When the receiving socket detects an incoming segment of data, it uses the acknowledgement number in the TCP header to indicate receipt. After sending a packet of data, the sender will start a retransmission timer of variable length. If it does not receive an acknowledgment before the timer expires, the sender will assume the segment has been lost and will retransmit it.
The TCP retransmission mechanism ensures that data is reliably sent from end to end. If retransmissions are detected in a TCP connection, it is logical to assume that packet loss has occurred on the network somewhere between client and server. Most packet analyzers will indicate a duplicate acknowledgment condition when two ACK packets are detected with the same ACK numbers. Sending TCP sockets usually transmit data in a series.
Rather than sending one segment of data at a time and waiting for an acknowledgement, transmitting stations will send several packets in succession. If one of these packets in the stream goes missing, the receiving socket can indicate which packet was lost using selective acknowledgments.
These allow the receiver to continue to acknowledge incoming data while informing the sender of the missing packet s in the stream.
As shown above, selective acknowledgements will use the ACK number in the TCP header to indicate which packet was lost. Most network analyzers will flag these packets as duplicate acknowledgements because the ACK number will stay the same until the missing packet is retransmitted, filling the gap in the sequence.
Typically, duplicate acknowledgements mean that one or more packets have been lost in the stream and the connection is attempting to recover.
They are a common symptom of packet loss. In most cases, once the sender receives three duplicate acknowledgments, it will immediately retransmit the missing packet instead of waiting for a timer to expire.
These are called fast retransmissions. Connections with more latency between client and server will typically have more duplicate acknowledgement packets when a segment is lost.
Just right click the file you want to transfer and select Share. Click on Find more people to open your email contacts and choose from your contact list. This will open an email composition page. You can edit the email or just click Send to send off the file. When you receive the file via email, you can receive it on any device — either another computer or any mobile device.
Another approach you can take to transfer files from your Windows 10 PC to other devices is via the cloud. You can do this by sharing the file to any Windows app that supports services like OneDrive or Google Drive. At least one of these should be OneDrive. When the app opens, just click the Add checkmark button to add the file to your OneDrive cloud account.
The file will upload to your OneDrive account. On the other computer, open the OneDrive app, right-click on the file, and select Download. This will complete your file transfer to the other computer on your network or over the internet. If you want to go beyond just transferring files and instead actually browse folders and files on the other computer, there are plenty of LAN file sharing applications for Windows 10 that can help.
Windows 10 More How do I tell which files or folders I've shared over a network? Open Windows Update Make sure the computers are on the same network. Turn on network discovery and file and printer sharing, and turn off password protected sharing. Make sharing services start automatically. Need more help? Join the discussion. Was this information helpful?
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