-1
votes
1answer
22 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
0
votes
0answers
49 views

Ethernet port on Linux machine not recognizing ethernet connection with embedded device

I have an atmel at91sam7x256 microcontroller that I would like to use for a TCP/IP communication. The very first step of my project is to be able to "ping" my board given its IP address. I have its IP ...
-1
votes
2answers
108 views

Is DNS query a UDP or TCP?

I know that when we first type an address on the URL and enter. The DNS query starts. I don't who initiates, but my guess is application will only initiate the DNS query. The DNS query already knows ...
1
vote
1answer
1k views

Communication possible between 192.168.0.x and 192.168.1.x?

I have a problem I encounter on a regular basis. I have an access point with a fixed 192.168.0.x IP address. My network is 192.168.1.x. The problem is when I plug the access point into my network, it ...
1
vote
3answers
799 views

Network Traffic per process/application windows

I know that there are plenty of applications to do this (like procexplorer) but is there anyway to access the winapi (what method/reference is used) to retrieve the network traffic (TCP, UDP, etc) per ...
1
vote
2answers
326 views

TCP SYN does not reach TCP server

I have a TCP server listening on 10.10.10.101, port 2000, running on a Windows 7 machine. Below is the corresponding output line for the command netstat -aon: TCP 10.10.10.101:2000 0.0.0.0:0 ...
1
vote
1answer
349 views

What does this tcpdump printout mean?

I'm not very experience with networking, so on my free time, I usually try and learn some more things about the internet and how it works. While at school, I came across tcpdump and wanted to give it ...
2
votes
3answers
411 views

Are SSH protocol headers sent in the clear over a client-server connection?

I know routing information is always sent in the clear (oversimplification, but bear with me) so in a scenario where there exists an SSH tunnel between a client and a server using non-standard ports, ...
1
vote
1answer
278 views

Rule of thumb for TCP upstream bandwith requirement

In TCP, the recevier every now and then acknowledges the receipt of sent packages. Therefore to achieve a specific downstream bandwidth there is always a minimum upstream bandwidth required. What I'm ...
88
votes
13answers
8k views

Must TCP use IP?

I have always heard that TCP is short for TCP/IP and they mean the same thing. However, is it not possible for TCP to be built on top of another protocol besides IP?
2
votes
1answer
64 views

Can't connect to the web

I have 2 laptops. One is Windows 7 PC, another is Apple. I also have a DSL modem and a router. The problem is I can't connect from the Windows 7 but can from Apple. I can ping the router without any ...
1
vote
3answers
301 views

Easy-to-use program for directly transfering big files to an IP-address

I saw this xkcd comic and was horrified that he is actually right: xkcd comic So, is there an EASY program to share files directly over IP? In the spirit of: open it it displays your current IP ...
7
votes
2answers
8k views

How does circumventing IP restrictions through DNS work in the case of hulu.com?

I just heard from an australian guy that it is possible to watch hulu.com from Australia (which is actually restricted by country IP checks) by using certain DNS servers. Now I was wondering, how ...
0
votes
2answers
148 views

Transmission Contol Protocol (TCP) confusion

I am confused as to how the TCP actually works. I have read in several books and articles that it is responsible for the rearranging of transmitted datagrams at the receiving host. However, I have ...
6
votes
5answers
7k views

How do IP answer packets reach their destination inside of a private LAN?

This is a little theory question that has been confusing me for a pretty long time. Basically, if we are inside of a private LAN, and we want incoming packets to reach, for example, an HTTP server ...
0
votes
2answers
4k views

Minimum size of the data part of TCP segment

My question has two parts: I know that the "data" part of an Ethernet frame can be 46~1500 bytes. Considering the IP header of 20 bytes + TCP header of 20 bytes, the minimum "data" size of a TCP ...
4
votes
1answer
825 views

What is the purpose of ports?

I have a few questions in regard to the following explanation of ports I found. The Application layer talks to the Transport layer through a port. Ports are numbered and standard ...
1
vote
2answers
1k views

Hardware/Software behind IP/TCP layers encapsulation

Every tutorial I read talks about how the layers "communicate" with each other, but never mentions what hardware/software receives, adds on, and sends each layer of control data. What piece of ...
2
votes
1answer
697 views

Does mobile phones use TCP/IP? [closed]

Does mobile phones (any kind of mobile phone?) use TCP/IP over radio signals for internet? I would also like to know if they use VoIP for telephony? Please tell me what they use, I'm confused.
3
votes
1answer
49 views

DNSSEC regarding

I'm asking this question as software (and also because there have been a few DNSSEC questions on here in the past). http://en.Wikipedia.org/wiki/DNS_cache_poisoning#Prevention_and_mitigation I ...
1
vote
1answer
787 views

Difference between TCP and IP tunnelling?

Can someone please explain in terms of the OSI (or TCP/IP) layers, what is the difference with what goes on when you tunnel IP or TCP, say over the ICMP protocol (although the latter doesnt really ...
1
vote
1answer
571 views

Can IPSec (or any other VPN tunnel) hide your IP address while browsing?

Is there a VPN/tunnelling method which you can use to browse the web, but will also prevent somebody from seeing your IP address if they were sniffing the network? I wasn't sure if the IP address ...
0
votes
1answer
526 views

ICMP Tunnelling IP vs Tunnelling TCP?

Could someone please explain the difference between tunnelling IP data using ICMP packets and tunnelling TCP data via ICMP? Obviously I know this is going to be something relevant to the different ...
2
votes
1answer
932 views

Understanding ipconfig output in Windows

I use Windows 7 and am connected to a LAN. In cmd I typed ipconfig. There were many headings reading "Tunnel adapter local area connections" (with 13/19/17 appended to it). What does this mean? ...
1
vote
1answer
1k views

Can't access HTTP server, but ping works in LAN

I encounter a problem when configure the connection. My computer resides in a LAN, I want to assign it a static IP address. Thus with the help of port mapping on the router, I will be able to access ...
4
votes
3answers
7k views

How exactly does a proxy work?

If I want to connect to say, IP 100.100.100.100, Port 80, my computer will send a tcp packet with this adress into the wire. Now If I use a proxy server say, 200.200.200.200 Port 8080 (such kind of ...
0
votes
2answers
2k views

Size of an IP Packet

What is the complete size of an IP Packet?
16
votes
5answers
6k views

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...