Why can t different routes under the same network line enter the same LAN?

Eighty percent of the addresses are not from the same network segment, so of course they belong to different LANs. There is also a possibility that the address is the same network segment, but the WLAN is divided.

LAN is definitely a layer-2 concept. The concept of Layer 2 means that the LAN is all about querying MAC addresses, not IP addresses. If it's by IP address**, we call it a WAN.

In a broad sense, LAN refers to the internal network of a company or a unit, which has many switches and other devices in this network, forming a large layer 2 network. In the narrow sense, a LAN refers to a network that has the same broadcast domain.

The concept of the broadcast domain is closely related to the mechanism of the LAN through the MAC address**. LAN is through MAC address**, but what happens when the PC finds out that it doesn't know the MAC address of the other party? The LAN prescribes a mechanism called "broadcasting".

As shown in the figure below, the broadcast address is a MAC address with all F. When the destination address of a data packet is the broadcast MAC address, all terminals on the LAN will receive the packet, which is called the broadcast domain. When our PC is in the LAN** packet, the ARP packet used to obtain the MAC address of the other host is the broadcast packet.

As mentioned earlier, we called the network range where the host that can receive the same broadcast packets in the LAN is located. However, there is a problem in the broadcasting domain, that is, a port (optical fiber, network cable) of the LAN in the past must be in a broadcasting domain, but under an optical fiber, different departments will be connected, and different departments want to be in different broadcasting domains.

For example, department A only hopes that department A can visit each other. Secondly, I don't want to be affected by other departments. For example, if all departments are in one broadcast domain, then the network can easily be paralyzed.

For example, if the three departments A, B, and C are all in the same broadcast domain, then if the C department has a computer poisoning, it will continue to send broadcast packets, resulting in all hosts of the three departments A, B, and C receiving broadcast packets, and the entire network will be flooded with broadcast packets, which will lead to the LAN paralysis in serious cases.

The same network cable cannot enter because it is not in the same network segment, so the router will not be able to enter the same LAN.

It may be because they are under the same network line, but not in the same network segment, so they can't enter the same area.

It may be that because different routes have different addresses, they belong to different network segments and cannot enter the same LAN.

The network segment where the router is located is different, so naturally you can't get in.

Different addresses of different routes are not in the same network segment, and routes in the same network segment are isolated by VLAN.

Because the IP addresses of different routers are different, of course, you can't enter the same LAN.

Because the service area of different routers is different, it can't be entered.

Because routers have different specifications and different coverage, they can't get in.

Because the IP address of this router is different, the LAN that can be browsed is also different.

This is a technical security guarantee, otherwise it would be very dangerous for someone to deliberately do this.

Summary. Hello! Glad you chose to use the Ask Us Consulting program! Thank you for your trust in us! Here I join hands with the vast number of askers, staff and answerers. Thank you from the bottom of my heart!!

For this question you asked, our system has assigned you the most professional answer, the next 5 minutes, he will answer your questions relatedly, because the current number of consultations is large, please be patient. You can review your question, complete the information, or add a description of your question.

Why can one route be used for the same network cable?

Hello! Glad you chose to use the Ask Us Consulting program! Thank you for your trust in us!

Here I join hands with the vast number of askers, staff and answerers. Thank you from the bottom of my heart!! For this question you asked, our system has assigned you the most professional answer, the next 5 minutes, he will answer your questions relatedly, because the current number of consultations is large, please be patient.

You can review your question, complete the information, or add a description of your question.

Hello dear. First, the operator restricts a broadband can only be connected to one device, in this case, you can set up a router, activate the cloning MAC address function, so that all devices that access the Internet through this router have the same MAC address, second, the router has access to too many devices, reaching the upper limit of bearing, the default IP address of ordinary wireless routers is Class C**, theoretically can only access 254 devices, if this upper limit is exceeded, there is no IP address that can be assigned, If the newly connected device is not assigned an IP address, it will naturally not be able to access the Internet.

3. If the router uses a static IP address, it is also possible that the IP address of the two computers is set to the same, or the IP address is set incorrectly, such as the IP address of the router is, but the IP address is set when the computer is set. Fourth, the cause of the virus, if there is a computer in the LAN infected with the ARP virus, it will lead to the computer in the local area of the gateway chaos, naturally can not access the Internet, in this case, you can use the windows command line command to bind the gateway IP address and the gateway MAC address, for example: 5, the LAN can limit the IP address that can access the Internet, not all computers can access the Internet.

I'm asking about routers.

I know dear, I sent it to you to try.

I want to try it with a computer or a mobile phone.

Check the network cable interface first, and then check the router.

There is no problem with the network cable interface.

That's when the router is broken.

That's the router problem.

So I just want to ask what is the problem with the router and how to solve this problem?

Get a new router.

In general, VLANs (virtual local area networks) can be set up in high-end routers, and devices under the same router can not communicate with each other in different LANs. Ensure security, limit switch broadcasting, make better use of broadband, and reduce network latency.

