Questions tagged [protocol]

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151 votes
2 answers
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Why is X11 forwarding so inefficient?

Whenever I remotely launch large GUIs with X11 forwarding, even including the -C switch, the experience is very unresponsive. My question is, what does, at the concept/protocol level cause this? With ...
user129186's user avatar
  • 1,551
94 votes
8 answers
101k views

How do I configure custom URL handlers on OS X?

I've been reading a lot online about custom URL handlers / custom protocol handlers such as: Launching External Applications using Custom Protocols under OSX OS X URL handler to open links to local ...
cwd's user avatar
  • 18.1k
55 votes
6 answers
348k views

Enable TLS 1.1 and 1.2 for Clients on Java 7

Java 7 disables TLS 1.1 and 1.2 for clients. From Java Cryptography Architecture Oracle Providers Documentation: Although SunJSSE in the Java SE 7 release supports TLS 1.1 and TLS 1.2, neither ...
jww's user avatar
  • 12.1k
26 votes
4 answers
6k views

Is the order of e-mail recipients guaranteed to be constant?

When sending an e-mail, is there anything in the sending/receiving protocols that guarantees, or is supposed to guarantee, that anyone receiving the e-mail will see the lists of recipients in the To ...
Janus Bahs Jacquet's user avatar
23 votes
1 answer
3k views

Why aren't messaging apps created like email and sms, where you can send messages between multiple service providers? [closed]

I can send emails from GMail to YahooMail or to ProtonMail etc. I can send SMS'es to any mobile number irrespective of whether the number is owned by Vodafone or any other telecom providers. ...
Nav's user avatar
  • 1,069
21 votes
7 answers
2k views

Does the meaning of the term WWW mean it has to be performed by HTTP servers- by definition? [closed]

The following is a question regarding correct terminology. Could the World Wide Web exist without HTTP? Is there any other application layer protocol that can serve WWW pages? Is HTTP an essential ...
SerG's user avatar
  • 441
19 votes
1 answer
5k views

What protocols does a typical home router use when talking to ISP?

My home router connects to the ISP via coax cable (Verizon FIOS or Comcast Xfinity, here in the US). Fitting into the OSI 7 layer model, what layer 1 (coax?) and layer 2(still Ethernet?) protocol does ...
QnA's user avatar
  • 491
18 votes
2 answers
2k views

Does https encrypt URLs, too?

This is fairly easy. If I go to https://webserver.com/someurl?a=b, will the someurl?a=b part be protected, or just the contents of the site?
Karel Bílek's user avatar
  • 1,512
16 votes
3 answers
22k views

Can Notepad++ be made to open file links in itself?

In Settings/Preferences, Notepad++ has an option on the MISC. tab under 'Clickable Link Settings' to the right, to Enable to open links found in the edited files. It underlines them and opens them on ...
n611x007's user avatar
  • 6,406
14 votes
1 answer
28k views

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 ...
voices's user avatar
  • 2,721
13 votes
8 answers
69k views

How do I know if a remote machine is using Windows or Linux?

Is there some way to run a command (such as ICMP message or another protocol), get a response from a remote machine (not on my own private local network) and analyze the message to find some evidence ...
Diogo's user avatar
  • 30.5k
11 votes
3 answers
179k views

What is Allow multicast from Broadband Network?

If a wireless modem router has the option Allow multicast from Broadband Network, what does this mean exactly? What risks are there to leaving it enabled and why would you have it enabled? I ...
PeanutsMonkey's user avatar
10 votes
1 answer
5k views

What is "Priority" and "Resource" in XMPP?

I don´t know if those are the names in english, but it spanish is "Prioridad" and "Recurso". I see this when I want to configure an XMPP client. In "Priority" I see that I have to put a number, and I ...
Megver83's user avatar
  • 257
10 votes
1 answer
26k views

Register custom URI scheme handler in Windows 10

In W7 and W8 I can execute an arbitrary executable from html just by registering handler in the registry as described https://msdn.microsoft.com/pl-pl/library/aa767914.aspx#app_reg Similarly as ...
matcheek's user avatar
  • 197
9 votes
1 answer
2k views

Can a Telnet server detect the client being used through the protocol?

While web browsers send, among other things, the User-Agent string, does the Telnet protocol have a similar method of determining anything about the client connecting to it? OS? Specific Telnet client?...
Thufir's user avatar
  • 1,610
7 votes
2 answers
933 views

Why some standards are called Request For Comments? [closed]

Is it just historic name or it has some real ground? Should I use the term "request for comments, RFC" when putting some document just to receive comments, not to establish a standard?
Vi.'s user avatar
  • 17.2k
6 votes
1 answer
40k views

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 ...
oleksii's user avatar
  • 850
6 votes
1 answer
4k views

Small home network/ Spanning Tree Protocol?

