Does the reset on the back of the router, reset to all default factory settings?

Use reset button.

I do not know what is your router type. Therefore I put here more options. Select what is valid for you:

• Linksys

Linksys Official Support Resetting your router and changing the router...

• TP-Link

How to reset TP LINK products to factory defaults

• Netgear

Restoring NETGEAR home router to the factory default settings Answer...

• Zyxel

wish to restore the factory settings for my Zyxel router
or
ZyXEL PK5001Z Factory Reset

• Asus

How to Reset the Asus RT N66R
or
How to Reset the Asus WL 500g

• D-Link

http://blog.dlink.com/what-is-a-reset-button-when-should-i-use-it
or
http://www.dlink.com/uk/en/support/faq/modems/dsl-modems/dsl-series/how-do-i-reset-my-adsl-router-back-to-factory-default-settings

• Belkin

Resetting the Belkin router to factory default settings using the Reset...

how was the name reset and by who??????
if you mean you have to reset your router to the factory default settings
(note all settings will be lost you will need to reconfigure the router)
you will need to reset the device to factory defaults. However, once the device is reset to factory defaults, depending on your router) to reconfigure your router settings or if there is a small hole in the front or back of the router push a hair pin in to reset to factory settings

what is the model #?
Most netgear routers default to a username of "admin" and password is either " admin ", "password" or it is just blank. Those are the defaults unless someone changed it.
If you cant get in you can hold down the reset button on the back for 30 seconds (while it is plugged into power) and that will set it back to factory default settings then one of the above should work.
If this was a help please give me 4 thumbs up as I am trying to build up my rep on this site!

Unfortunately, there is no way to recover a lost or forgotten password from a router or access point; you will need to reset the device to factory defaults. However, once the device is reset to factory defaults, you can use the default username ("admin") and password (either "password" or "1234" depending on your router) to reconfigure your router settings.

or

if there is a small hole in the front or back of the router push a hair pin in to reset to factory settings

hope this helps

If you reset the router you will lose all the settings of the router.
On the router you will find a small reset button .
Hold it down for 30 seconds.
Unplug the power cable and plug it back in.
wait for 30 seconds and then reconfigure the router.
Click Here for more info about router set up.

A couple times a year I have to reset my WRT54G back to the factory defaults. There are a couple of methods to do this.

Reset Button Note:
Resetting the router to the factory defaults will delete any changes you have made to the router, including any security settings. This should be used as a last resort.

The first method involves simply pressing a button located on the back of the router. The image below (courtesy of Linksys) shows where the button is located.
To reset your router, use the following steps:

1. Press the reset button for 30 seconds. The settings should now be returned to the factory default settings, meaning any changes you had made would be deleted.
   
2. Open up your Web browser and enter “192.168.1.1? in the address bar.
3. For the login, leave a blank ID and enter “admin” as the password.

The router has now been reset. You'll need to go back in and set up any passwords or wireless security you had set up before.
Through the Web Administration Pages The second method involves logging into the Web administration pages of the router. Use the following steps to reset the router using this method:

1. Open your Web browser and enter the IP address of your router. By default, the address is “192.168.1.1?.
2. Enter your user ID And password when prompted. Hopefully this has been changed, but if it hasn’t, the default is no ID and “admin” as the password.
3. At the top of the Web page, click “Administration” and then “Factory Defaults”.
4. Beside “Restore Factory Defaults”, click “Yes”.
5. Now click the “Save Settings” button at the bottom of the Web page.

The router should now be reset to the factory defaults. Again, you'll need to go back in and set up any passwords or wireless security you had set up before.

Did you try holding the reset button in for 30 seconds or more?

A couple times a year I have to reset my WRT54G back to the factory defaults. I have PC's and laptops connected via CAT5 and wireless. There are a couple of methods to resetting to factory default.

Reset Button Note:
Resetting the router to the factory defaults will delete any changes you have made to the router, including any security settings. This should be used as a last resort.

The first method involves simply pressing a button located on the back of the router.
To reset your router, use the following steps:

1. Press the reset button for 30 seconds. The settings should now be returned to the factory default settings, meaning any changes you had made would be deleted.
   
2. Open up your Web browser and enter “192.168.1.1′ in the address bar.
3. For the login, leave a blank ID and enter “admin” as the password.

The router has now been reset. You'll need to go back in and set up any passwords or wireless security you had set up before.
Through the Web Administration Pages The second method involves logging into the Web administration pages of the router. Use the following steps to reset the router using this method:

1. Open your Web browser and enter the IP address of your router. By default, the address is “192.168.1.1′.
2. Enter your user ID And password when prompted. Hopefully this has been changed, but if it hasn’t, the default is no ID and “admin” as the password.
3. At the top of the Web page, click “Administration” and then “Factory Defaults”.
4. Beside “Restore Factory Defaults”, click “Yes”.
5. Now click the “Save Settings” button at the bottom of the Web page.

The router should now be reset to the factory defaults. Again, you'll need to go back in and set up any passwords or wireless security you had set up before.

Okay,i only option is to reset the router to its factory settings.
Please follow the steps to reset the router.
The router can be set to factory default by pressing the Reset button of the router and resetting through the router’s web-based setup page. Pressing the Reset button on the back of the router for 30 seconds will reset your router to its factory default settings. Any settings on the router will be erased and the router’s IP address will become “192.168.1.1,” the username is still blank, and the password will be “admin.”
To perform a hardware reset on your Linksys router follow the steps below.
Step 1:
Take note of the current settings of the device before resetting.
Step 2:
Press the Reset button of the router for 30 seconds.
Step 3:
If the normal reset does not work, unplug then plug back the router's power adapter while pressing the Reset button.
To reset the router via its web-based setup page, follow the steps below.
Resetting the Router Using the Web-Based Setup Page
Step 1:
Access the router’s web-based setup page. .
NOTE: If you are using Mac to access the router’s web-based setup page,
Step 2:
When the router’s web-based setup page appears, click Administration then Factory Defaults.
Step 3:
Look for Restore Factory Defaults and select Yes.
Step 4:
Click

The following reset procedure will completely restore the default settings on the VDI-604 and VDI-624. Note: If you do not remember your password, you will have to reset the router to factory defaults. Step 1 Locate the reset pinhole on the back of the unit. Step 2 With the unit powered on, press and hold the Reset button. Step 3 Hold the Reset button for about 10 seconds. Step 4 Release the Reset button. Step 5 The unit will reboot. Allow 20-30 seconds before reconnecting. Step 6 The device is now at factory defaults. Note: Do not recycle power during the reset procedure. VDI-604 firmware 1.05F/VDI-624 firmware 2.39DDM - The default username is admin and the default password is blank (nothing). VDI-604 firmware 1.07 Build 28/VDI-624 firmware 2.43 Build 12 - The default username is admin and the default password is password. Note: After resetting the router to factory defaults, you will need to contact Verizon to reconfigure your WAN settings.