Transmission Control Protocol (TCP) and Internet Protocol (IP) provide end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination.

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Not able to connect to my computer via TCP/IP [on hold]

I am very new to Networking and I have a very basic problem while connecting to my computer. Actually I have written a server/client program using C#, I am able to connect to my server program within ...
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35 views

static IP not saving in LAN properties

static ip is not saving int lan tcp/ip properties i.e once I enter a static address with subnet mask, default gateway Etc.. it accepts the details, but then I close the dialog and when I come back in ...
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38 views

TCP packet issue with 802.11ac but not with 802.11n on an Android Nexus 6

I have an Android Nexus 6 that connects to my computer via an ad-hoc network. When my phone connects to the 802.11n card (TP-LINK 300Mbps Wireless N), the bytes are sent with no issue; verified with ...
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1answer
80 views

TCP congestion control Windows 7

Based on what I read, Compound TCP is disabled by default in Windows 7. If so, which default congestion control algorithm does windows 7 use? Is it TCP RENO or NEW RENO? Could you give me some links ...
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0answers
150 views

Cannot ping to default gateway from computer inside private network

I have one desktop PC, laptop and android mobile. I have created a WiFi hotspot on my desktop PC so that I can use my internet on mobile as well on a laptop and it's working great, but now I want to ...
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0answers
16 views

Is it possible to rewrite the IP packet on tunnel interface in Mac OS X 10.10 (Yosemite)?

I am trying to rewrite the destination address (to 127.0.0.1) of an IP packet received from a TUN/TAP interface on a Mac OS X 10.10 (Yosemite) machine. Will the kernel route the packet again to ...
3
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1answer
92 views

What happens when I terminate a process and the socket send buffer is not empty?

In Windows (and probably in other operating systems), if a process has a TCP connection with another process on another machine, and then I terminate the process, an RST packet will be sent to the ...
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0answers
30 views

Ekiga softphone shows as “registered” — but is it actually?

Is Ekiga actually registered? How would I know? I think Ekiga connects, or at least it says "registered": But, when I exit Ekiga, and use SFLphone, it fails to register: While sipsak shows a ...
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0answers
24 views

Check if ports are open for talking

I have a software (HP BSM) installed in a Windows server 2008 R2 Std This software needs to "talk" through a specific list of TCP ports and "listen" through other TCP ports. How can I know/check if ...
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21 views

Network lost when doing big transfers

normally my wireless network works fine but when I'm doing big (and fast) transfers the network stops working until I reconnect to the Access Point. Check the following screenshot taken after the ...
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0answers
200 views

Media State Says Media Disconnected, but I can still connect to internet

I tried to reset my ip address to resolve problems with connecting to the internet, but I've run into some problems. I can still connect to the internet, but I constantly run into the following ...
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36 views

tcp/ip route command has stopped working

I am getting this error "tcp/ip route command has stopped working" when I am trying to access my email through my TOSHIBA laptop. Actually, when I login, I am getting "This webpage is not available". ...
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1answer
494 views

The difference between data link layer and transport layer in tcp/ip stac

In TCP/IP protocol there are some alike functions at the data link layer and transport layer such as: flow control numbering reliability errors control Why there are the same functions in two ...
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1answer
263 views

how to setup a publicly hosted tcp/ip webserver to receive gprs packets(lat/long and other data) sent from a sim900A gsm module

I want to send the foll data (lat/long, date/time, velocity, deviceID) using gprs (tcp/ip connection) from a gps/gsm tracker i made (using sim900A as the gsm/gprs module). I know how to send data to a ...
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4answers
63 views

How can I check what is my ip on any particular endpoint?

I know I can do curl curlmyip.com or something like that, but that just shows me the ip curlmyip.com is seeing. Is there any tool I can use that tells me what's my ip on the endpoint for any TCP ...
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1answer
38 views

Is network packet synonym to IP datagram?

The word packet as in packet-switched network is often mentioned in context of various layers, from transport to link and I am slightly confused and I do not know what layer it refers to (if there is ...
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2answers
112 views

Can one TCP segment be fragmented into more IP datagrams?

