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Fix acronym casing #18258

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May 8, 2020
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Fix acronym casing #18258

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5 changes: 3 additions & 2 deletions docs/framework/network-programming/using-udp-services.md
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Expand Up @@ -18,12 +18,13 @@ helpviewer_keywords:
- "application protocols, UDP"
ms.assetid: d5c3477a-e798-454c-a890-738ba14c5707
---
# Using UDP Services
# Use UDP services

The <xref:System.Net.Sockets.UdpClient> class communicates with network services using UDP. The properties and methods of the <xref:System.Net.Sockets.UdpClient> class abstract the details of creating a <xref:System.Net.Sockets.Socket> for requesting and receiving data using UDP.

User Datagram Protocol (UDP) is a simple protocol that makes a best effort to deliver data to a remote host. However, because the UDP protocol is a connectionless protocol, UDP datagrams sent to the remote endpoint are not guaranteed to arrive, nor are they guaranteed to arrive in the same sequence in which they are sent. Applications that use UDP must be prepared to handle missing, duplicate, and out-of-sequence datagrams.

To send a datagram using UDP, you must know the network address of the network device hosting the service you need and the UDP port number that the service uses to communicate. The Internet Assigned Numbers Authority (Iana) defines port numbers for common services (see [Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml)). Services not on the Iana list can have port numbers in the range 1,024 to 65,535.
To send a datagram using UDP, you must know the network address of the network device hosting the service you need and the UDP port number that the service uses to communicate. The Internet Assigned Numbers Authority (IANA) defines port numbers for common services (see [Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml)). Services not on the IANA list can have port numbers in the range 1,024 to 65,535.

Special network addresses are used to support UDP broadcast messages on IP-based networks. The following discussion uses the IP version 4 address family used on the Internet as an example.

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