Ограничение tcp подключений windows server

Windows Server 2019 — это высокопроизводительная операционная система, разработанная компанией Microsoft специально для серверных систем. Однако, даже с такими передовыми возможностями, у Windows Server 2019 есть ограничение на одновременное количество TCP подключений.

Ограничение TCP подключений может быть проблемой для пользователей, особенно в условиях активного сервера или компании с большим количеством клиентов. Внутренняя настройка по умолчанию позволяет только ограниченное количество TCP подключений одновременно, что может привести к снижению производительности сервера и возникновению проблем с работой приложений.

Однако, существует несколько способов справиться с ограничением TCP подключений в Windows Server 2019. Один из них — изменение параметров реестра. С помощью несложных настроек можно значительно увеличить количество одновременно открытых TCP подключений и таким образом улучшить производительность сервера.

В этой статье мы рассмотрим подробные инструкции по изменению параметров реестра, которые позволят увеличить количество TCP подключений в Windows Server 2019. Также, мы рассмотрим возможные риски и сценарии использования, чтобы помочь вам принять решение о настройке параметров TCP подключений в вашей серверной системе.

Ограничение TCP подключений в Windows Server 2019

Windows Server 2019 предоставляет возможность управления TCP подключениями для более стабильной работы и оптимизации сетевых ресурсов. Однако, по умолчанию, в операционной системе установлено ограничение на количество одновременных TCP подключений.

Ограничение TCP подключений может приводить к проблемам при высокой загрузке сервера или при использовании приложений, которые требуют большого числа параллельных подключений, например, веб-серверов или аналитических систем.

Чтобы справиться с ограничением TCP подключений, можно воспользоваться следующими рекомендациями:

1. Увеличить лимит максимального числа TCP подключений на сервере. Для этого необходимо изменить настройки в реестре Windows.
2. Настроить балансировку TCP подключений на уровне сетевого оборудования. Данное решение позволит равномерно распределить нагрузку на несколько серверов.
3. Использовать специализированные программные решения для управления TCP подключениями. Такие решения позволяют более гибко настроить параметры подключений и мониторить процессы.

Выбор подходящего варианта зависит от конкретных требований и условий эксплуатации сервера. Рекомендуется провести тестирование и анализ нагрузки перед принятием решения о внесении изменений в настройки TCP подключений.

Суть ограничения

Windows Server 2019 имеет ограничение на количество одновременных TCP подключений, которое может обработать. По умолчанию это ограничение составляет 16384 соединения. Однако, в некоторых случаях, это количество может быть недостаточным, особенно при высокой нагрузке на сервер.

Ограничение TCP подключений может привести к проблемам с производительностью сервера, так как новые подключения не будут приниматься, а пользователи могут столкнуться с длительным ожиданием или проблемами с доступом к приложениям и ресурсам.

Однако, существует несколько способов справиться с ограничением TCP подключений. Например, можно изменить ограничение через реестр или увеличить количество доступных портов для TCP подключений. При этом, необходимо учитывать возможность увеличения нагрузки на сервер и осуществление контроля над процессом увеличения подключений.

Влияние на работу системы

Ограничение TCP подключений на сервере может оказывать существенное влияние на работу системы. Если количество одновременных подключений превышает доступное число, то возникают следующие проблемы:

1. Потеря данных: Если количество подключений превышает лимит, сервер может отказывать новым подключениям, что может приводить к потере данных и неправильной работе приложений.

2. Замедление работы системы: Если серверу не хватает ресурсов для обработки всех подключений, производительность системы может снижаться, и все приложения могут работать медленнее.

3. Падение системы: В экстремальных случаях, когда количество подключений сильно превышает доступный лимит, сервер может полностью перегрузиться и выйти из строя, что приведет к недоступности всех приложений и сервисов на этом сервере.

Чтобы справиться с ограничениями TCP подключений, можно применить следующие решения:

1. Настройка организации подключений: Если необходимо обрабатывать большое количество подключений, можно рассмотреть возможность использования балансировщиков нагрузки или других методов организации подключений, чтобы распределить нагрузку равномерно между серверами.

2. Увеличение лимита подключений: В некоторых случаях можно увеличить лимит TCP подключений на сервере. Для этого можно изменить соответствующие параметры системы или воспользоваться специальными программами или скриптами.

