Questions tagged [network-protocols]
The network-protocols tag has no usage guidance.
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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 ...
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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...
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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 ...
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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 ...
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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 ...
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SSL protocol seems to be missing in Wireshark
SSL protocol seems to be missing for me. It doesn't show up in the preferences menu and Wireshark doesn't capture any SSL packets from any program I try. I also had a failed handshake trying to just ...
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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 ...
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What protocol does TeamViewer use?
I was just teaching someone a little about SSH & VNC. I said I'd show him some things with TeamViewer. Then he asked me "Soo.. is this a VNC client?
And I wasn't sure.
What protocol does ...
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How does the protocol "mongodb" work?
To connect to a MongoDB database from a NodeJS application, the documentation says to connect an address like this one:
mongodb://localhost:27017/myproject
where mongodb is the protocol, in place of ...
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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 ...
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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 ...
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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, connection-...
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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.
Code King
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Which protocols are used for network share access
I want to figure out how to audit file access on Windows using network share access.
I have 2 computers that run Window 8 and that are not in joined in an active directory domain. Computer 1 has ...
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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 ...
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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 ...
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How to make Firefox use HTTP/1.1
There is this webserver in Python (code see end of post). Whenever Firefox connects, the webserver reports HTTP/1.0.
*.*.*.* - - [17/Feb/2016 15:50:59] "GET /?size=100 HTTP/1.0" 200 -
With wget, ...
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Why do DHCP clients leave the port open after the lease now?
I've noticed on some embedded linux systems that both dhcpcd and systemd-networkd leave the DHCP client port 68 open after the lease has been acquired. The fact both systems do this indicates it's a ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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Is there a program that would make it easier to look at how network protocols work? [closed]
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 ...
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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 ...
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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 HTTP and FTP works or the differences between TCP and UDP, but I never studied much of the ...
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Is a DNS packet with only a header (no questions or resources) valid?
Looking at RFC 1035 I am trying to determine what the proper response is for a packet that contains nothing but a DNS header, where all the "counts" are zero:
id short X
qdcount short ...
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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 ...
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Whats the technical difference between sending a webpage request and sending an email?
I need some clarity on this topic.
Here is what I understand: a webpage request initiates a DNS lookup and once domain name is resolved into an IP address, browser sends a request to that IP address ...
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In which protocol web server talks to CGI?
I'm wondering what protocol is used for communication between
web server, e.g. Apache, Nginx and CGI, e.g. FCGI, UWSGI?
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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 ...
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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.
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How exactly do two powerline adapters search & connect to each other?
Could someone please explain how exactly two powerline adapters "search" and "connect to" each other?
(As far as I know, the manual pairing of two adapters is only necessary to exchange the ...
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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 ...
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How to read and interpret Packet Formats in RFCs (Request For Comments)?
Often times when I am reading Request For Comments documentation, I always see the packet format section for a protocol outlined like the one below. My question is what do the numbers and different ...
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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 ...
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What does "leo://plh/" mean as part of a URL?
Someone shared a link with me, which goes nowhere. The user was on a mobile device, and the link was sent to my Gmail account. I've asked if I can share the original link (might be sensitive) and ...
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TeamViewer ID: how is the ID used to identify the computer across the Internet?
This video mentions that the TeamViewer IDs used to identify PCs for remote assistance or control to a computer are unique identifiers based on the hardware configuration found on each computer. How ...
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Is the sound quality of wireless earbuds inherently limited? [closed]
There are many different types of devices that emit sounds directly to the ear, ranging from the wired headphones often used by audiophiles —I presume— to the wireless earbuds often used ...
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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 ...
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Redirect OR warn (during initial negotiation?) SMTP submitters to use TLS on port 587 - leave 25 explicitly blocked by firewall for better security
This question went over poorly on S.F., but as I said there I've managed to find a lot of closely related information, but not an answer truly addressing my question.
I am expanding on my homelab ...
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FTP/FTPS looks like it's gradually being deprecated. What are Windows + browser clients moving to and what should I provide instead? [closed]
In the past I've used FTP over TLS to let non-technical friends and family remotely access important files on my server.
I've just found that they can't do so using Firefox any more, and the firefox ...
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WSL2 cannot connect to the Internet when Sangfor aTrust is running
I am using WSL2 on Windows 11 22H2 22624.1470. Ubuntu 22.04.6 LTS installed on WSL2. When I run a program called aTrust, which is developed by a corporation called Sangfor, my WSL2 cannot connect to ...
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How can I capture and analyse LTE packets using Wireshark and LTE modem? [closed]
Is it possible to analyse LTE packets using Wireshark. I'm having trouble using Wireshark to capture mobile LTE traffic. I ma using a MacBook and a LTE modem.
Do I need specific configuration to ...
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How to convert IMAP to POP3
I have an email server that only have IMAP interface. On the other side, I have another Special-purpose mail client (a kind of embedded system) that only accepts POP3 protocol.
How can I connect the ...
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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 ...
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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 ...
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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 ...
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Many sites claim they aren't capable of viewing subscribers' passwords. How does this work? Is it mandatory? [closed]
Many sites claim they aren’t capable of viewing subscribers’ passwords. How does this work? Is it mandatory for websites which allow users to log in? Are there any protocols or laws which obliged them ...
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