In learning materials is often a picture of one TCP segment which is inside one IP datagram which is in one link-layer frame. Is this always the case? Is there guarantee that TCP segment is atomic ...
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0answers
41 views

How to get tcpip over usb on WinCE with Mips-II without rebuilding the OS?

I have a device with a "mini usb B female" socket, which runs WinCE 6.00, the cpu is MIPS-ii (mips-2 or MIPS32-au13xx). I'd like to use ethernet networking on the device, but since I have no network ...
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2answers
71 views

Can telnet be used with any application level text protocol based on TCP/IP?

Can telnet be used with any application level text protocol like http or smtp?
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0answers
110 views

How can I create Local Loopback on Linux (RedHat or Debian)?

How can I do the same on Linux (RedHat or Debian)? I need to create local loopback as shown herein: ...
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1answer
45 views

Add static IP to windows XP

In our office we have two internet connections. one for main use and one for backup. this backup connection equipped with WImax connection and cisco 800 series router.this is always ready to plug to ...
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1answer
200 views

Routers Upstairs / Downstairs, allow them to talk?

I recently installed another router upstairs because the downstairs one didn't reach via WIFI. The second router takes its WAN connection from downstairs (I only have 1 physical connection to the ...
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1answer
163 views

How to prove maximum concurrent connections limit in windows?

We need to verify that our clients (Windows Vista SP 2 and Windows 7) are able to open more than 10/20 connections. I found an answer which states the limit was removed, but without any source like ...
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1answer
113 views

How to block access to certain websites without additional programs?

Say I want to block "xxx-xxxx-xxx-xxxx" and that alone from being accessible from any web browser on the system. Is there any way to do that plainly and simply without having a need for bulk ...
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1answer
46 views

windows tcp/ip settings per network

In Windows 8.1 is there any native way to set network adapter settings per wireless network? I need to have one network (essid) where I manually specify the ip-adresses and all others DHCP. DHCP is ...
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1answer
214 views

TCP/IP to Serial - Serial Server

I have a server with 8 COM ports which I would like to make accessible via TCP ports, I've done quite a bit of research and tried numerous solutions including ser2net etc. All of which unfortunately ...
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3answers
737 views

Role of OSI layers when we open a url in browser?

I have searched on this topic a lot but I am not able to understand how and where OSI layers (Application, Presentation, Session, Transport, Network, Datalink, Physical) come into picture in the whole ...
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0answers
138 views

netsh set autotuninglevel: “the parameter is incorrect”

When trying to do netsh int tcp set global autotuninglevel=disabled from a command prompt, I get the error message "The parameter is incorrect". Several search results suggested "disabling 64-bit ...
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1answer
100 views

Redirect TCP/IP to COM port driver

There are many programs which emulate a COM port and let you redirect it to an ethernet port. I want to do the opposite of that. Create a virtual ethernet port that redirects to a physical COM port. ...
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5answers
346 views

Trying to understand IP packet flow

So I'm having trouble understanding how packets travel from one machine to another. Below I've put in an example of Computer 1 trying to connect to Computer 2. Computer 1 IP: 192.168.1.11 Subnet: ...
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0answers
67 views

How to switch between DNS suffixes using CMD (netshell)?

at my job, I have to manually switch between: 1) append primary and connection specific DNS suffixes and 2) Append parent suffixes of the primary DNS suffix a bunch of times per day (due to a ...
1
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1answer
151 views

Where can I change IPv4 Domain name on HP CP3505 Laserjet printer?

