• How can I determine the size of a packet?

    I have initiated a TCP connection for a HTTP request and response. Now after it was completed, I sent a request to the server for the HTTP packet (with a SYN flag set). The server responded with a ACK flag but when that finished, it sent a FIN flag. So my question is: How can I figure out the size...

    ITKE62,460 pointsBadges:
  • Closing TCP and UDP ports using Windows command line

    Would anyone know of a way of closing a TCP or UDP socket for a single connection via the Windows command line? After doing some searching, many people said doing a manual page of NETSTAT or NETSH commands, which would monitor the ports. But I'm not looking to monitor, I'm looking to close/kill...

    ITKE62,460 pointsBadges:
  • What’s the complete definition for off_t type?

    I'm sending files from our client to the server using TCP. To end the mark of the file, I would like to send the file size before the actual data so I've been using the stat system call. Now I need to know how many actual bytes it occupies so I can read it correctly on the server. It's defined...

    ITKE62,460 pointsBadges:
  • Does a TCP send a SYN/ACK on every packet?

    I currently have a TCP server that always listens for an incoming client, then it sends one packet of data every single second. Bur I have a quick question: Does a SYN/ACK packet only get sent on initial connections, like this: SYN ACK DATA DATA DATA Or is it sent with every packet, like this: SYN...

    ITKE62,460 pointsBadges:
  • How to redirect TCP-traffic to Unix domain socket

    I have a legacy Linux application that's listening on a UNIX domain socket. Now, I'm trying to connect to it through a TCP-connection on a port (Port 1234). What would be the easiest way to bind the port and then redirect all incoming connections to the domain socket?

    ITKE62,460 pointsBadges:
  • Infiniband: How does IPoIB and TCP fit into it?

    I don't have a strong networking background but I've been doing some research on Infiniband. And I'm not quite sure how the concepts of IPoIB and TCP fit into it. Can someone explain to me how they work / what they do with Infiniband? Which way is better to go?

    ITKE62,460 pointsBadges:
  • Is it possible to use TCP and UDP on the same server?

    I understand this is a short question but it's very urgent. Can I use both TCP and UDP sockets on the same server? Particularly, would I be able to use the same port number too? Thanks!

    ITKE62,460 pointsBadges:
  • How to broadcast a message with UDP and TCP?

    I'm currently working on a .NET solution that runs completely inside a single network. So when a user makes a change to the system, I need to launch an announcement / have everyone hear it. Do you know of a way that I can broadcast a message like this (just like UDP) while keeping a guaranteed...

    ITKE62,460 pointsBadges:
  • Transmission of IP Packets in TCP

    I’ve read that IP packets can sometimes get lost in transmission and that TCP often requests retransmission of lost data.  How often are packets lost permanently?  What are the requirements for retransmission?  Are lost packets a security risk?

    ITKE62,460 pointsBadges:
  • How much faster is UDP than TCP?

    How much faster is UDP than TCP for a general protocol message exchange?

    ITKE62,460 pointsBadges:
  • How to manually close a TCP socket

    My partner and I currently have a Python app that opens A TCP socket that communicates with another Python app on a separate host. Every once in a while, we notice the program either errors or we kill it. When that happens, the socket is still open for some time. Every time after we go to run the...

    ITKE62,460 pointsBadges:
  • How can I open a socket in Python

    I'm looking to open a TCP client socket in Python and I need some help. Would I have to go all the way through the low-level BSD socket handle or is there an easier way?

    ITKE62,460 pointsBadges:
  • Why is a TCP Window Update is causing my server to crash?

    I'm making my own server software for a game in Java (everything was written in Java). A big problem I'm having is that I don't have any protocol documentation available so I've been reading packets with Wireshark. So, when a client is connecting, the server is sending it the level file in a Gzip...

    ITKE62,460 pointsBadges:
  • Why would someone use UDP instead of TCP?

    Aside from speed, why would someone use UDP instead of TCP? From what I understand, UDP can lose packets, whereas TCP cannot. What other advantages does UDP offer?

    ITKE62,460 pointsBadges:
  • Lacking a FQDN during database mirroring on SQL Server 2005

    I am trying to work with database mirroring on SQL Server 2005, and I keep receiving the error message, “One or more of the server network addresses lacks a fully qualified domain name (FQDN). Specify the FQDN for each server, and click Start Mirroring again.” I know that the syntax for a...

    SQL Server Ask the Experts2,585 pointsBadges:
  • How to set proper TCP buffer size?

    Hi, We have 3 AS/400 systems PR, HA (Both are on same physical location) & DR (situated in different physical location around 1000 KM away from PR system). All the three systems are in sync using MIMIX Global. We had 100 mbps WAN link configured for PR to DR replication. PR & HA replication...

    Ketan19305 pointsBadges:
  • Global communication network without the transport layer

    Is it feasible to have a global communication network without the transport later? Thanks!

    ITKE62,460 pointsBadges:
  • Packet Sniffer

    I need to know about packet sniffer with a clear demo and how the packets are transmitted in TCP and UDP.

    ITKE62,460 pointsBadges:
  • Wake on LAN / Magic Packet broadcast doesnt work through PPTP

    Hi, I have a network, where I want to use WOL from a remote PC. It works when I send a packet from inside the network (or on the server). If I connect via PPTP from a remote Windows XP PC, I can't wake up the PC on the LAN. I suspect the broadcast packet doesn't reach the LAN. The PPTP connection...

    Benbje0 pointsBadges:
  • Transfer a file by a batch job

    Hi, I want to transfer a file by a batch-job (which is running on the mainframe) from a mainframe to a windows system. The file should be transferred in binary mode. The problem is that I need the CR/LF at the end of the records in the file after I transferred the file to the windows system. Do you...

    Clitze0 pointsBadges:

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