Can ADSL only be one IP address?

In your environment, IP addresses can be divided into "private addresses" and "public addresses".

The private address is the intranet address, that is, for the entire LAN, the IP address of each computer!

The public address refers to the LAN as a whole, through the router to the internt world of a logo, people on the public network, will not see the private address, because there is only one ADSL dial-up in front of them by the ISP (telecom, Netcom and other network service providers) to provide the address!

Although there are many computers in the LAN (intranet), and there are many different private addresses, but on the vast Internet, they only communicate through one way, that is, an address obtained by the router after dialing ADSL, and all the data needs to be converted, filtered, and analyzed by the router to know which private IP machine is sending or receiving data by the intranet machine.

The IP you display through QQ is the public network address, and you can't see the private address!

Three computers facing the external network, will only present one IP address, of course, the port number (used to distinguish) is different.

For example, let's say you are studying at a university, you are majoring in computer science, and the email address is so-and-so from the computer science major of so-and-so university!

Here the university is the public network address, and in the face of so many schools across the country, the name of the school is the only difference.

When the letter arrives at your university, the mailroom will be responsible for delivering it to the mailbox of a certain major, which may be available in every school, and it is not the only one! But this work is really done by the people inside, and it is the router.

It's a mess, but you get the idea.

Yes, an ADSL account only has 1 IP address, and it is normal for you to see that his QQ is the same as yours, but the port used by his QQ is definitely different from yours.

It's best to set the IP address yourself, as for the problem of the ** thing card in the back, there is nothing to do. Whoever can set the traffic and set the traffic on the software (such as: Thunderbolt).

You see that it should be an extranet IP, which is different from that of an Internet café.

The IP addresses are not the same, and if they are the same, there will be a conflict, such as him, yours.

The question is too broad:

1. Many wireless devices (or devices) access the Internet through the same IP wireless router, which is okay, as long as the bandwidth allows.

2. Multiple wireless devices are set to the same IP (including the IP of the undoubtedly router), which is not feasible and will report an error that there is a conflict of IPs.

3. In the LAN, through the IP of the same wireless device (such as a wireless router connected to the cat dial-up Internet), the public public IP shows the same IP.

Of course not. The IP given by wireless transmission will be different.

1. Why is this?

Judging from your description, your parents' home is community broadband, in short, it is not the kind of broadband that requires dial-up in ordinary families.

Generally, routers set the Internet port (hereinafter referred to as the WAN port) as a dynamic IP by default, that is, an IP address is assigned by a server on the network, and the access to your parents' home is exactly this access method, so you can access the Internet without setting it on the first day.

The next day, you set the WAN port to dial-up, so when you connect the router to your parents' network cable, the router will try to dial, and your parents don't have broadband and can't dial up, so they can't access the Internet.

2. Is a wireless router that can only be used on one IP address?

No, it needs to be set up again.

3. Do I need to reset the settings when I change the computer and IP?

Not exactly, it depends on the status settings of the network, and in your question, it does need to be reset.

4. Or can I set up a wifi hotspot anywhere with a network cable as long as I hold a wireless router?

Yes, as long as the network cable can connect to the Internet normally and the router is set up correctly.

5. How to set it up?

Because the information provided by the landlord is too little to accurately judge the situation of the landlord, it is recommended that the landlord modify the WAN port to the default setting when he is at his parents' house, and the other settings remain unchanged.

1. If your "one network cable" refers to broadband, then you can network by yourself and come out with more than one IP address;

Then, if it is not enough, you can even extend the IP after each IP segment (add a new Layer 2 router, and the NMS is set to;

The above is just a simple example of "Class C IP address range" for easy understanding;

2. And if you are referring to a simple physical network cable, then it can only be connected to one terminal, and the IP address of that terminal can not be fixed, but it must be the only one, and there will be no network cable to connect 2 IP addresses.