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0answers
22 views

CANopen to usb?

OK i have one of these: http://nikivita.com/website/datasheets/t40.2055gb.pdf that outputs a CANopen signal. What is the best way to get the data via a USB port on my computer can I just wire the ...
0
votes
1answer
8 views

Do faulty 100mb half-duplex connections flood a subnet with collision traffic?

I'm on a subnet where a lot of machines are falsely getting set to 100 megabit half-duplex connections. Could this potentially slow down other machines on the network that have proper full-duplex ...
2
votes
1answer
62 views

how to see all network requests made by an application [duplicate]

Suppose i have an application running abc.exe, how to see all the network requests made by this application? Wireshark is good to see all the requests from the pc, but is there any filter for requests ...
0
votes
1answer
31 views

GitHub with HTTP protocol

I read that HTTP, aka http://github.com Doesn't work with GitHub anymore However it seems to work for me $ git clone http://github.com/antirez/redis Cloning into 'redis'... remote: Counting ...
0
votes
1answer
47 views

What is the Discard Protocol actually used for?

What is the Discard protocol used for?
7
votes
2answers
969 views

FTPS versus SFTP versus SCP

I would like to know exactly what the difference is between the following protocols: FTPS, SFTP, and SCP. For instance Unix has an scp tool, FileZilla offers FTP and SFTP, whereas JetBrains PhpStorm ...
3
votes
3answers
214 views

Is it possible for a BitTorrent client to give seeding preferences only to leechers who are also seeding?

I'm not very familiar with BitTorrent on a protocol/technological level. Is it possible for clients to prefer seeding (give more bandwidth, or only connect at all) to leechers who are also seeding ...
-1
votes
3answers
26 views

who provides the tcp/ip functionality? [closed]

TCP/IP is a suite of protocols(telnet, ftp, smtp, DNS, RIP etc) ex: DNS is a domain name server which converts the given website address to the ip address and sends to the default gate way for ...
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vote
4answers
2k views

Custom Protocol Handler not working in Chrome on SSL page

I've successfully created and registered a custom protocol handler in my web application and it's working fine in all browsers. There's the initial warning dialog about launching an external ...
7
votes
1answer
925 views

Using HDMI port as network protocol interface?

I was wondering if it's possible to use the 10.2 Gb/s HDMI port on several computers as a backbone networking interface for a home made cluster? Is there some kind of HDMI switch? Can HDMI transport ...
2
votes
0answers
74 views

Do you know what protocol is this?

I have a H.264 standalone DVR from Hexacctv that streams 4 channels from its cameras. I use SkyVizor NVClient to get streaming video from channels. But I need to be authenticated by the the StandAlone ...
0
votes
1answer
241 views

How does a proxy know where to forward the requests to?

When a proxy receives a connection how does the proxy know where to forward the request to? For example in Java we can set a system property for proxy. So we set the IP of the proxy and the request is ...
0
votes
1answer
120 views

Can gnunet-0.8.1 (2 yrs old) be used and useful?

I've configured and started gnunet-0.8.1-alt1.M51.1 service on my system (the reason I use a more than 2 years old version is that the system is an old installation of ALTLinux 5.1, and I wanted to ...
1
vote
2answers
2k views

Why is my UDP so slow?

I'm using Iperf on two VMs and when using TCP I find the performance is as follows: notroot@ubuntu:~$ iperf -s ------------------------------------------------------------ Server listening on ...
2
votes
0answers
638 views

tcp port numbers reused on wireshark

I used raw socket to build a tcp client program on machine A to reproduce tcp 3-way handshake with a simple regular tcp server on machine B I captured packets on the client host and server host, and ...
0
votes
1answer
68 views

sent packet is different from received packet

I use raw socket to create TCP packets, with focus on the sequence number and TCP flags(SYN, ACK) I used one machine S to send a tcp ACK packet (flag ACK is set to 1) and another machine R to receive ...
14
votes
2answers
938 views

If two devices are emitting a wifi signal in the same frequency at the same time and reach an antenna at the same time, how can the data not overlap?

