How do you understand this sentence of cisco? What is the command? 10

Cisco's NAT divides addresses into:

1.Internal local addresses (similar to your host1 address, i.e. private addresses), these are the addresses assigned to the internal device and will not be advertised to the external network.

2.Internal global addresses (such as some public addresses assigned to you by ISP), these addresses are simply the addresses set by your border router, of course, they can also be used internally, that is, they are used to replace the addresses used by you for NAT and the like.

The simple and clear meaning is to use the address in the internal global address pool, and use NAT to replace the address in these address pools with the local address (host1's address) in your intranet as the external public www server address.

If you just make a static assignment, the command is very simple, first declare the inner and outer interfaces on the boundary: for example, the command for the interface connected to the ISP is ip nat outside, and the interface connected to the internal network is ip nat inside

Then under ip nat inside source static globally

If what you need is the meaning of the following paragraph: I can understand that it is to select an IP from the IP of that segment as the address for external access instead of the public address of your host1.

The question asks for a static NAT, and the following is dynamic.

Take a look at the NAT technique and you'll understand.

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?The most basic is the above one, in the system, can be at any time?

The first command is to do port mirroring, which maps the session information on po5 to gi0 15, which is usually used to monitor the attack information on the source port.

The first of the second command: If there are two routers in a network segment, and one of them is the default gateway, but the host you want to access is connected to the other router, if the first command is enabled, the packet will be sent directly to the router connected to the IP you want to access, without going through the default gateway, and if this function is disabled, the packet will be forced to be sent through the default gateway.

The second is the prohibition of unreachability, which is generally displayed as a timeout.

The third is to prohibit direct broadcasting, if this function is enabled, the broadcast information of other network segments will no longer be affected by the router separating the broadcast domain.

The fourth is to disable ARP**, if enabled, the router will replace the corresponding ARP request on behalf of the host.