All Questions
41
questions
0
votes
0
answers
79
views
Ethernet connection loses upstream UDP and TCP packets but downstream UDP packets are fine
2 of my PCs are connected to my router like so:
Both PCs' ethernet cables -> Switch -> ethernet cable -> ethernet socket -> ethernet cable from socket -> switch -> ethernet cable to ...
- 398
1
vote
1
answer
3k
views
UDP client to listen to a multicast group/port without setting its own IP?
I have a small microcontroller device that I program via USB using Python. The device has an Ethernet connection, which can be configured either with DHCP or by manually setting the IP/Subnet via USB. ...
- 121
1
vote
1
answer
730
views
Why does my internet connection only work properly with a UDP-based VPN?
My house is connected to the main router in another building via a single LAN cable that is run partially underground, partially outside (along the wall of the house). There is one switch on the route,...
- 11
0
votes
1
answer
325
views
What address type do DNS queries use?
I was reading this thread and it was mentioned that DNS servers use anycast address. I have also heard that there is something called Unicast DNS as well.
So, my question is what type of addresses ...
- 13
2
votes
1
answer
2k
views
Why are DHCP messages broadcast?
I am learning DHCP in my networking class and as a part of my research, I was watching the following video:
https://www.youtube.com/watch?v=0UvLRVlPx6A
In the Wireshark capture in the above video (at ...
- 135
1
vote
1
answer
554
views
Why do most application protocols have two ports assigned?
So I am trying to learn about the application layer in the OSI model and when I go to the IANA website, I notice that most of the well known protocols have same port assigned for TCP and UDP.
For ...
- 135
0
votes
1
answer
3k
views
Convert Received TCP packets to UDP and forward those packet
I have a service that listens on a TCP port and communicates with a peripheral. I'd like to forward the received packets by the service through UDP to an another computer. I don't need handshake with ...
- 15
1
vote
0
answers
1k
views
Netcat/nc messages not send/received on either computer
I have two computers (both running Ubuntu) in the same network. They are able to ping each other successfully. Their IPs are:
Computer 1: 172.16.10.59
Computer 2: 172.16.10.72
The following works: ...
- 111
0
votes
0
answers
299
views
Wifi connection not working with VPN using UDP, EPN protocol, but fine with VPN using TCP protocol
I have a wifi connection (MobyKlick) in my appartment which has no router available for configuration.
The internet works fine as long as I'm not connected to a VPN network using either the UDP or ...
- 101
0
votes
1
answer
508
views
Why DNS look up is UDP?
UDP does not guarantee the message delivery
Does not guarantee ordered transmission.
Its connection less.
But per my understanding DNS shouldbe needing all these three features while lookup. Let's ...
- 639
3
votes
1
answer
1k
views
Slow TCP/IP and UDP communication
I am working with a device on a metal cutting machine that communicates using TCP/IP or UDP over Ethernet. I wrote a test program that writes and read ten registers and times how long it takes for the ...
- 151
3
votes
2
answers
5k
views
Getting a UDP-only VPN to work over TCP
For a project of mine, I'm searching for possibilities to have a UDP-only VPN working over TCP (preferably on port 443 or 80). I have found the following while doing some research:
This is possible ...
- 133
0
votes
1
answer
79
views
What are network ports internally? [closed]
I know there will be multiple ports in the host/computing machine for each of the services that i hosts on the network.
But i want to understand what are these ports internally?
Below is my ...
- 659
1
vote
1
answer
1k
views
Difference in network utilization between single and multiple TCP connections
We know that the way (basic) TCP works is by starting with slow-start phase followed by a linear increase of congestion window (CWD). The CWD is adjusted according to network status. So once we ...
- 195
4
votes
1
answer
2k
views
how do the world's peer to peer networks handle UDP hole punching?
With Bitcoin and Ethereum in the news so much I started to look into peer to peer networks more. My question is, do most of the people running full Bitcoin or Ether nodes have to open port 8333 to the ...
- 651