I mean, I know each packet is sent with a MAC address, but what about streaming? What happen if while the router is receiving one packet, a packet from another device arrives? How can the router ...
0
votes
1answer
357 views

Copying files over home network (windows 7 laptops) is super slow

I have two Windows 7 laptops (one Dell and other Toshiba). I have a shared folder on the toshiba-pc, and both are connected to a wireless router. When I copy a large folder from toshiba-pc to dell-pc, ...
1
vote
2answers
499 views

How does an adsl modem discover the network upon physical setup?

I have some basic knowledge about protocols and the OSI model, i know for example a good deal about how the HTTP works and how FTP works or the diferences between TCP and UDP, but I never studied much ...
4
votes
1answer
115 views

Is there a program that would make it easier to look at how network protocols work?

I'm interested to know more about how certain network protocols work (like SSH or FTP for example). Is there a program that can facilitate connecting to computers on the network and communicating with ...
2
votes
1answer
1k views

How do I figure out if my wireless network has WEP, WPA or WPA2 security via command prompt on Windows XP?

I understand how to check what security protocol my wireless network connection is currently using by going to the Wireless Network Connection window like in the following example but how does one ...
0
votes
2answers
516 views

How to use specific proxy address for specific application in Windows XP?

I have a chat client application. When I connect to internet & chat with other person via that application, the application uses the IP of my ISP to connect to internet & transfers data via ...
3
votes
4answers
285 views

How do Internet (ISP/AS) routers send IP packets to each other

I know how computers in a LAN communicate with each other (all the Ethernet/MAC address/NAT etc stuff), but I wonder, how do Internet routers communicate? Are they connected into some kind of giant ...
2
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0answers
51 views

Most network protocols occasionally fail

My Windows 7/64 machine has suddenly started to act funny. Everything will be running fine, when suddenly most network access methods will fail. These things continue to work: Accessing network ...
0
votes
1answer
154 views

Why does Knoppix mess up my internet connection?

I have this problem that when I boot Knoppix on my Windows box, it screws up the internet connection somehow, so Windows cannot get an IP when I reboot back to XP. I use Verizon FIOS. Normally I have ...
4
votes
2answers
204 views

What protocols did the ARPANET use?

The ARPANET is often mentioned as the Internet's precursor. But what protocols did it run with if not TCP/IP?
1
vote
1answer
187 views

Unknown Inbound UTP Packets

I need some help figuring out something. I was looking at my network traffic using Wireshark and I saw a bunch of inbound UTP (uTorrent Transport Protocol) packets to my IP. About 10 different IP's ...
3
votes
1answer
4k views

Chrome doesn’t handle custom protocols correctly

For example, if I enter steam://connect/127.0.0.1 in the Omnibox, it will search for the URL instead of launching the program that handles that protocol. How can Chrome be configured to treat custom ...
1
vote
2answers
264 views

Why is there an interface field in routing table?

Imagine that we have an IP-packet, and we need to figure out which interface it should be sent through. There is an eth0 (for example) corresponding with our packet destination address. But what if ...
1
vote
3answers
92 views

In which network layer is the data located that lets a gateway(using NAT) know which computer a packet is meant for?

Main questions: In which network layer is the data located that lets a gateway(using NAT) know which computer a packet is meant for? Could someone explain how the process works? In explaining the ...
1
vote
3answers
195 views

Why do I not get to the same website when using this IPv4 address instead of the url?

When I capture packets using the packet analyser wireshark while visiting http://en.wikipedia.org/wiki/Hydrogen I can see packets that use the HTTP protocol (e.g.a GET request). My Get request uses 4 ...
1
vote
1answer
8k views

What does `Type: IP (0x0800)` in the Ethernet II part of a ping packet mean?

If I ping to another pc in my network I send a packet that consists out of an ICMP part, a IPv4 part and a Ethernet II part. I can see this using the packet analyser 'wireshark'. Now the Ethernet II ...
0
votes
1answer
269 views

Can two network adapters work in different IP protocols simultaneously?

