Why did Taylor's IP address change after switching from AT&T to Verizon?

Why did Taylor's IP address change after switching from AT&T to Verizon?

• A. The new router resets its MAC address
• B. The ISP assigns a different pool of IP addresses.
• C. The DNS records changed
• D. The device's hardware changed

Answer: (B)

Public IPs are assigned by the Internet Service Provider from their own pool of addresses. When you switch from AT&T to Verizon, you’re now on a different network with its own address block, so your router gets a new public IP from Verizon’s pool. DNS changes or hardware changes don’t determine the public IP in the same way, and a different router doesn’t automatically mean a new IP unless the ISP assigns one from a different pool. The key idea is that the ISP controls the IP address by allocating from their address pool, and moving to a new provider means a new pool.

Public IPs are assigned by the Internet Service Provider from their own pool of addresses. When you switch from AT&T to Verizon, you’re now on a different network with its own address block, so your router gets a new public IP from Verizon’s pool. DNS changes or hardware changes don’t determine the public IP in the same way, and a different router doesn’t automatically mean a new IP unless the ISP assigns one from a different pool. The key idea is that the ISP controls the IP address by allocating from their address pool, and moving to a new provider means a new pool.