Question 1

Can this set up.as a repeater (wifi extender)

Accepted Answer

This can be set up either as an access point (connected to your router by ethernet cable), OR as a WiFi repeater. But it cannot simultaneously do both. So, in order to implement a WiFi extender, you would need 2 of these -- #1 connected to the router by ethernet, and #2 connected to #1 by WiFi. The user manual refers to the #1 as the "WiFi base station" and #2 as the "WiFi repeater". I just confirmed this with Netgear technical support. If you have a router that can somehow act both as router and wireless bridge, maybe you could omit access point #1? But my Netgear RAX15 router can't do that.

Question 2

How do I get this to work as an access point with my Xfinity gateway/modem/router? It's connecting but no internet.

Accepted Answer

1.  You have to program the AC1200 using the admin account to act as an access point.  Connect your pc directly to the AC1200.  Turn the AC1200 on before you turn on your pc so that your pc gets a tcpip (internet) address that is compatible with the AC1200. 
2. Login to the AC1200 with the admin account.
Use your web brouser to get to the admin account.  The default web address is usually 192.168.0.1
3. You have to disable the dhcp function on the AC1200. The Xfinity router needs to be the only device to assign dhcp addresses.  If you don't disable the AC1200 from assigning dhcp addresses it will create a subnetwork that is separate from the Xfinity network using a different address range. (Usually starting with 192.168.000.002 to 192.168.000.255).
4.  Setup any security settings and network names before you enable the access point mode.
5. Save your new settings and write down any passwords that you may have changed.
6. I also usually put a static IP address in the access point that is in the range of the Xfinity router.  That way you can gain accesss to the AC1200 later because you know its address.
7.  Plug in an ethernet cable from the Xfinity router to one of the 4 lan outputs of the AC1200.  It might also work if you use the wan port (yellow connector) if Netgear updated their software.  If you use one of the 4 outputs it guarantees that the access point will be part of the existing Xfinity network.

Question 3

I don't see a wan port on this ac, it doesn't have one?

Accepted Answer

This product is a wireless access point, often called simply an AP, or Access Point, and as such it doesn't have a WAN (wide area network) uplink port.

You would connect this product to a regular LAN (local area network) port on an Ethernet (wired) router which in turn would be connected via its uplink port to a source of Internet access such as a cable modem that has been supplied to you as part of your cable company Internet access plan.

Question 4

does this device support bridge mode? (the AC1200)

Accepted Answer

This device does not support WiFi Client Bridge mode. It can only access as an Access point or Repeater/extender

Brand	NETGEAR
Product Dimensions	23.95 x 18.14 x 4.04 cm; 381.02 g
Item model number	WAC104-100NAS
Manufacturer	Netgear
Series	WAC104-100NAS
Color	black
Connectivity Type	Wi-Fi
Wireless Type	802.11n, 802.11b, 802.11ac, 802.11g
Number of Ethernet Ports	10
Voltage	12 Volts
Wattage	18 watts
Are Batteries Included	No
Item Weight	381 g

Wireless Desktop Access Point (WAC104) - WiFi 5 Dual-Band AC1200 Speed | 3 x 1G Ethernet Ports | Up to 64 Devices | WPA2 Security | Desktop | MU-MIMO | Supports 3 SSIDs | 802.11ac

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