Which of the following is a default gateway in a home network?

A firewall protects a network from unauthorized access, but it is not typically the default gateway itself, although a router may contain firewall functionality.

A switch connects devices within the same local network segment and does not route traffic between different networks.

A router in a home network acts as the default gateway, which is the network node that all IP traffic from the local network segment is sent to if its destination is not within the same local network. It is responsible for forwarding packets between the internal home network and external networks, such as the internet.

A hypervisor is software that creates and runs virtual machines, completely unrelated to network routing in a home network.