3. Оптимизация сервера: Кроме увеличения лимита подключений, можно провести оптимизацию сервера, чтобы он более эффективно обрабатывал подключения и использовал ресурсы.

Windows Server 2019 — это высокопроизводительная операционная система, разработанная компанией Microsoft специально для серверных систем. Однако, даже с такими передовыми возможностями, у Windows Server 2019 есть ограничение на одновременное количество TCP подключений.

Ограничение TCP подключений может быть проблемой для пользователей, особенно в условиях активного сервера или компании с большим количеством клиентов. Внутренняя настройка по умолчанию позволяет только ограниченное количество TCP подключений одновременно, что может привести к снижению производительности сервера и возникновению проблем с работой приложений.

Однако, существует несколько способов справиться с ограничением TCP подключений в Windows Server 2019. Один из них — изменение параметров реестра. С помощью несложных настроек можно значительно увеличить количество одновременно открытых TCP подключений и таким образом улучшить производительность сервера.

В этой статье мы рассмотрим подробные инструкции по изменению параметров реестра, которые позволят увеличить количество TCP подключений в Windows Server 2019. Также, мы рассмотрим возможные риски и сценарии использования, чтобы помочь вам принять решение о настройке параметров TCP подключений в вашей серверной системе.

Windows Server 2019 предоставляет возможность управления TCP подключениями для более стабильной работы и оптимизации сетевых ресурсов. Однако, по умолчанию, в операционной системе установлено ограничение на количество одновременных TCP подключений.

Ограничение TCP подключений может приводить к проблемам при высокой загрузке сервера или при использовании приложений, которые требуют большого числа параллельных подключений, например, веб-серверов или аналитических систем.

Чтобы справиться с ограничением TCP подключений, можно воспользоваться следующими рекомендациями:

1. Увеличить лимит максимального числа TCP подключений на сервере. Для этого необходимо изменить настройки в реестре Windows.
2. Настроить балансировку TCP подключений на уровне сетевого оборудования. Данное решение позволит равномерно распределить нагрузку на несколько серверов.
3. Использовать специализированные программные решения для управления TCP подключениями. Такие решения позволяют более гибко настроить параметры подключений и мониторить процессы.

Выбор подходящего варианта зависит от конкретных требований и условий эксплуатации сервера. Рекомендуется провести тестирование и анализ нагрузки перед принятием решения о внесении изменений в настройки TCP подключений.

Суть ограничения

Windows Server 2019 имеет ограничение на количество одновременных TCP подключений, которое может обработать. По умолчанию это ограничение составляет 16384 соединения. Однако, в некоторых случаях, это количество может быть недостаточным, особенно при высокой нагрузке на сервер.

Ограничение TCP подключений может привести к проблемам с производительностью сервера, так как новые подключения не будут приниматься, а пользователи могут столкнуться с длительным ожиданием или проблемами с доступом к приложениям и ресурсам.

Однако, существует несколько способов справиться с ограничением TCP подключений. Например, можно изменить ограничение через реестр или увеличить количество доступных портов для TCP подключений. При этом, необходимо учитывать возможность увеличения нагрузки на сервер и осуществление контроля над процессом увеличения подключений.

Влияние на работу системы

Ограничение TCP подключений на сервере может оказывать существенное влияние на работу системы. Если количество одновременных подключений превышает доступное число, то возникают следующие проблемы:

1. Потеря данных: Если количество подключений превышает лимит, сервер может отказывать новым подключениям, что может приводить к потере данных и неправильной работе приложений.

2. Замедление работы системы: Если серверу не хватает ресурсов для обработки всех подключений, производительность системы может снижаться, и все приложения могут работать медленнее.

3. Падение системы: В экстремальных случаях, когда количество подключений сильно превышает доступный лимит, сервер может полностью перегрузиться и выйти из строя, что приведет к недоступности всех приложений и сервисов на этом сервере.

Чтобы справиться с ограничениями TCP подключений, можно применить следующие решения:

1. Настройка организации подключений: Если необходимо обрабатывать большое количество подключений, можно рассмотреть возможность использования балансировщиков нагрузки или других методов организации подключений, чтобы распределить нагрузку равномерно между серверами.

2. Увеличение лимита подключений: В некоторых случаях можно увеличить лимит TCP подключений на сервере. Для этого можно изменить соответствующие параметры системы или воспользоваться специальными программами или скриптами.