My laptop has two network adapters, one is wireless and connected wirelessly to a wireless router, another one is wired and connected to a network supported IPv6 with cable. The question is , can I ...
0
votes
1answer
93 views

Implementation of protocols [closed]

I want to know how different protocols are implemented. For instance, take example of TCP/IP. This protocol is used for the transmission of data (if I am right). Now, I want to know how this protocol ...
1
vote
4answers
13k views

How do I limit packet capturing in Wireshark to only a specific protocol?

I would like to listen to HTTP traffic on port 8080. When I start capturing packets in Wireshark, it's flooded by packets using the SSDP protocol on port 1900. I would like to limit the packet ...
1
vote
2answers
641 views

Ethernet a protocol or cable?

Is ethernet a protocol or cable? How it is different from Cat-5 cables? I'm very confused when I hear the term 'ethernet' for a protocol and cables.
3
votes
2answers
18k views

How to download and install IPX on windows 7

From where I can download IPX for windows 7 and how to install it? Thanks alot for your help.
0
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2answers
45 views

Sharing internet connection.- Complex

Scenario 1 Desktop , 2 Laptops , one wifi router , one network cable . All computers are on win XP Laptop A and Laptop B are connect to the network of wifi Router, they can access internet. My ...
1
vote
2answers
274 views

What is `gopher` and is it still used?

Reading some rather old computer books, I have seen the gopher protocol mentioned frequently. What is it used for? And, is it still used today?
3
votes
3answers
882 views

What are ports and protocols really?

I hear people talk about ports and protocols (in relation to computer networking), and they often provide analogies for them (for example: "a port is much like a shipping port, it sends and receives ...
1
vote
0answers
158 views

Allow only HTTP/HTTPS comunication with Agitum Outpost Security Suite Free

Hi I use Agitum Outpost Security Suite Free and I would like allow only HTTP(80) a HTTPS(443) protocols for IN/OUT and also allow local ports for Oracle database, etc. I try use Network Rules -> ...
0
votes
1answer
110 views

IPv4 address to Netmask mapping and Multiple default routes feasibility?

We have, Class Range NetMask Bits Bits hosts# ---------------------------------------------------------- A 0-127 255.0.0.0 8 24 16777216 (i.e. ...
7
votes
4answers
770 views

Is there a good example for acknowledged, connectionless network protocol?

According to what I've read, there are three main connection types in computer networks: Unacknowledged, connectionless (e.g. UDP) Acknowledged, connectionless (e.g. ?) Acknowledged, ...
2
votes
2answers
252 views

CSMA/CD network protocol (Ethernet)

I hope I'm in the right stackexchange subsite (can't seem to find a networking related subsite..). I've got 2 questions concerning the CSMA/CD network protocol: Before sending some (say 5) messages ...
1
vote
3answers
249 views

How do I forward TCP from one IP to another?

Here's a thing: I have a piece of software listening on 127.0.0.1:port and only (I can choose the port). I want it to work as a server and accept connections from outer network. How can I forward the ...
9
votes
5answers
23k views

how does 'ping' command really work?

How does the ping command really work? Specifically where does the ARP (Address Resolution Protocol) come into picture? I was asked this question in an interview and I was not able to come up with ...
0
votes
3answers
4k views

How do I “telnet into [my] favourite Web server”?

I'm reading a book about programming, and I want to check an HTTP response message. The book is instructing me to telnet into your favorite Web server. Then type in a one-line request message for ...
1
vote
3answers
2k views

Finding the external (PPPoE, WAN) MAC address of an ADSL router

My ISP is Orange Internet, I have recently ditched my crummy "livebox" and moved to a more stable BT Business Hub with the firmware flashed back to the original SingTel ROM. The thing works great ...
15
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5answers
5k views

Ethernet vs TCP vs IP?

What is the difference between Ethernet, TCP, and IP in simple (simple abstract) terms? Please do not copy from Wikipedia...
0
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3answers
61 views

How does the home wireless perform if it connects to a public access point?

Assuming that there is a access point(hotspot) covering a dozen of houses. Besides, these houses also have their own wireless network. So, if everyone in each house connect to the Internet at the same ...