新聞財經娛樂♬資訊 News Economy

Recently, I am taking tutorial of network class and there are a lot of network concept
i am getting confused, so I try to start to understand my home PC and network to solve my network concept problem.

At home, I get two PC with one at window 7 and the other at Window XP which is connected to one device we call ADSL something like the photo I include at web link
https://en.wikipedia.org/wiki/File:Adsl_connections.jpg

When I go to broadband internet, I log into window 7 or  PPPoE connection utility or
software with my login and password that is provided by my ISP company

After connection, I try ipconfig on cmd.exe,and I got the following message

PPP adaptor:
Ipv4 IP 219.77.x.x
subnet mask: 255.255.2555.2555
default gateway:0.0.0.0

I am using auto configuration mode for the connection setup for external IP and  internet .

The question:
1- the  device of ADSL means  that is router plus modem, Right ?
2- router means network switches like the 4 ports in the photo attached, Right ?
3- DefaultGateway  or Gateway for my case that is refered to the my ADSL router, RIght
4- Why the default gateway is 0.0.0.0 ?
5- I google default gateway 0.0.0.0, and found one article how to delete 0.0.0.0 default gateway (http://www.shayanderson.com/microsoft-windows/windows-7-fix-0-0-0-0-default-gateway-issue.htm) but it doesn't work, but 0.0.0.0 is still there,why?
6- I also tried to use the command
netsp int ip reset c: esetlog.txt  & netsp winsock reset c:winsock.log and reset the computer and logging again, but 0.0.0.0 is still there and not deleted, why ?

Hope you write more like for teaching student in a class for those questions

Please advise
Duncan

You have nothing to worry about if you are able to get on the internet.

Going back to your question
0.0.0.0 in network statements for routing just means send everything that has no specified instructions to the gateway.
I'm using non-technical terms for simplicity.

Open command prompt and type

"route print"
then press "enter"

You will see router statements. The 1st address at the top shows 0.0.0.0 0.0.0.0 the IP address that follows is the gateway for that computer. It could be a public address or private depending on if you are using public or private addresses internally

Your modem handles DHCP (giving private ip numbers to your internal network), so dont worry about that setting being NO, it just means the device you use to make the PPPoE connection is not configured as a DHCP server, no problem.

open command prompt and type
ipconfig /all


Private addresses eg 192.168.1.1 are not allowed on the internet. They are not routable and are dropped by ISPs. Don't pay too much attention to this to avoid confusion. Private addresses need NAT to translate them to public IP Addresses.

Consider a building for example with a lot of rooms.
eg Room A, Room B, Room C etc.

Many buildings may have the same Room number normenclature in them. You can not send a letter to Room A. Post office does not know where to send it.

Room A, B and C are private addresses

Your public address would be the address of the house, eg 555 Heaven Street, Paradise City, Universe

Hello again,

No, please see the gateway as a mean to connect to the internet.
Since you are directly connected you do not have a gateway YOU ARE the gateway.
If your modem is logged on to your ISP it gets an public ip and probably 2 DNS servers assigned, thats it.

When you connect to the internet (through your modem) then you are using the modem as a gateway. (remember, it is a mean to go to the internet)

Same with larger networks, they probably have multipl connections to the internet so possibly mulitple gateways.

Your ISP is your gateway to the internet

Your router is your gateway to your ISP.


It's like going through your front door and through your main gate to the street.

Nothing to worry about then. Just ignore the 0s

That means the public address is your gateway.

On your computer, do a show ipconfig /all

That will give you your private ip address and your router will be your gateway.

No

You need to set DHCP to YES.

That is the reason you're getting the 0.0.0.0.

It's not sending a request (ARP) out to your ISP.

DSL is just the term for the type of service you have.

Replace DSL with "Fast Speed Internet".
It will sound odd to look at your router and say that is my fast speed internet.

Similar to looking at your cooler and saying, that is my fountain water. You can put any type of water or juice in your cooler. The content does not change what your cooler is.

Hi mister Hong Kong :)

You show us: Ipv4 IP 219.77.xxx.xxx  ( i obfuscate so we do not see your public ip)
default gateway:0.0.0.0

This means the connection to your provider, it does not need a gateway because IT IS the gateway.

1- the  device of ADSL means  that is router plus modem, Right ?
Yes thats right
2- router means network switches like the 4 ports in the photo attached, Right ?
It surely looks like a router but could also be an Access Point.
3- DefaultGateway  or Gateway for my case that is refered to the my ADSL router, RIght
Default Gateway is the (internal)ipnumber of the device that connects to your provider
4- Why the default gateway is 0.0.0.0 ?
Because there is non.

Hope this helps

Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data ...


Router is not a Switch. A switch switches packets
A Router routes packets


Default gateway is like the main door of a house.
To go out of the house, you need to go through the main door, otherwise, you'll just be going from one room to another

Your public gateway is the IP Address of your ISP that your network is assigned to. Usually this is populated by their DHCP server. If you're getting 0.0.0.0, you may need to contact your ISP for resolution. Maybe reset your modem.

The netsh command only resets the NIC interface on the computer you ran it on. The issue you're having seem to be on your modem. Most modems have a reset button that you can poke a pin to and hold for about 10 seconds.