3. Оптимизация сервера: Кроме увеличения лимита подключений, можно провести оптимизацию сервера, чтобы он более эффективно обрабатывал подключения и использовал ресурсы.

For each concurrent connection, the tuple (source ip, source port, destination ip, destination port) on the TCP level must be distinct. Therefore, no client can establish more than 65535 connections to a single server at once. But (theoretically), a server can handle 65535 connections from one client at once.

How do servers dealing with extremely high amounts (more than the maximum port number of requests) of requests handle this if there is a limit on the number of ports one machine can have and a socket can only bind to an unused port number? e. numerous servers on numerous machines?

You don’t understand port numbers; a server can have a large number of open sockets from clients connecting to a single port while listening on just one port.

For each concurrent connection, the tuple (source ip, source port, destination ip, destination port) on the TCP level must be distinct. Thus, no client can establish more than 65535 connections to a single server at once. However, a server can (theoretically) accommodate 65535 concurrent connections per client.

On a busy server, the default timeout of 240 seconds will only allow for about 200 connections per second at most. The maximum connection limit will be raised if this setting is lowered.

Typically, a server is fixed to listen on a local port while it waits for a connection request from a client. The local listening port is exclusive regardless of address reuse, even if there are multiple IPs on the server side, so only remote IPs (i.e. In the server-side TCP connection 4 tuple, the client IP (client IP) and remote port (client port) are variables; therefore, the maximum TCP connection is the sum of the client IPs and client ports. For IPv4, this means that the maximum number of TCP connections is approximately 2 of every 32 times (IP number) and 2 of every 16 times (port number), or 2 of every 48 times.

Although the number of connections listed above is the theoretical maximum for a single machine, in the real world, machine resources, operating system restrictions, and other factors, particularly on the server side, prevent the number of concurrent TCP connections from ever reaching the theoretical maximum. A precise number is difficult to determine because the maximum TCP connections depend on a number of Windows server components.

The number of available ports may be exhausted if you are using a lot of TCP connections, especially if your connect/disconnect rate is high and all of your connections are in the TIME_WAIT state.

How many TCP connections can Windows Server 2016 support at once?

There can be a maximum of 33 connections per second on Windows platforms with a default timeout of 120 seconds and a maximum of about 4,000 ports.

TCP/IP ports and non-blocking NIO socket websites are used by the underlying search architecture to communicate with the search engines and direct searches across multiple physical partitions. Until the operating system times them out, these connections are open and in the TIME_WAIT state. As a result, the machine running the routing module may reach its limit of available ports under conditions of high load.

A maximum rate of 33 connections per second is possible on Windows platforms with a default timeout of 120 seconds and a maximum number of ports of about 4,000. If your index has four partitions, each search requires four ports, giving you a maximum query rate of 8.3 queries per second.

The supply of TCP/IP ports will run out if this rate is exceeded, which could result in failures. Throughput drops and errors indicating broken network connections are symptoms. Using the netstat utility that is included with most operating systems, you can identify this issue by watching the system perform under load.

TCP: Multiple client support

An easy-to-use server-client TCP application that explains client-server communication. Using fork, the server, which is a straightforward echo server, can manage multiple clients.

In Windows, how do I increase the number of TCP connections?

Click Settings in the left-hand pane, then select the Advanced tab. If Inherit is selected in the Advanced Network Engine Settings section, uncheck the box to make changes. Depending on your needs, increase the value of the Maximum TCP Connections property to 10,000 or more. click on Save.

The support period for Deep Security Manager 10 is over. To view more recent versions of the Help Center, use the version selector (above).

Maximum TCP connections to protected computers are permitted by Deep Security’s configuration. Network traffic is dropped when the allowed number of connections is exceeded, and Max TCP Connections firewall events take place. Increase the number of TCP connections that can be established at once on the computer where the Max TCP Connection event occurs to avoid dropped connections.

The network engine that limits the number of TCP connections is made possible by the intrusion protection module.

Windows Server 2012 can support how many TCP connections at once?

The amount of ports that can be used ranges from 256 to 64,010 (1025 through 65535).

You can control how many dynamic (ephemeral) ports are used for outgoing RPC communication in Windows Server 2012 by using the netsh command. The number of used ports can range from 256 to 64,010 (1025 through 65535). Extend the TCP and UDP dynamic port ranges to avoid this issue.

