What Connects ISPs? Understanding Internet Exchange Points

The physical infrastructure that provides interconnections between ISPs is an Internet exchange point (IXP).

An IXP is a physical location where multiple ISPs connect their networks to exchange internet traffic directly. This allows for faster and more efficient routing of data, reducing latency and improving internet performance.

Other options are incorrect because:

• A demarcation point is the boundary between a customer's network and an ISP's network.
• A central office is a facility where an ISP houses its equipment and provides services.
• A point of presence (PoP) is a location where an ISP has equipment and provides services to customers in a specific area.