TCP stands for Transmission Control Protocol and is one of the core protocols of the Internet Protocol Suite. TCP complements the Internet Protocol (IP), and therefore the entire suite is commonly referred to as TCP/IP.

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Software using Socket Based TCP connection cannot connect to server

On my computer other network based software are able to connect to servers and I am able to surf the internet as well on this computer however there is a software that uses socket based tcp connection ...
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Size of an IP Packet

What is the complete size of an IP Packet?
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What's the minimum size of a TCP packet

A post here: http://blogs.adobe.com/dreamweaver/2011/02/optimal-css-tiled-background-image-size.html staes that "The smallest download that browsers can do is 1K bytes." Is this due to minimum size ...
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Comparison: UDP vs TCP [closed]

UDP vs TCP. What are these ? What are their Differences, pros and cons ?
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What does netstat mean by “acknowledgments not containing data received”?

Netstat reports some TCP packets in the following category acknowledgments not containing data received. However, I'm not clear what this phrase means. Goggling and the netstat documentation don't ...
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54 views

Which element of network refused connection

How could I determine, which element of the network actually refused/closed the connection?
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437 views

Add new port forwarding entry (TCP) on iMac

I'm on an iMac, Leopard OSX, and I need to add a new port forwarding entry (TCP protocol) in the iMac itself, since I have no router/modem connected to the iMac, I have Fiber, a network cable from the ...
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Finding all processes that are using a given port [duplicate]

Possible Duplicate: Finding the process that is using a certain port in Linux More specifically, how can I find out what processes are using port 8080 (for example a web server)?
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ICMP protocol place in network layers

I would like to ask you question about Internet Protocol. On Wikipedia, they have ICMP protocol on the same level of network architecture as IP protocol, but that is wrong, right? ICMP should be on ...
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HP G61 Notebook: TCP seems to be dead

Can't say I'm much of a Windows expert, but this is somewhat of a weird occurence. I'm in front of a HP G61 Notebook laptop with Win7 that has connectivity problems. I mean that it's connected to the ...
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15answers
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How do I kill a process that is dead but listening?

I'm developing an app that listens on port 3000. Apparently there's an instance of it still listening to the port because whenever I start it, it can't create a listener (C#, TcpListener, but that's ...
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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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Examine open TCP connections on Mac

What is the Mac equivalent of TCPView or CurrPorts? I've never used Mac before, so I'm clueless.
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TCP behavior on Mac OS vs Ubuntu

The following process results in different behavior in Mac OS and Ubutu: cat some_text_file | xargs a_shell_script.sh a_shell_script.sh #!/bin/bash echo "$@" | telnet 127.0.0.1 123 exit 0 The TCP ...
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Other PCAP network software other than TCPREPLAY?

I would like to find out if there are more other useful softwares with the same functions or more like TCPREPLAY which has the ability to "playback" PCAP files? Thanks for your suggestions!
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How to analyse the results of a netstat command on Windows, as during the night my internet connection slows down?

My internet connection gets very slow at night and my ISP told me to use netstat to see how many tcp connetions there is there is usually about 30 or more with ether time wait established but I also ...
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Manually forcing TCP connection to retry

I have a TCP connection (SSH session to some computer for example) Network suddenly goes down and drops all packets (disconnected cable, out of range). TCP resends packets again and again, retrying ...
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Is it possible to add tcp autotuning to windows xp?

I have a network application that needs to send messages at 60 times a second. The messages are usually 300-400 bytes, but can be as large as 1500. The default setting for SO_SNDBUF is too small and ...
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Tcp Port Open by Unknown Service

Running openSUSE 11.2 x86_64. Here's what a nmap of my IP provides: PORT STATE SERVICE 23/tcp open telnet 80/tcp open http 2800/tcp open unknown 8008/tcp open http I would like ...
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How to know which protocol is used in data transfer and inspect that data?

I've a .net application for windows. This application transfers a lot of data to and from a particular server on a fix port no 8888. I tried 'Tcpview' but couldn't figure out anything useful. I only ...
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977 views

Can I use TCP as DNS query protocol on Mac OS?

I'm using Mac OS, Snow Leopard 10.6.2, and I'm suffering from UDP packet loss during DNS query. So my web browser is too slow to surf internet nicely. But it worked very well when I tried a DNS query ...
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(linux) tool to monitor “quality” of tcp connection?

I am looking for a tool to monitor the quality of a TCP connection. I am trying to describe what I mean: It should be a tool with a client and a server part. The client sends, say, 1kB of data per ...
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How does Router know where to forward packet

If several computers with local addresses (192.168.0.#) are connected to a router and each computer opens a web browser and requests a page over HTTP, when these TCP:80 packets are sent out, the ...
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shouldn't ping time be the sum of trace route hops time?

just the difference between them is confusing me...
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How do I establish a connection between 2 computers on different subnetworks?

computer A(192.168.1.134) needs to establish a UDP connection to computer C(192.168.0.30). As you can see both are on a different subnetwork. Now I have computer B which has 2 IP addresses, one for ...
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What do these remote addresses, local addresses, and states in TCPview mean?

I have been using TCPview lately to see what connections are made by different processes on my PC. Would somebody please explain what the following situations mean? Thanks. TCP Local Address: ...
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What does it mean when a portscan shows a port as “tcpwrapped”?

Interesting ports on 192.168.1.76: Not shown: 998 closed ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 5.2 (protocol 2.0) 62078/tcp open tcpwrapped I see tcpwrapper ...
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Why is it bad to have open ports?

Here's something that has always baffled me. Why is it bad to have open ports on your computer? Assuming you don't have a virus on your computer or some other program listening to a port that may ...
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528 views

What typically uses port 44380?

A company just asked me to open port 44380 in my firewall so that their software could work. This made me wonder... what is the customary use for port 44380?
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TCP Implementation on Mac OS X

How can I find the type of TCP running on my Mac OS X? (TCP Reno, Fast TCP, ...)
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5k views

Remotely push DNS server to client via OpenVPN

When I try to push a DNS server via the OpenVPN server-config I don't get that server to be the first DNS server on the connected client system. It ends up being specified as an alternative DNS ...
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Good process specific packet sniffer / viewer?

I am looking for a good, free or not free, packet sniffer. The main feature I am looking for is an ability to watch a chosen process and view / read all of the data it is sending or receving. Also I ...
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What does “On-link” mean on the result of “route print” command?

I'm using Windows 7. When I type "route print" under command prompt, I get a IPv4 Route Table with several "On-link" values under the Gateway column. For example, like this one: IPv4 Route Table ...
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1answer
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Is there a half-open TCP connection limit in Win 7?

Or at least, is it a low limit like 10 or 50? It was present since XP SP2 (I think), and was finally cancelled (= I think now the user can set the limit manually) in Vista SP2. What is the current ...
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TCP Tweaking options and Results: Any suggestions?

I first tried with the default windows XP TCP option(It doesn't have TCPWindowSize option and TCP1323 in its Registry setting). I dynamically set those options using TCP optimizer. Here I list out the ...