Problems with private IP addresses, public IP addresses, and private IP addresses?

The external IP address is because the address obtained by PPPoE after each dial-up is different, so it will definitely change frequently.

Intranet IP is a mechanism for routers to automatically assign addresses by DHCP to help your computer assign them. To keep your computer for you is not typographed? It can't be a 3-digit number, it can only be an address or something) You can turn off the automatic allocation mechanism of the router, and then help set the static IP on your computer network card, note that setting the static IP also needs to know the router address, that is, the gateway address, and most importantly, know the DNS of your broadband provider, the DNS address can be obtained from the WAN connection status in your router.

Let's say your current address is, right-click on the local connection, select Properties, click on IP Settings (WinXP) or IPv4 Settings (Vista or Win7), and enter in:

The primary and secondary DNS are set up from the WAN connection in the router I mentioned above. If you are in Shanghai,I can tell you directly,Respectively,Of courseLZThe you can also use these two groups of IPs if you are not in Shanghai,It will slightly affect some network speeds (but if it is Northern Unicom or other operators, don't use it,It will greatly affect the network access failure),So it's best to take a look at the value in the router yourself,Or call your broadband operator's **** to ask for it。

Click on the right-click attribute of your network card and then,Replace IP103 with 101,Isn't it?

The level is limited, and corrections are welcome.

Subnet mask is a mechanism derived from the realization of modular management networks, which can realize the aggregation of networks. A contiguous IP address is represented by an IP address and a subnet mask.

Intranet IP and extranet IP are essentially the same, both are a set of 32-bit binary codes. The difference is that the extranet IP can be accessed directly through the Internet, while the intranet IP cannot be accessed.

The public IP address you apply for includes a 32-bit IP address and a 32-bit subnet mask (in fact, you don't need it, but you need to assign one for the convenience of management). The subnet mask is determined based on the number of IP addresses you request, and if there is only one host, the subnet mask is , that is, there is only one host in the subnet.

Second, do you mean why the public IP addresses are continuous during mapping? The use of consecutive IP addresses is only for the convenience of management and distribution. A contiguous IP address block is always easier to control than a scattered IP address block.

This can be due to a variety of reasons, and it is recommended that you check them in the following order:

1.Check if the network cable is connected properly - the direct cause may be that the network cable is loose or broken, and the network cannot be connected.

2.Check if the router is functioning properly - it is a private IP range that requires the router to provide intranet services.

3.Check firewall settings - The company may have turned off external access to the network segment at the firewall.

4.Check the settings - If your company uses it, you need to set up the system correctly.

5.Check your DNS settings - Confirm that your private DNS settings are correct.

6.Check for other computers within your LAN - if only your computer can't reach it, it's a local issue.

7.Contact the Network Administrator - If all the intranet computers are inaccessible, it is likely that the network administrator has blocked the IP. You need to contact them to solve it.

You can try the following:

1) Open the command prompt, enter ping, if the replies are all packet loss, it means that the network connectivity problem is wrong.

2) Test access with other intranet computers in the model, and if it passes, it will prove that it is your native problem.

3) Restart the router to see if it solves the problem temporarily.

4) Join the company VPN and try it to see if you can access it.

5) Finally, contact the network administrator and ask for their help with complete information (network environment, methods tried, etc.).

Network errors can be caused by a number of reasons. Here are some suggestions to fix this issue:

Check your network connection: Make sure your device is properly connected to the network and that your router and switch are working. Use the command prompt (press win + r, type "cmd") and try ping to see if you can communicate successfully.

Turn off your firewall: Sometimes your firewall might prevent you from accessing network resources. Try turning off Windows Firewall or other security software and try access again.

Make sure file sharing is enabled: On the target computer, make sure that file and print sharing is enabled. Open Control Panel > Network & Internet > Network & Sharing Center, and then tap Change Advanced Sharing Settings.

Make sure File and Print Sharing is enabled.

Check sharing permissions: Make sure you have enough permissions to access the shared resources on the target computer. On the target computer, right-click on the folder you want to share, select "Properties", and go to the "Sharing" tab.

Make sure your user account has the appropriate permissions in the Sharing and Security tabs.

Make sure the target machines are in the same workgroup: Check if the two machines are in the same workgroup. View and change workgroup settings in Computer Properties.

Restart your computer: Sometimes, restarting your computer may resolve network connectivity issues.

If none of the above suggestions resolve the issue, you may need to check your network settings and hardware further.

What's the problem, the private address of the LAN cannot appear on the public network. You can't just use a router, you want to connect a few on a few units.

Although there are countless services and computers connected to the Internet, they are not in a chaotic and disorderly state, but each host has a unique address, which serves as the only sign that the host is on the Internet. We call this an IP address (Internet

protocol

address）。It is a string of 4 dot-divided numbers, each of which is between 0 256, e.g. 0 255 0 255 0 255 0 255 0 255;For example, 202 202 96 33 is the IP address of a host server.

Another way of representation gets rid of the monotony and hard to remember shortcomings of numbers, and uses the domain name dn (domain

name), that is, a literal name representing the host, such as www lg com cn is the domain name of a company's hosting server. dns（domain

Namesystem) The domain name server system translates the image text domain name into the corresponding numeric IP address. Through the above-mentioned IP, domain name DN, and domain name system DNS, each host is given a unique positioning on the Internet.

Intranet and public are two ways to access the Internet.

Computers on the intranet access the Internet through a public gateway using the NAT (Network Address Translation) protocol.

A computer on the intranet can send a connection request to other computers on the Internet, but other computers on the Internet cannot send a connection request to a computer on the intranet.

Public network access mode: The IP address obtained by the computer accessing the Internet is a non-reserved address on InetNet. Computers on the public network and other computers on the Internet can access each other at will.