How does a router divide a subnet, and what is a subnet? What kind of IP can be divided into subnets

That's not true.

VLAN and IP subnet are not the same concept.

Divide the VLAN, which can be:

Port-based VLANs, subnet-based VLANs, MAC address-based VLANs, protocol-based VLANs, etc.

Because routers are working at the network layer.

In terms of the principle of a router, each interface of the router forms a different subnet;

The interface of each router is configured with the IP address of a different network segment.

Serves as the default gateway for the CIDR block.

Therefore, each interface is connected to a different subnet;

A broadband router is a hybrid of a router and a switch, and its LAN interface is the switch interface, which forms a network segment. Since the WAN interface forms another network segment, the WAN interface and the LAN interface cannot be on the same network segment when configured.

Each VLAN is a subnet, and each interface of a router is a network segment.

What kind of router are you, it's not a subnet.

They are two standard Class C networks in their own right.

If your router has two LAN ports, you can directly assign these two addresses to different ports.

If you're doing it with one arm.

These two network segments are encapsulated.

Is that okay?

Computers in the same VLAN can ping each other, if there is no router, although it is in the same network segment, but not in the same VLAN. But they can't communicate with each other.

For example, it can be divided into several subnets according to the different subnet masks, and different subnets cannot communicate without routes.

Subnet division definition: Internet organizations define five types of IP addresses, including A, B, and C. There are 126 Class A networks, and each Class A network may have 16777214 hosts that are in the same broadcast domain.

It is not possible to have so many nodes in the same broadcast domain, and the network will be saturated with broadcast traffic, resulting in a large number of 16777214 addresses not being allocated. Class-based IP networks can be further divided into smaller networks, with each subnet defined by a router and assigned a new subnet network address, which is created by borrowing the host portion of the class-based network address. After dividing the subnet, the subnet is hidden by using a mask so that the network does not change from the outside, which is the subnet mask.

Subnet division refers to the division of an IP address range, rather than a specific IP address.

First, calculate the number of subnets to the nth power of the formula = 2 to obtain n=4, so borrow 4 bits from the third host bit as the network bit.

Subnet Valid IP address range Broadcast address.

And so on. And so on.

And so on. And so on.

And so on. And so on.

And so on. And so on.

And so on. And so on.

This is implemented on the switch via VLAN, and the gateway can be implemented with the first or last OR OR.

And so on.

First of all, dividing subnets is a logical operation, and the router is responsible for connecting several different subnets to each other so that they can communicate with each other. Moreover, the subnet mask only determines the size of the subnet divided, which has nothing to do with routing.

That's right, the router also needs to set the IP address, default gateway and subnet mask.

Upstairs, the topic should be divided into 4 subnets, borrowing 2 digits is enough, you borrow 4 digits, 16 subnets, funny!