VPN安全等级与TP-Link WPA3对比及双网需求下的网络方案选型咨询

Hey there, let's unpack your questions clearly to help you make a decision that fits your needs:

First: VPN vs. WPA3 – They’re Not Direct Competitors #

First off, it’s important to clarify: WPA3 is a wireless link encryption standard — it protects data transmitted between your devices and the router over WiFi from being intercepted or cracked. A VPN encrypts your entire internet traffic end-to-end, regardless of whether you’re using WiFi or wired connections — it shields your data from prying eyes on the broader internet, your ISP, or any external networks you connect to.

They serve different security layers, so you can’t really say one is "on par" with the other. WPA3 secures your local wireless access, while VPN secures your traffic beyond your home network. They can work together for stronger overall security, or independently depending on your focus.

Breaking Down Your Two Options #

Option 1: Add a WAN Switch (like ER-605) to Your Old Router, Sell the AX1800 #

• Pros:
  • Lower cost: Selling the AX1800 offsets the switch’s price, and you keep your existing VoIP setup intact (critical since your contract ties you to the old router).
  • Your existing VPN will still secure your internet traffic, so your data’s safety on the web is maintained.
• Cons:
  • Old WiFi protocols (like WPA2 or older) are less secure than WPA3. While VPN encrypts your traffic, a weaker WiFi standard makes it easier for attackers to gain access to your local network (e.g., brute-force attacks on your WiFi password) or perform man-in-the-middle attacks on unencrypted local traffic (though VPN covers internet-bound data).
  • You’ll miss out on WiFi6’s performance benefits, even if devices are close — more on that below.
• Key check: Make sure the ER-605 integrates smoothly with your old router. You’ll likely set up the switch as the multi-WAN gateway, feeding internet to your old router’s WAN port. Confirm this setup won’t disrupt your VoIP service (most WAN switches support basic routing that plays nice with VoIP, but double-check your old router’s compatibility).

Option 2: Keep the AX1800 + Add a WAN Switch #

• Pros:
  • Better wireless security: WPA3 is significantly harder to crack than older standards (it resists brute-force password attacks better and offers enhanced privacy for open networks, though you’re using a private network).
  • WiFi6 isn’t excessive, even at 10 feet: WiFi6 isn’t just about raw speed — it improves connection stability when multiple devices are connected, reduces latency (great for video calls, gaming, or IoT devices), and uses bandwidth more efficiently. Even with devices close by, if you have several gadgets running at once (phones, laptops, smart home devices), WiFi6 will deliver a smoother experience than older WiFi standards.
  • You get dual internet connections plus a modern, secure wireless network.
• Cons:
  • Higher upfront cost, since you’re keeping the AX1800 and buying a WAN switch.

Final Recommendations #

• Go with Option 1 if: Budget is tight, you prioritize dual internet access over top-tier wireless security, and your local network has few devices or you’re comfortable with the minor security tradeoff of older WiFi (just make sure you’re using the strongest available protocol on your old router — ideally WPA2-PSK with AES encryption, avoid WEP or WPA).
• Go with Option 2 if: You want the best possible wireless security (WPA3) and network performance (WiFi6), even if devices are close, and you can afford the extra cost. It’s a future-proof setup that will handle more devices better and keep your local wireless link secure.

备注：内容来源于stack exchange，提问作者sit123