Recent questions tagged networking

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networking - How to calculate packet time from latency and bandwidth

I have a link between a host and a switch. The link has a bandwidth & a latency. How to calculate ... /laws of calculating these problems. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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networking - Is there a Python library than can simulate network traffic from different addresses

Is there a python library out there than can allow me to send UDP packets to a machine (sending to localhost is ... but can't find it anymore. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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644 views

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networking - iPhone active network type (2G, 3G, WiFi)

Does anyone know how to determine the active network type at the specific moment: 2G, 3G or WiFi. For example, ... network type could be 2G. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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471 views

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networking - What is the relation between docker0 and eth0?

I know by default docker creates a virtual bridge docker0, and all container network are ... /20150527/e84946a8e9df0ac6d109c35786ac4833.png See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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446 views

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networking - iphone SDK detect Wifi and Carrier network

my app accesses the internet and i just want to detect whether there is a connection either via wifi or via ... connection ) Appreciate ur help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

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networking - Path of UDP packet in linux kernel

I want to find the path of a UDP packet in the Linux kernel. For this, I want to read up on some ... ? Do you have any suggestions/references? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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627 views

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networking - How do I use cygwin behind the corporate firewall

I'm in a Microsoft IE environment, but I want to use cygwin for a number of quick scripting tasks. How ... information that IE and firefox use? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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848 views

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networking - Does TCP send a SYN/ACK on every packet or only on the first connection?

I have a TCP server that listens for an incoming client, then sends it one packet of data every second. I was ... over a long period of time? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

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networking - How can I determine network and broadcast address from the IP address and subnet mask?

For example: IP Address: 130.45.34.36 Mask: 255.255.240.0 What would be Net ID/Subnet Address, and Broadcast Address? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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445 views

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networking - Access HTTP response as string in Go

I'd like to parse the response of a web request, but I'm getting trouble accessing it as string. func main() ... but it's not really helpful. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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466 views

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networking - How to redirect DNS to different ports

TL;DR: DNS resolution of a domain(s) must map to IP:port(s), instead of just IP. Example, sub1.example ... that I may assume about the internet. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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398 views

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networking - Caveats of select/poll vs. epoll reactors in Twisted

Everything I've read and experienced ( Tornado based apps ) leads me to believe that ePoll is a natural ... is epoll still the champ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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529 views

1 answer

networking - what is a socket? Is it a process?

I am studying os concepts and I found socket as the end point of communication. Now what exactly is a ... system communicates? Thanks in advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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474 views

1 answer

networking - networkOnMainThread Exception Android

I'm trying to access a server so I can receive a JSON String. But apparently in Ice Cream Sandwich you can't ... . Anyone know how to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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417 views

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networking - Which port number should be used for network example code?

I've written a little Haskell network example, but i don't know, which port i should use. i couldn' ... number in the programming community. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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719 views

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networking - how to check computer's state using Qt?

i'm trying to get computer's state in my LAN... thought about using QTcpSocket but it's not realy ... check if computer is responding ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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538 views

1 answer

networking - Google Cloud virtual machine instance created from snapshot not allowing ssh

I have created a virtual machine instance from snapshot taken the production server. SSH key is set. But I am ... up lo Image of the error See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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908 views

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networking - iOS 13.2 message: nehelper sent invalid result code [1] for Wi-Fi information request

My app uses locationservices for tracking and geofencing in the background. Now with iOS 13.2 I see every second the ... can do to supress it ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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415 views

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networking - Scan for available Wi-Fi networks on BlackBerry

Is there any RIM API available which will help to get the list of available network service or only Wi-Fi networks ... it will be very helpful. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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479 views

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networking - (iphone) reachability test for specific ip/port?

I've looked at Reachability sample from apple and another sample from "Iphone developer's cook book" Here are ... reachability at all) Thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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400 views

1 answer

networking - Using telnet in a C Program

I am working on a robot automation project and I have run into a road block. To control the robot, one needs to ... in a C program? Thanks! Erik See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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538 views

1 answer

networking - How do I make a TCP server work behind a router (NAT) without any redirection configuration needed

The scenario is the following. I have two machines A and B: A: Client (behind NAT) B: Server (behind ... the user having anything to configure? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

networking - C# Connect to Wifi Network with Managed Wifi API

i was wondering if it is possible to connect to a wifi network with the Managed Wifi API? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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621 views

1 answer

networking - How to ssh to localhost without password?

EDIT: Putting exactly what was done I need to SSH localhost without password, the usual way of doing it ... password user@localhost's password: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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474 views

1 answer

networking - What is the upper limit on the number of open sockets I can have in Windows Server 2003

I'm building a chat server with .NET. I have tried opening about 2000 client connections and my Linksys ... connections with fewer resources? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

614 views

1 answer

networking - Checking cellular network type in iOS

I am working on an iOS app, and want to determine which type of cellular connection the device has. I'm most ... check for 2G, 3G, etc? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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600 views

1 answer

networking - Assign ipv6 address using ioctl

I'm trying to assign an IPv6 address to an interface using ioctl, but in vain. Here's the code I used: ... to assign IPv6 address using ioctl? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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646 views

1 answer

networking - Python, How to get all external ip addresses with multiple NICs

What is the most efficient way to get all of the external ip address of a machine with multiple nics, using ... best way to go about this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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