From a command prompt with elevated privileges, execute the netsh commands as Administrator.

Where range denotes the total number of ports and number denotes the starting port that will be used.

What is the Windows server’s maximum allowed TCP connection?

A maximum of 3975 TCP connections can be active at once under Windows. For each syslog message that is forwarded, a connection is used. My understanding is that UDP is faster because it lacks built-in error checking, so you will need to either change your “Forward to another host” setting.

Can a TCP server only support up to 65535 concurrent clients?

No, that is not the limit. That is the short reply. A TCP Port field has a capacity of 65536 and is 2 bytes in size. The total number of addresses that a server may have is capped at this number. However, this does not place a 64K client cap.

There are 65536 bytes in a TCP Port field, which is 2 bytes long. The number of addresses that a server can have is capped at this number. However, this does not put a cap on the number of clients at 64,000. Each TCP packet contains two port fields—one for the source and one for the destination—along with two IP addresses.

Each source and destination of a TCP connection have an IP address and a port number, making up a tuple. The source address (client side) can change depending on the port and IP address, but the destination (server side) remains constant.

While a client (or office) with a single IP address can only connect to your server 65535 times at once, if they had multiple IPv4 addresses, they could connect many times more.

A firewall can handle how many TCP streams?

There is no practical limit on the TCP level. For every set of server port, server ip, client port, and client ip, only one connection is possible.

I’m using the socket.accept() method on the server side to manage new client connections. The server uses a random port to communicate with the client when it connects.

Not unless you create a new, pointless connection from server to client, which you won’t be doing for firewall-related reasons. The listening socket and the accepted socket both use the same local port number. In opposition to a few of the answers and remarks made here,

It follows that your question is based on a misunderstanding. Whatever you run out of—memory, thread handles, socket handles, socket buffer space, CPUs, CPU power, virtual memory, disk space—is what matters. TCP ports won’t be involved.

How many TCP connections can be active at once in Windows Server 2016?

On Windows platforms, the maximum number of ports is roughly 4,000, the default timeout is 120 seconds, and there is a cap of 33 connections per second.

TCP/IP ports and non-blocking NIO socket websites are used by the underlying search architecture to connect to the search engines and direct searches across multiple physical partitions. When the operating system times them out, these connections continue to be active in the TIME_WAIT state. As a result, the machine running the routing module may reach its limit of available ports under conditions of high load.

There can be a maximum of 33 connections per second on Windows platforms with a default timeout of 120 seconds and a maximum of about 4,000 ports. If your index has four partitions, each search requires four ports, giving you a maximum query rate of 8.3 queries per second.

The supply of TCP/IP ports will run out if this rate is exceeded, which could result in failures. Drops in throughput and errors indicating broken network connections are symptoms. The netstat utility included with most operating systems can be used to monitor the system while it is under load in order to identify this issue.

How many TCP ports can be active at once?

The maximum number of sockets for a system with 2 GB or more RAM is approximately 16,000 for Windows 2000 and later versions.

Yes, there are restrictions, but you’ll never come close to them (connections are different from connecting or incoming connections; they refer to events that have already occurred and are in place, and their number is much higher than that of other states. Regarding the maximum number of connected sessions, @corsiKa provided a wise quotation.

The number of local ports you have assigned as your pool and that are currently available is what essentially determines how many open You-To connections you can have.

Additionally, there is a “buffer” on incoming ports that restricts the number of clients you can have concurrently connecting to you; more details can be found here:

What is the 6-TCP connection limit?

The majority of modern browsers currently support six connections per domain. Most outdated browsers have a two-connection limit per domain. According to the HTTP 1.1 protocol, single-user clients can only keep two connections open to any server or proxy.

The topic of maximum parallel HTTP connections in a browser will be covered in this tutorial.

To learn more about this subject, we will first understand parallel connections, the causes of blocking and how to overcome them, as well as browser limitations.

By explicitly asking for the original HTML page, the first embedded item, the second embedded object, etc., a browser might carelessly examine every embedded object in turn. However, HTTP allows clients to create connections and execute numerous HTTP transactions in parallel.

Can a TCP server support a maximum of five clients at once?

In other words, if only the port can be changed, there are a maximum of 65535 unique combinations of the connection tuple that the server can handle concurrently from the same client IP address.

The following text caught my eye as I was reading Oracle’s socket tutorial.

