be stolen or leaked during transfer and avoid the data assets of enterprises from being infringed. Enterprises can flexibly purchase the download traffic according to the actual situation, which can save 60% of the cost compared with other data acceleration transfer plans in the market. Raysync pay-as-you-go effectively controls the cost consumption of enterprises, eliminates the waste of resources, and realizes the cost optimization! It is simple to deploy and can be easily integrated into the existing system of the enterprise so that users can immediately obtain the big data transfer and control capabilities; It can flexibly set the group space and sub-account access rights, simplify the data delivery process, and reduce the learning cost of employees without changing the original operation mode.
File Transfer Protocol is a standard Internet protocol used to transfer files between computers on the Internet via a TCP/IP connection. FTP is a client-server protocol, the client will request the file, and the local or remote server will provide the file. The end-user computer is usually called the localhost, and it connects to a remote host through the Internet, which is the second computer running FTP software. How Does FTP Work FTP is a client-server protocol that relies on two communication channels between the client and the server: a command channel used to control the conversation and a data channel used to transfer file content. The client initiates a dialogue with the server by requesting to download the file. Using FTP, the client can upload, download, delete, rename, move, and copy files on the server. Users usually need to log in to the FTP server, although some servers can make some or all of the content available without logging in. This is called anonymous FTP. FTP sessions work in passive or active mode. Inactive mode, after the client requests to start a session through the command channel, the server will start a data connection with the client and start transmitting data. In passive mode, the server instead uses the command channel to send the information needed to open the data channel to the client. Because passive mode enables clients to initiate all connections, it works well between firewalls and network address translation gateways. Users can use FTP through a simple command-line interface or a dedicated graphical user interface . Web browsers can also be used as FTP clients. What is FTP for? FTP is a useful tool to move information from the computer you are using to the server hosting the website. For example, if you want to install WordPress on a web server, you need FTP to copy files. Sometimes used as a way to share files. One person can upload the file to an FTP server and then share the link to the file with another person. In the era of easy-to-use cloud services , this usage has become less common, but some people prefer to host the file on a home server and use FTP to enable it. FTP is the simplest and earliest format that can quickly move files from one device to another. Its origins can be traced back to 1971, and it was originally created and distributed by Abhay Bhushan. In the 1980s, the FTP format was updated to the TCP/IP version associated with the server. FTP uses two basic channels for operation. The command channel carries information about the task itself-which files to access, whether commands are being registered, etc. Then, the data channel transmits the actual file data between the devices. These FTP connections can also have active and passive modes. Active mode is the most common mode, which allows open communication between the server and the device through two channels, and the server actively establishes a connection by approving the data request. However, this mode may be interrupted due to firewalls and similar issues, so there is also a passive mode where the server will pay attention but not actively maintain the connection so that another device can do all the work. Security FTP was originally defined in 1971, before the definition of TCP and IP, and has been redefined many times-for examples, using TCP / IP , and then using Internet Protocol version 6 , . In addition, because there is no need to consider security in the definition, it has been extended several times to improve security: for example, a version encrypted by TLS connection or one that can be used with Secure File Transfer Protocol Version SSH file transfer protocol. FTP does not encrypt traffic, and individuals can capture data packets to read usernames, passwords, and other data. FTP may still be vulnerable to brute force attacks, packet capture, spoofing, FTP bounce, and other attacks . As mentioned earlier, FTP itself does not provide other security mechanisms besides providing passwords. If the data you send is not considered sensitive and/or limited to transferring files within the network, FTP can be used very well. If sensitive data is being transferred outside the corporate network, please do not use this simplest form of FTP. Raysync FTP acceleration product is a software that can directly connect to the existing FTP server system. Which can improve transmission speed by 10 to 100 times? It is able to highly integrate with the existing server architecture to achieve high-speed file transfer. Which file transfer solution you use depends only on your budget, the content to be transferred, and the type of encryption required.
Nowadays, people are in a digital age, and many files need to be stored and transferred, especially some oversized files, because the files are getting bigger and bigger now, from the initial K-grade to the current G-unit, all of which need more and more space to store. At the same time, the stored files are often shared with friends and colleagues, some even in different places. This is another problem that needs to be solved, that is, large file transfer. How to solve these difficulties in file transfer? In the past, we would upload data to a certain network disk and let the other party download it. But it sounds like too old today and it’s the time to say goodbye to such a traditional way. Now, the file collaboration platform with the most innovative experience, Raysync Cloud, can be used for super-large file transfer. It only needs to upload files to the platform once, and when necessary, it only needs to use the sharing function. No matter how many files are, they can be transferred to relevant personnel with one click. The super-large file transfer function of Raysync Cloud can transfer files to people in need anytime and anywhere without being limited by time, distance, file size, or even network speed. The realization of these functions is as simple as uploading files to the platform once and clicking the Share button. In the future, if the file is modified several times, the version will be automatically overwritten without uploading it again. With Raysync Cloud, it’s never been so easier to transfer large file, you can sync your file to the cloud platform with only one click. At the same time, by adopting bank standard AES-256 encryption, Raysync provides security features to protect your files from internal and external risks. Choose Raysync Cloud, which makes it easy for you to transfer large files!
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