What is a default gateway?

What is a default gateway?

• A. The router interface a host uses to reach destinations outside its local subnet
• B. The DNS server for domain resolution
• C. The IP address of the next hop on the same subnet
• D. The broadcasting address for the subnet

Answer: (D)

The default gateway is the router interface on your local network that hosts use to reach destinations outside their own subnet. When a device sends a packet, it checks whether the destination is in the same subnet. If it isn’t, the packet is sent to the gateway’s IP address on the local network, and the gateway forwards it toward the destination or toward the internet. For example, a computer on 192.168.1.0/24 with gateway 192.168.1.1 will send traffic destined for anything outside 192.168.1.0/24 to 192.168.1.1. The DNS server, by contrast, resolves domain names to IP addresses and isn’t involved in routing. The broadcast address is used to reach all devices on the subnet, not to route a specific destination. The concept of the next hop on the same subnet can describe a gateway, but the key idea is that the default gateway provides the path to networks beyond the local subnet.

The default gateway is the router interface on your local network that hosts use to reach destinations outside their own subnet. When a device sends a packet, it checks whether the destination is in the same subnet. If it isn’t, the packet is sent to the gateway’s IP address on the local network, and the gateway forwards it toward the destination or toward the internet. For example, a computer on 192.168.1.0/24 with gateway 192.168.1.1 will send traffic destined for anything outside 192.168.1.0/24 to 192.168.1.1.

The DNS server, by contrast, resolves domain names to IP addresses and isn’t involved in routing. The broadcast address is used to reach all devices on the subnet, not to route a specific destination. The concept of the next hop on the same subnet can describe a gateway, but the key idea is that the default gateway provides the path to networks beyond the local subnet.