The server accepts the connection if everything goes according to plan. When the request is approved, the server receives a new socket bound to the same local port and also has its remote endpoint configured with the client’s address and port. It requires a new socket so that, while attending to the requirements of the connected client, it can continue to monitor the first socket for connection requests.

The maximum number of ports is 65K, if I’m not mistaken about the port size, which is 16 bits. If all of a server’s ports are bound to a client local port, the maximum number of connections it can handle at once is 65535. While some answers on StackOverflow, such as this one, opine that there is no cap on the number of active connections, What is correct about this, and what is incorrect?

How many connections can a server support at once?

By default, SQL Server permits up to 32767 concurrent connections, which corresponds to the most users who can log in to the SQL server instance at once.

This restriction is unbreakable. In one case, you get an error message and can’t connect until another connection becomes available if you use up the allotted number of user connections.

What alternative approach can be taken to connect more users?

Installing more instances on the server is one option if you have more connections, though. Each instance of SQL Server can support 32,767 connections. The maximum number of client connections per server node is 32767 * 50, as there are 50 instances per node that can be running. The maximum number per server node is 32767 * the maximum number of instances (Note: Please check the version of your SQL Server first).

How many TCP connections can a server support?

A single listening port can accept more than one connection at once. What is the theoretical maximum number of concurrent TCP connections that a server can handle? There is a “64K” limitation that is frequently mentioned, but it needs to be made clear that it applies to each client and each server port.

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The maximum number of TCP connections a Windows server can handle depends on a number of factors. The number of TCP connections can be increased by changing the TCP level. To increase the number of available connections, you must set the TIME_WAIT state to more than 5000 seconds. If you need to increase the number of TCP connections, you can adjust the TCP level by increasing the maxUserPort value.

As a general rule, Windows computers can handle about ten TCP connections at a time, and can reach fifty or 100 after logging in. This number can vary significantly depending on the application running on the machine. While web-browsers keep three to five open connections per tab, online apps can ramp up to fifteen or more. In either case, there is always room for more connections. To find out exactly how many TCP connections a Windows server can handle, you should run a system diagnostics utility.

You can use the netstat command to determine the number of TCP connections on the server. The netstat command will display the number of TCP connections and the active connections. The Microsoft TCP/IP connection limit is based on the TIME_WAIT state. A Windows server can handle up to 3975 connections at a time. However, as a server with high website traffic, this number can increase rapidly.

There are a few factors that affect how many TCP connections a Windows server can handle. It’s important to note that the maximum number of concurrent connections can increase significantly if website traffic becomes high. One way to increase the number of concurrent connections is to use more ports. By doing this, you’ll reduce the time your server spends in the TIME_WAIT state.

The limit on the number of connections is based on the Windows operating system’s default settings. Windows has a maximum number of 3975 TCP connections at any given time. The default is five, but you can enable more if you need more. Often times, a Windows server will receive a high volume of connection requests and will need to adjust its configuration. However, if a large number of simultaneous connections is the norm, your server will become unstable.

If you want to increase the number of simultaneous connections, you can edit the server’s registry settings. The TCP Port field contains two bytes with a limit of 65536. The TCP port limit is also determined by the server’s TIME_WAIT state. This setting is important to know if your server can handle the number of connections that it receives. The maximum number of TCP connections that a Windows server can handle depends on the software used.

How Many TCP Connections Can Windows Handle?

How many TCP connections can your Windows 10 server handle? The answer varies, but Windows is designed to handle between ten and four thousand connections concurrently. The lower limit is ten, and the higher the number, the higher the risk. To keep the number low, lower the maximum concurrent connections. A second important factor to consider when setting the limit is the TIME_WAIT state, which dictates the length of time that active connections are active.

When a server accepts incoming TCP connections, it allocates a socket for each connection. Sockets are allocated from a pool of non-paged memory, which is about 1/8th of the physical RAM. If your server has 2G of RAM, it can allocate up to 256M of socket handles. Therefore, the theoretical maximum Windows server can handle is 25,000 TCP connections, while the practical limit is approximately one thousand.

How Many TCP Ports Can Be Open at the Same Time?

The answer to the question of How Many TCP Ports Can a Window Server Handle at the Same Time depends on several factors. In addition, a high TCP connection rate can exhaust the number of available ports. To mitigate this, increase the number of available ports and reduce the TIME_WAIT state. Here’s how. The more TCP ports a Windows server can handle, the better.