I can't seem to find the settings under the menu. I tried to find it under TCP/IP but to no avail. I forgot to add that under IPv4 it says ARP Duplicate IP Address...
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1answer
18 views

Connectivity between devices plugged into a router ethernet ports

If I plug 2 computers into free ethernet ports in my wifi router will I be able to establish connection between these pc or router does not allow it?
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3answers
13k views

how to enable 'Properties' button of TCP/IPv4 in Network connections in Windows 7

In the Control Panel\Network and Internet\Network Connections, I have a Wireless Network Connection. When I right-click on it, a properties dialog opens. Now, I need to change the IP address for ...
2
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1answer
4k views

How to send data to tcp server from command prompt [closed]

I am a java developer and quite aware of socket programming in java.I have a tcp server running my localmachine.I can write java codes for client and check communication between server and client.But ...
2
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1answer
46 views

Close all ports except for one on a Debian machine

I wish to set up a secure home file server on a Debian computer. I will be using my own server software that utilizes only a single TCP port. To make sure that the machine is fully secure, I'm ...
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1answer
36 views

Identify the TCP/IP classes respectively by beginning octets

I am busy studying for a network exam and I am stuck with this zinger: By studying the following beginning octets, identify the TCP/IP classes respectively 1-126 224-239 240-254 ...
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2answers
217 views

tcp retransmission on lan, wifi is fine

I have a Dell XPS 17 laptop (about 5 years old) running Windows 7 and a Synology RS412 NAS. I also have various other networked devices (servers, routers, laptops, pcs). Some are in my domain, some ...
1
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1answer
219 views

Getting corrupted data from the Internet - shouldn't TCP checksums prevent this?

The last 3 days, I've been getting corrupt data when surfing and downloading from a 3G internet connection. This is easiest tested by downloading a zip file from anywhere (e.g. ...
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1answer
179 views

How are ports and URI schemes handled by a tcp/ip server?

I am working with the lwip tcp/ip stack on an embedded device, and I'm trying to understand how it all works. I've been looking through the documentation and code, but I'm confused by how ports and ...
0
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1answer
14 views

View connection messages [closed]

I'm investigating some bugs on a Android Application, that uses a Third-party plugin. I need to view all connections messages between this plugin and a server. There is some way to list all send ...
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votes
1answer
179 views

How do you view a printer's IP address on a school protected network?

How do you determine the ip address of a network printer whose menu options on the printer has been disabled by school admins? Printing the configuration page does not show the TCP/IP information. ...
0
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1answer
146 views

In VMware what are the differences between the network connection options?

In VMware there are the network options I'm unsure what to choose. I've red the documentation here but find the situations it describes are too complex with my needs. I just want the internet to ...
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votes
2answers
71 views

Free official documentation for cables and models? [closed]

I've been looking through the ISO and IEEE sites for official documentation on the Open Systems Interconnection (OSI) model, TCP, and a range of cable standards (5/5e/6). However, other than on the ...
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2answers
512 views

Disabling “Use default gateway” on TCP/IPv4 kills the VPN connection

My work network requires you to disable the default gateway to use home directories etc. remotely. However, disabling the default gateway disables the VPN connection. Any solutions? Thanks.
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3answers
6k views

Source Address / Source Port vs Destination Address / Destination Port

I am new to TCP/IP and trying hard to learn basics. Well, I really wonder about inbound rules and outbound rules of Firewall and concept of source adress:port, destination adress:port. For example I ...
0
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1answer
308 views

VMware Workstation isolating guest to a separate internet

I have N1 and N2 network. The host has two ethernet adapters E1 and E2. The host is connected to N1 through E1, but I want to connect a guest to N2, and I do not want N2 to affect the host by any ...
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0answers
474 views

BOOTP packets blocked while DHCP packkets are accepted

We have an IP system that makes use of BOOTP for updating our embedded devices over IP. The main app uses DHCP for its IP configuration. Our devices are usually on the network of the customer, the ...
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0answers
89 views

Virtual machines using wrong IP addresses

I have a host computer (A), running three virtual machines: X,Y and Z. They're under a NAT layer, in which the Host A is the gateway (192.168.0.1/16), and the VM's are respectively 192.168.0.2 (X), ...
0
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1answer
100 views

How to say windows not to use specific network connection for Internet traffic? [duplicate]

I have slow VPN connection to another computer, which is also connected to internet as my computer is. When this connection is active, all browsing traffic goes via remote computer, although it is ...