I am installing a small SOHO router/switch and connecting it to two other switches elsewhere. Do I need to worry about setting up Spanning Tree Protocol for best results?
Axxmasterr's user avatar
  • 7,918
5 votes
3 answers
10k views

Why does "//" instead of http or https before the actual link work?

I just noticed that I can write //google.com instead of http://google.com and it still works. Is that some kind of short-hand? Maybe it's something that's built in my browser (Chrome 14)? Is it safe ...
daGrevis's user avatar
  • 237
5 votes
3 answers
5k views

What are the advantages of wireless networking protocols 802.11 a,b,g, and n?

I'm looking at a laptop purchase and considering whether to pay more for a card that does 802.11 n as well as 802.11a,b,g. All the pulic networks I see always run 802.11b. I know a and g have more ...
Brian's user avatar
  • 295
5 votes
1 answer
23k views

how to test ntp servers as real servers that responding without using ping test

we have bash script that configured the chrony.conf script check if ping is ok on ntp1 and ntp2 ( ntp servers ) and then script insert the ntp servers to /etc/chrony.conf ( only if ping success ) ...
King David's user avatar
5 votes
2 answers
11k views

Why do Jumbo Frames hurt latency?

Recently I've been reading about jumbo frames and I got confused in a few places. As far as I understand there is a lower bound on the Ethernet frame size between 'store and forward' points (layer 2 ...
Maja Piechotka's user avatar
5 votes
1 answer
7k views

How to remove an URL protocol default handler

I'm working on an application which should handle particular URL types (liked ed2k for emule or magnet for torrent). Recently, I decided to change this URL type from abcd to a more speakable word. ...
Joe's user avatar
  • 51
5 votes
2 answers
4k views

Low latency keyboards - are they for real?

Having just seen some commercial or other I just realized there could be such a thing as a high-latency keyboard—as compared to a low-latency keyboard. If so, then maybe a low-latency one could be yet ...
user avatar
5 votes
2 answers
1k views

IM protocol with message receipt confirmation

Is there any instant messaging protocol (or plugin for Pidgin) that uses a read receipt layer to verify whether messages have actually been delivered and resend if not? I've had problems recently with ...
wes's user avatar
  • 745
5 votes
2 answers
13k views

How can I disable the file:// protocol in Firefox?

How to disable file:// protocol in firefox I want the users not to browse the local files on the machine. I already disabled SaveAs and OpenFile functions. I want user not to browse the local files ...
Ammroff's user avatar
  • 81
5 votes
1 answer
4k views

How to associate the mailto protocol with a custom exe?

In Windows 8, How do you set the default program for the mailto protocol to a custom exe? Under Default Programs, the only option I get is to select from a list of programs (Mail or Google Chrome) or ...
msbg's user avatar
  • 1,931
4 votes
3 answers
2k 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 ...
Andrew Cheong's user avatar
4 votes
1 answer
7k views

Where can I associate the magnet protocol in Firefox?

I am not able to associate magnet protocol in FF. I am using Ubuntu 11.10 with FF 10.0.2. Created the following in about:config and restarted FF, but still getting the below message. Boolean Name: ...
Praveen Sripati's user avatar
4 votes
1 answer
2k views

Is the SSID for wireless routers part of the link layer in the internet protocol suite?

Ethernet, DSL and other cable connections for computers using them are links in the Internet Protocl Suite, but I do not see the link layers referring explicitly to wireless communication. What are ...
Vass's user avatar
  • 1,399
4 votes
1 answer
8k views

ftp server file size difference vs actual file size

I am connecting to an FTP server to download some gzipped files and I noticed something a bit disconcerting about the SIZE command and my google-fu has failed me. ftp> size file0001.xml.gz 213 ...
Mahmoud Abdelkader's user avatar
4 votes
1 answer
3k views

What are the 'chrome:' and 'resource:' protocols in Firefox?

