Attempts to send an Internet Control Message Protocol (ICMP) echo message with the specified data buffer to the specified computer, and receive a corresponding ICMP echo reply message from that computer. This overload allows you to specify a time-out value for the operation.
- hostNameOrAddress
- A string that identifies the computer that is the destination for the ICMP echo message. The value specified for this parameter can be a host name or a string representation of an IP address.
- timeout
- An int value that specifies the maximum number of milliseconds (after sending the echo message) to wait for the ICMP echo reply message.
- buffer
- A byte array that contains data to be sent with the ICMP echo message and returned in the ICMP echo reply message. The array cannot contain more than 65,500 bytes.
A System.Net.NetworkInformation.PingReply object that provides information about the ICMP echo reply message if one was received, or provides the reason for the failure if no message was received.
If the ICMP echo reply message is not received within the time specified in the timeout parameter, the ICMP echo fails, and the PingReply.Status property is set to IPStatus.TimedOut.
When specifying very small numbers for timeout, the Ping reply can be received even if timeout milliseconds have elapsed.
This overload uses default settings for packet fragmentation and packet forwarding. The packet that contains the ICMP echo message can be fragmented in transit if the total packet size exceeds the maximum packet size that can be transmitted by one of the routing nodes between the local and remote computers. To prevent fragmentation, use one of the erload:System.Net.NetworkInformation.Ping.Send methods that takes an options parameter, and set the PingOptions.DontFragment property to true. When PingOptions.DontFragment is true and the total packet size exceeds the maximum packet size that can be transmitted by one of the routing nodes between the local and remote computers, the ICMP echo request fails. When this happens, the PingReply.Status is set to IPStatus.PacketTooBig.
The packet or packet fragments can be forwarded by routing nodes 128 times before being discarded. To change this setting, use a erload:System.Net.NetworkInformation.Ping.Send overload that takes an options parameter, and set the PingOptions.Ttl property to the desired value. If the packet does not reach its destination after being forwarded the specified number of times, the packet is discarded and the ICMP echo request fails. When this happens, the PingReply.Status is set to IPStatus.TtlExpired.