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How does/did an ISP serve so many people over IPv4

Whilst reading Tanenbaum - Computer Networks they talk about IP scarcity at the level of ISPs:

IP addresses are scarce. An ISP might have a /16 address, giving it 65,534 usable host numbers. If it has more than that, it h...

How do VPN’s forward network traffic? (Layer 3)

I am looking for some info on how VPN's (Virtual Private Network) forward network traffic through its VPS (Virtual Private Server).

Take an example where you are connected to a VPN. You make a request to a website, which the...

How do VPN’s forward network traffic? (Layer 3)

I am looking for some info on how VPN's (Virtual Private Network) forward network traffic through its VPS (Virtual Private Server).

Take an example where you are connected to a VPN. You make a request to a website, which the...

Maximum Transmission Unit 802.11ah

What is the MTU of the standard 802.11ah? I didn't find anything in literature and also on the original PDF standard.

At which layer does router operate?

I have studied from various sources that router is a layer 3 device. It does routing based on Network layer (layer 3) header, but I have a doubt.

Network address translation (NAT) is a feature of Router which is required for...

AWS direct connect with Cisco ASA redendency

We have following scenario currently and BLUE link is active and running, now i am going to get second link for redendency which is right side of diagram.

As you can see currently i have VLAN 9 (AWS direct connect) conf...

SmallNetBuilder Giveaway Results: Zyxel Multy X

The contest has ended. The winner of the Zyxel Multy X AC3000 Tri-Band WiFi System is Nathan Yanowitz.
Congratulations, Nathan! And thanks to everyone who entered.