From reading the error console, I've noticed that Firefox has several internal protocols, such as chrome: and resource:. What are they used for, and why are they necessary? Are they part of the ...
bwDraco's user avatar
  • 46.1k
4 votes
2 answers
5k views

Associate FTP hyperlink to filezilla

Is it possible to associate a link like ftp://myftpserver.net to launch automatically Filezilla and display the FTP server content with one click? I think there must be a kind of protocol registration ...
Martin Delille's user avatar
4 votes
2 answers
3k views

What are the general differences between a format and a protocol

I am still unsure about the distinction. I know that formats have definitions for symbols that represent data and how data is structured.
user3324945's user avatar
4 votes
1 answer
165 views

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 ...
Hassan's user avatar
  • 563
4 votes
1 answer
6k views

Open VLC when clicking certain video links

Is it possible to open VLC to play certain video files when I click on specific links? For instance, is there a protocol I could use, like vlc://, which VLC would recognize? Specifically, I've got ...
Gary's user avatar
  • 1,280
3 votes
4 answers
4k views

Can a computer respond to ICMP request if no OS is installed/ is soft-powered off?

I googled and found out that ICMP does not belong to the application layer. Does this mean that even no OS is installed, a network card still knows how to reply an ICMP request? Another situation is,...
bobo's user avatar
  • 1,829
3 votes
5 answers
16k views

What's the difference between broadcast and multicast?

I'm sending a packet indiscriminately to other clients on my network. Is this broadcast or multicast? If you're in a Jabber chat room and you send a message to the room, is this broadcasting or ...
mooep's user avatar
  • 573
3 votes
2 answers
8k views

What is the difference between a VoIP phone and a SIP phone? [closed]

I was under the impression that SIP is a protocol for the initiation of communication between applications, and that the protocol VoIP is for the transmission over an established pair of IP addresses ...
Vass's user avatar
  • 1,399
3 votes
2 answers
2k views

What are ping packets made of?

What exactly are in the packets that are sent via the ping command? I was reading a Wikipedia article about magic numbers and saw this: DHCP packets use a "magic cookie" value of '63 82 53 63' at ...
Wuffers's user avatar
  • 19.2k
3 votes
2 answers
1k views

How to use local filemanager to do a ssh -J (jump, gateway)

This is what I am trying to do. I want to connect to a server C, using a local file manager (nautilus, nemo, pcmanfm). I used to do this just writing sftp://username@ServerC in the location bar, or ...
Andres Navarro Alsina's user avatar
3 votes
2 answers
3k views

Router receives two routes from different routing protocols

A router receives two identical routes from different routing protocols. Which route is put into the routing table? I have been asked this question. A router can only have one protocol active at a ...
user2018084's user avatar
  • 2,134
3 votes
4 answers
26k views

Opera's problem with magnet-links

I've encountered following problem while using Opera web browser: When I click on a magnet link on some web page like magnet:?xt=urn:tree:tiger:CXW6MJFRNOEFU2STCBWWOIYZLVCR2FTR37SQCXY&xl=...
okutane's user avatar
  • 71
3 votes
1 answer
8k views

How to consistently get USB 3.0 connections to multiple external hard drives from a single USB 3.0 port connected via a USB 3.0 hub?

I have a simple task that I am trying to accomplish: attach two USB 3.0 external bus-powered platter-based 2.5" hard drives to a single USB 3.0 port and have them both operate at USB 3.0 speeds. To ...
End Anti-Semitic Hate's user avatar
3 votes
1 answer
18k views

How to get Chrome to accept a custom protocol handler

I can get my web app to have Chrome register a custom "web+" protocol handler such that it shows up under Settings->(Advanced)->Privacy->Content Settings->Handlers->Manage Handlers. However, it shows ...
Brett Zamir's user avatar
3 votes
5 answers
32k 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 ...
Jonas's user avatar
  • 27.5k
3 votes
2 answers
182 views

How does HTTPS avoids the key for encryption to be sniffed in the first place?

When a 2 computer establish an HTTPS connection them have to resolve what key is going to be used, right? So, to do that, at some point the key have to travel unencrypted from one computer to another,...
Zequez's user avatar
  • 1,642
3 votes
2 answers
6k views

What does this UDP Packet mean?

I'm total newbie at tcp/ip and I was experimenting with Wireshark. What this mean: 1824 578.194204 xxx.xxx.xxx.xxx yyy.yyy.yyy.yyy UDP Source port: 17500 Destination port: 17500 In data I can ...
user avatar
3 votes
1 answer
1k views

Prevent Brave Browser from asking for confirmation to open external application every time

Need to disable Brave Browser to ask for confirmation to open external application every time. Every time I click a phone number, in my use case for example, I get this popup again. The solution used ...
superuser's user avatar
  • 3,508
3 votes
1 answer
772 views

Is the Miracast protocol a practical equivalent of an HDMI signal?

Miracast has been described as "HDMI over WiFi"†, and as such I've recommended it to a couple of people asking about HTPC setups when unable to run wire. After giving it more thought, I'm ...
Louis Waweru's user avatar
  • 24.6k