As shown in the figure below, different colors belong to the same LAN, and although the same switch is connected, they do not belong to the same LAN and cannot communicate with each other.

It's not that it's no longer in the same LAN.,It's a problem with the network card setting of your flying pigeon book.,It's estimated that the notebook is set up with a limited network card of the notebook.,You see,It's generally this problem.。

It is recommended to use feiq to transmit things on the local area network.,That thing is easy to use and good-looking and easy to set up,

Hello, you first go to the computer of the wireless network card to check the IP address of this computer, and check the way to view it: start-run-cmd, wait for the black box to pop up, and then enter ipconfig all

After knowing the IP address.

Ping this IP address on your computer to see if you can ping it, and if you can ping it, it must be in a local area network.

Hope it helps.

With a route, it must be within a local area network.

Solution: Use one computer, create a homegroup, and another computer joins the homegroup, and you're good to go.

What kind of USB flash drive wireless network card is the landlord??? Is it connected to wifi or dial-up?

It may be that the network cable port is loose, or the port connection is wrong.

The network connection is normal, and I can't go to the network on ninety.

Is there a conflict in IP?

I'm showing that the remote computer or device will not accept the link.

What about people? Oh, and it's the IP address setting issue.

You need to change the IP address in the network connection attribute to manual.

What did the ip change to.

Change Protocol 4 in Properties to set the IP address manually.

You can set the number on the photo**.

It's set up or can't go up.,Wen ten system.。

<> topology diagram. 1. Tianyi gateway.

, configure DHCP on the gateway address.

2. Take a network cable, one end is connected to any LAN port of the Tianyi gateway, and the other end is connected to the WAN port of the router.

3. The WAN port configuration address of the router is as follows:

4. The DHCP gateway address of the router is configured as follows:

This way, your PC 1 can access the router and also PC 2

Because each router may need different data, there is no such thing as the same local area network.

Although it is the same network cable, different routers have different network limitations.

This is because if the router is different, the LAN you enter must be different.

Because they are different paths, they can't enter the same LAN, and I think this is a very simple problem.

Because the LAN has its own setting mode, this will not cause interference to the network.

This is due to the interoperability between networks, which can communicate with each other.

Because they are different routes, aren't they?

Because of the different routers, their LANs are also different.

Of course, there are many reasons, do you think so?

Analyze your situation, you should have two computers connected on the same route.

The cable should have been connected by you yourself (i.e. in a service such as telecom or Netcom), and if this is the case, then you should not have set up a route. One computer can dial numbers, while the other computer can't, and there is a conflict when you dial up. This computer cannot connect to the Internet because the router does not have an IP assigned to it, so this computer cannot receive signals.

Naturally, there will be no network.

To enter the account number and password of the route into the route, you can set it to autocast!

How to set up: 1. Connect the settings (if you don't know this, I can't help it!) ）

2. Open the webpage and enter a dialog box where you will be asked to fill in your account and password. The account number and password are on the back of the route, fill it in and you can log in!

3Click on the "Broadband Settings", and there is a place to fill in the account number and password on this interface.

4. Fill in the account number and password of your network cable. Save and set the auto-dial to reset the route. (You only need a computer to set up the route!) ）

5. Set the IP in your computer, click "Internet Neighbor", "Local Connection", Properties, and IP Protocol. Both computers need to be set, just fill in the numbers in between in the IP! (Do not set the same IP for two computers).

This way, both computers will be able to access the Internet. The above method is the setup method of telecommunications. Other network cable services have other IP addresses, you can see it, just change the number!

If you don't have your own network cable, (such as the school one), then it should be your network cable problem! or the interface of the route. The solution is basically to change the equipment, because you don't have the tools.

Is it plugged in the wrong line?,I just ran into this problem and check the plug-in from the new.,Or it's the computer's network card that has a problem There is also an IP address setting.,For example, if there is a network, the address is set to you or 4.,And then turn on the routing mode in the router.,You can have a network.。

Enter the router and configure the HDCP address pool and DNS

Situation 1: After one is connected to the Internet, unplug it and plug it directly into another computer?

In this case, you need to restart the adsl cat because the MAC value of your network card has changed.

Situation 2: Do you use an adsl cat and a one-way network cable interface to connect two computers?

If it is, connect two wires from ADSL (you need to spend 3 yuan to buy an interface), which one is used, which is networked, and the conditions of use (very necessary):

First of all, both must be plugged into the power cable (for grounding), and both must be plugged into the network cable;

Then, when one is on, the other must not be opened: otherwise the adsl cat will not be able to find the target computer, and both machines will not be able to be turned on.

This method does not need to reverse the network cable when only one machine is used, but this method: "one must not open the other" can only be played.

The role of a machine seems to be really unnecessary. But if you put one in the living room and the other in the bedroom, where do you want to be?

Where is it, there is no need to change the network cable, and there is also convenience. And it's the most energy-efficient way to save money.