Can I separate networks, eg. Guest and private?

You can have those separated by creating different Vlans.

Does the router support layer 3 services like NAT?

Yes, it is a fully fledged L3 routing device. I have one running as the gateway on our gigabit fiber connection replacing the ISP provided gateway, I also have edgerouter devices (all edgerouter devices share the same OS but slightly different throughput and switching capacity, it's based on debian/vyatta) deployed for business purposes as VPN concentrators and branch devices.

What is the difference between sfp and rj45? why would sfp be useful ?

SFP=Small form-factor pluggable transceiver. It is a standard that allows different modules to be plugged into the port, allowing things like fiber connections or another RJ45 ethernet port.

The listing says: Voltage 240 Volts I assume this is automatic switchable between 120 and 240?

Yes, it's auto switching power supply.

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Ubiquiti Networks Edgerouter 4 Ethernet Lan Black Wired Router

Product ID: 149579591

Details

Brand
Ubiquiti
Color
black
Compatible Devices
Personal
Connectivity Technology
Ethernet
Frequency Band Class
Single-Band
Item Weight
795 Grams

⚡3.4M packets/sec blazing speed

🔗4 Gigabit Ethernet ports

🖧1 SFP port for fiber uplink

Description

🚀 Power your network like a pro — speed, control, and style in one sleek router!

RACK MOUNT READY - Easily integrates into professional setups with optional rack-mount compatibility.
COMPACT YET POWERFUL - Delivers up to 4 Gbps line rate in a sleek, cost-effective design that fits any workspace.
BLAZING FAST THROUGHPUT - Handles up to 3.4 million packets per second for seamless multi-client performance.
CENTRALIZED CONTROL WITH UNMS - Manage your entire network effortlessly with Ubiquiti’s intuitive Network Management System.
ENTERPRISE GRADE CONNECTIVITY - Four gigabit Ethernet ports plus a dedicated SFP port for flexible, high-speed networking.

The Ubiquiti EdgeRouter 4 (ER-4) is a high-performance wired router featuring 4 gigabit Ethernet ports and 1 SFP port, capable of processing up to 3.4 million packets per second with a line rate of 4 Gbps. Designed for enterprise environments, it offers robust routing powered by EdgeMAX technology and is managed via the user-friendly UNMS platform. Compact, rack-mountable, and secure with WPA2 protocols, it’s the go-to choice for professionals demanding speed and reliability.

Specifications

ASIN	B078XR27HX
Antenna Location	Home
Best Sellers Rank	#25,025 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #747 in Computer Routers
Brand	Ubiquiti Networks
Color	black
Compatible Devices	Personal Computer
Connectivity Protocol	Ethernet
Connectivity Technology	Ethernet
Control Method	Voice
Customer Reviews	4.7 out of 5 stars 209 Reviews
Data Transfer Rate	1 gigabits_per_second
Frequency	1000 MHz
Frequency Band Class	Single-Band
Global Trade Identification Number	00817882020657
Item Weight	795 g
LAN Port Bandwidth	4 ghz
Manufacturer	Ubiquiti Networks
Maximum Upstream Data Transfer Rate	4000 megabits_per_second
Mfr Part Number	ER-4
Model Name	Ubiquiti EdgeRouter 4
Model Number	ER-4
Number of Items	1
Number of Ports	4
Operating System	Ubiquiti Networks Software (UNMS)
Other Special Features of the Product	WPS
RAM Memory Installed	1 GB
Security Protocol	wpa2-psk, wpa2-enterprise
Special Feature	WPS
UPC	817882020657 703624201258 817882021791
Unit Count	1 count
Voltage	240 volts
Wireless Communication Standard	802.11n
Wireless Compability	802.11n

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