All Questions
15
questions
0
votes
2
answers
1k
views
How to measure the latency to a webserver?
I wish to measure the TCP network latency from my Linux server, to a websocket URL.
I am using netperf like this:
netperf -H ws.the_websocket_url.com -l 5 -t TCP_STREAM -v 2 -- -o min_latency,...
- 219
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
2k
views
Traceroute/tracert fails to receive hops return information
I noticed that with some routers/gateways
when I issue a traceroute or a tracert in a 'inner' computer
the hops always fail with:
request timed out
can anybody clarify this?
what information goes ...
- 966
-3
votes
1
answer
151
views
why can't we just upload a file and it reaches its destination without the other device downloading it? [closed]
when we have to view or get some content off the internet. We have to download it
on the other hand the server uploads it
So here's my question => Why can't the server simply upload the file and it ...
- 165
1
vote
0
answers
35
views
All applications timeout when single, high-throughout operation running
My internet connection has a decent speed of about 15 megabits/s. However, whenever there is a high-throughout operation running (e.g. file download, dropbox sync..), this occupies the full bandwidth ...
- 111
4
votes
2
answers
4k
views
What TCP / network tuning should be performed in Windows 7 for best internet performance without reasonable risk of causing issues?
I'm wondering what network / tcp tuning should be done in Windows 7 to ensure best performance (yet without reasonable risk of causing issues). Here's what I have so far (the below commands get run ...
- 343
1
vote
1
answer
3k
views
Differences between TCP receiver and transmission window
After reading this question I'm still confused about the relationship between the receiver window and the congestion window in the context of TCP based communications.
The answer states that the ...
- 1,134
3
votes
2
answers
3k
views
Is the Transport Layer (e.g. UDP, TCP) handled by the Operating System usually? [closed]
I'm really new to networking and am struggling to understand this.
I know the Transport Layer in the Internet Protocol Suite (at least the UDP and TCP protocols) contains the source and destination ...
- 1,272
2
votes
1
answer
3k
views
Is it possible for a PC to use two net connections simultaneously?
We have two net connections in our office - a 10mb Wired DSL provider and a 3mb Wireless backup provider. The wireless is a backup, but it has the advantage of 3mb upload speeds whereas the wired is ...
- 692
1
vote
2
answers
615
views
Download resume support blocked by isp?
Can ISP block resume support for downloads ?
I'm using IDM (internet download manager) to download of the internet from resume supported websites, yet I am unable to resume downloads. I tried ...
- 11
4
votes
2
answers
6k
views
Hardware/Software behind IP/TCP layers encapsulation
Every tutorial I read talks about how the layers "communicate" with each other, but never mentions what hardware/software receives, adds on, and sends each layer of control data.
What piece of ...
- 346
10
votes
3
answers
5k
views
What do the numbers used in a IPV6 address mean?
I am trying to understand IPV6. I have a server with the following IPV6 address: 2607:f750:0:3f::f59.
I don't understand what the numbers mean. It looks totally different from an IPV4 address.
...
- 103
12
votes
4
answers
58k
views
TCP Retransmission vs. TCP Fast Retransmission
In Wireshark I can see things that say "TCP Retransmission" and "TCP Fast Retransmission." What's the difference? How is Wireshark able to tell the difference?
- 14.5k
1
vote
1
answer
1k
views
Server response in TCP 3-way handshake
A server normally responds with SYN ACK in a 3-way handshake.
What would happen if it just responded with ACK?
- 14.5k
4
votes
2
answers
5k
views
How to manually do a TCP handshake
Telnet can be used to manually do things that programs do automatically. When I connect to a server I noticed that it automatically does the 3-way handshake to establish a TCP connection. Can it be ...
- 14.5k