As far as the number of concurrent TCP connections is concerned, Windows can handle up to 65535 connections. The number of TCP connections is not limited to six thousand, but you should set the maximum number of connections to one hundred and fifty-five thousand. However, if you want to increase this number, you must change the TCP level to allow more connections. Depending on your needs, you can increase the number of ports by changing the TIME_WAIT state.

While TCP is essential for Internet applications, it is often overlooked in Windows servers. Email, the World Wide Web, File Transfer Protocol (FTP), Secure Shell, peer-to-peer file sharing, streaming media, and more all use TCP. But this does not mean that your server can handle every available TCP port. If you run into this problem, it’s best to check out the recommended number of TCP ports for Windows Server.

How Many TCP Connections is Too Many?

There are different parameters that limit the number of TCP connections that a Windows Server can process. The maximum allowed connections is 16 Million, which sounds reasonable, but it may not be enough for your needs. If your server is constantly receiving requests, you may want to increase this limit. To find the right setting for your Windows server, read the installation manual. You can change the limit as necessary.

First, check the TIME_WAIT state. This value determines how long the server should wait before closing a connection. By default, this value is 240 seconds. However, if your server is overloaded, it may only accept 200 connections per second. Reduce the TIME_WAIT state to a lower value to increase the maximum number of connections. Make sure to restart your computer after making any changes.

Another important registry setting controls the number of inbound TCP connections on your Windows server. The maximum number of TCP connections is set at 3975. In addition to this, the number of connections is also limited to 10 with SYN-Attack-Protection. This setting prevents the spread of worms and P2P programs. However, it may be too much for your server if you have a large number of Monitors configured on it.

How Do I Know How Many TCP Connections?

The maximum number of TCP connections that a Windows server can handle depends on several factors. This limit may be reached when the number of active TCP connections exceeds the number of open ports. If the maximum number of connections is too high, the server’s TIME_WAIT state may be exhausted. A way to decrease the TIME_WAIT state is to increase the number of available ports.

In order to know how many TCP connections a Windows server can handle, you can use the netstat command. This command displays the number of active TCP connections and the number of bytes sent and received over these connections. You can also check the network connection usage with the iftop command. This command can be run manually or by using a command line interface.

A good way to check how many TCP connections a Windows server can handle is to type netstat -anob on the system’s command line. A huge number of entries will appear. These are ephemeral TCP connections. That is, they are already closed but remain reserved. They cannot be reused by other TCP connections. If this happens, you can use netstat -anob to see if there is a reason for the high number of TIME_WAIT connections.

How Do I Increase TCP Connection?

If you’re wondering how to increase the TCP connection limit on a Windows server, the answer is simple: edit the Windows registry. The maximum number of TCP connections is ten by default, but you can increase that limit by increasing the TcpTimedWaitDelay value. Then, reboot the server. The changes will take effect after the next reboot. And there are other ways to increase the TCP connection limit on Windows servers.

The first option is to increase the TCP key, which determines the highest port number that an application can use. The second option increases the default number of pending connections. Default connections are twenty. You can increase that number to 1000. When there are less than twenty connections, the number of available connections increases by 10. The TCP key also affects the number of keep-alive transmissions and unacknowledged data segments.

You can change this limit by changing the TCP stack’s restriction limits. This can be helpful for applications that frequently open connections, or for web servers like IIS. You can modify the TCP stack’s restriction limits with the command “tcp”. If you change this value, it will remain after reboots. To change the TCP connection limit, go to the Windows registry and edit the value of the key.

How Many Ports Can a Server Have?

To answer the question, “How Many ports can a Windows server handle?” you must first understand the role of each port. Ports are analogous to channels on a cable box. The cable company knows how to send the cable to the cable box based on the IP address and serial number. This article will explain the different port types, and how each one affects your system. In addition, it will explain why it is so important to know the proper port range for your Windows server.

Each port in a Windows server has one (1) permitted socket. Each socket is comprised of a network address and protocol. A client connects to a particular port on the server. The server responds to the client’s request by listening to that port. However, a server can exhaust its available ports at some point. If all ports are in use, a new connection attempt will be refused, and a message will be written to the event log.

Learn More Here:

1.) Windows Help Center

2.) Windows – Wikipedia

3.) Windows Blog

4.) Windows Central