All Questions
39
questions
-1
votes
0
answers
22
views
My download speed is decreased on the browsers after these changes
I watched a network optimization video for Windows OS's on the internet and did some changings on my PC according to video. After what I did, I realized when downloading something via Brave it took ...
0
votes
1
answer
52
views
How do we reach an IP address?
How does the following work in TCP/IP protocol?
There are two subnets:
subnet A is 10.0.0.0/8
subnet B is 10.20.0.0/16
A host in Network A with an IP address of 10.20.3.4 wants to access a host 10....
2
votes
1
answer
184
views
Are extra flags discarded in TCP exchanges?
A "normal" TCP handshake looks like this:
MachineA → SYN → MachineB
Machine B → SYN,ACK → MachineA
MachineA → ACK → MachineB
This means that for each step, a flag (or set of flags) is ...
- 3,263
0
votes
0
answers
187
views
Windows can't connect more than 64k concurrency outgoing connection
I'm trying to make 100k concurrency outgoing connection from one pc to my local server.
My program can use specific ip on each connection.
Goal : 1 pc have around 100k concurrency outgoing connection.
...
0
votes
0
answers
651
views
How do I stop TCP reset packets?
Full story: This has been quite the odyssee, finding out who is sending these TCP reset packets. The isp pointed me in the direction of the minecraft server, the minecraft server said it has to be the ...
- 101
16
votes
6
answers
8k
views
Why don't we have a usable IP address in 127.0.0.0?
From theory, each part of an IP address is a number between 0 to 255 (256 usable slots in total).
But why is 0 not used in any IP addresses in their 4th part and they always start from 1 in IP ...
- 633
-1
votes
1
answer
545
views
How do computers know how to use TCP
I'm asking from a Windows perspective but any perspective is great.
Are NICs all a computer needs to interface with TCP? Wouldn't they also need some sort of software associated with TCP, or is that ...
- 45
0
votes
1
answer
218
views
is "Empty reply from server" a deliberate reply, or a default one from the TCP/IP stack?
I have a device whose port 80 is open and I was wondering what is behind:
~ # curl -v http://192.168.10.253 root@srv
* ...
- 3,263
1
vote
0
answers
84
views
How do Flow Control and Congestion control work together?
I am trying to learn about Flow Control and Congestion Control in TCP.
So far I understand that flow control uses the sliding window method and the receiver advertises a receive window based on how ...
- 13
0
votes
1
answer
101
views
How is network congestion detected in TCP?
I am trying to learn about Congestion Control in TCP and in this video (at 1:56), he says if there is no ack received, it assumes network congestion and cuts back the cwnd, no where he mentions about ...
- 135
0
votes
1
answer
530
views
Wifi-Lan Port blocking
I'm writing a paired (windows) server and (android) client application suite that uses TCP connections over wifi on a funny port number. The Server advertises its availability using Bonjour/Zeroconf.
...
- 105
7
votes
1
answer
12k
views
Practical (vs theoretical) max limit of TCP packet size
I'm a web developer who is pretty new to the industry.
I was presented with a coding challenge for a job interview where I need to design a messaging system and architect a system for how it deals ...
1
vote
0
answers
195
views
RST hijacking good ACK number
I'm trying to perform a RST hijacking sur on my Virtual Machine. I have 3 Vm's:
-attack : 172.10.10.11
-victim : 172.10.10.21
-pirate : 172.10.10.31
First, I connect from attack with telnet to the ...
- 13
0
votes
1
answer
49
views
identify individual devices from aggregate traffic of router
Is it possible and if yes how to identify individual devices (laptop vs. mobile phone vs TV) when listening to the aggregate traffic of a wifi router?
Assumption: all devices of interest are ...
- 151
0
votes
1
answer
49k
views
Why am I getting "No route to host"?
andrew-mx-02.andrew.cmu.edu is an MTA. It is unlikely to have a web server running.
I telnet to this host on port 25 and I get the mail server's response.
On an Ubuntu or Debian machine, when I ...
- 1,277