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Network Engineering

Questions tagged [udp]

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For questions about User Datagram Protocol, a Transport Layer protocol.

230 questions
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if the lower layers are already doing error checking and retransmission for each local link, why do we need transport layer protocols to also worry about delivery? Aren't they redundant? For example, ...
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3 votes
1 answer
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I have six processes, working on UDP port 7447: one server and five clients. I would like to show all of them, so I tried the commandline command netstat -aon | findstr "7447", but this ...
Dominique's user avatar
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1 answer
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I'm testing out a setup that I would reproduce in a production environment if I get it work. What I have: A wireless network 192.168.88.0/24 An IoT device X in the wireless network A Teltonika router ...
path's user avatar
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1 answer
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In Wireshark, when I follow a TCP or UDP stream using right click -> Follow -> UDP Stream, if there are some ICMP packets from same endpoints, wireshark will keep them in the stream. Why? Since ...
Sourav Kannantha B's user avatar
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I am new to networking and was learning about the UDP Protocol and i came through the term UDP checksum. I searched the internet spent so much time finding the correct way to calculate the UDP ...
Immad's user avatar
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1 answer
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Here is my network configuration: My Embedded board(192.168.124.249) sends a 16-byte UDP packet to my PC2(192.168.124.10) each 1ms. Here is my PC2 received data: Everything works fine until I ...
John Jin's user avatar
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TCP is capable of segmentation, i.e. even if the application layer creates an arbitrarily large message, the transport layer under TCP will split it into segments. Now, as per this answer, UDP doesn't ...
Kushagr Jaiswal's user avatar
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1 vote
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I am trying to forward a UDP Unicast message so that it cant be received by multiple computers. Can anyone point me in the right direction for how to accomplish this? Here are the details: There are ...
James Duvall's user avatar
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1 answer
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I am currently running into walls when trying to pop an mpls label with ovs. I currently have two interfaces on one ovs instance connected to ports eth0 and eth1. I define a flow on eth0 to pop an ...
Friwi's user avatar
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1 answer
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is port 8080 open (auto forwarded) in all devices? i used it without PortForwarding and UDP packets transferred successfully! i expected the NAT to block this but public ip address worked simply! i ...
n12y's user avatar
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3 votes
1 answer
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I'm learning the TCP and UDP protocols and I have a question about UDP. I used C to develop a UDP server and a UDP client in my LAN and it works as expected. The server and the client could ...
Yves's user avatar
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2 answers
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UDP is unreliable, why does I2P (garlic routing, an alternative to Tor) use UDP instead of reliable alternative: TCP? Won't I2P become unreliable due to UDP?
Flan1335's user avatar
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I have been working with a device that sends me UDP packets heavily. I'm trying to capture those packets in my Linux machine (Ubuntu 22.04.2 LTS) with Python programming language. But, most of the ...
mustaphos's user avatar
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1 vote
3 answers
588 views

I am analysing a Wireshark capture as part of understanding UDP/TCP, DNS and HTTP concepts and how packets are sent. I found an interesting sequence of messages in the Wireshark file, but I am not ...
Tita's user avatar
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1 vote
1 answer
91 views

I had a doubt regarding point-to-point protocol. Is it possible for a single PPP link to enable running of 2 or more simultaneous applications between two hosts? Thanks!
ikben's user avatar
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