Three essential parameters of a universal Router

The three essential parameters of a universal router are certainly not unfamiliar with simple router settings. For some of these parameters, many people only know a rough idea. What we need to do today, it is to thoroughly describe the parameters frequently seen when setting a router. Here we use a universal router as an example, and so on for other routers. I. NAT Network Address Translation 1. NAT refers to network address translation. It is an IETF standard based on network engineering and is used to allow multiple computers on the internal network to use LANIP address segments, the external network address of the global route. The internal network address is converted to the external network address, which hides the internal IP address. Www.2cto.com 2. NAT functions are usually integrated into various routers, firewalls, or individual NAT devices, currently, most of the gateway and proxy server software in Windows, such as Internet Connection Sharing and WINROUTE, also have NAT functions, especially when the bandwidth is connected through xDSL or cable modem. 3. a nat device is used to map private IP addresses of an internal network to valid IP addresses of an external network. Each packet is translated into a correct IP address on the NAT device and sent to the next level, unlike normal routers, the NAT device actually modifies the packet header and changes the source address of the internal network to the external network address of the NAT device, the common router only reads the source address and destination address before forwarding data packets to the destination.
4. By using non-registered IP addresses internally and converting them into a small number of external registered IP addresses, this reduces the cost of IP Address Registration and saves the address space that is increasingly lacking, at the same time, this also hides the internal network structure, thus reducing the risk of internal network attacks. 5. Generally, NAT can be divided into three types: Port NAT, static NAT, and NAT pool (1) Port NAT: It is different ports that map internal addresses to an IP address of an external network, this method is applicable when the number of addresses is small and multiple users need to access the Internet at the same time. (2) Static NAT: maps each computer in the internal network to a valid address in the external network. It is applicable to individual users or internal enterprise servers to provide services outside the enterprise network, you need to create a static ing from the server's internal address to a fixed legal address. (3) NAT pool: A series of valid addresses are defined in the external network, which are dynamically allocated to the internal network to establish a dynamic conversion mechanism for internal and external addresses, it is often applicable to scenarios where the number of rented addresses is large. Individual users or enterprises can create multiple address pools and bind them to different departments based on their access needs.
2. WAN port www.2cto.com 1. WAN, that is, WAN, is a cross-region data communication network, which usually contains one or more countries or regions, generally, a WAN consists of two or more local networks. The Internet is currently the largest WAN. 2. Currently, the WAN Port provided by the wireless router is generally a 10/100 Mbps adaptive RJ45 port, which can be connected to devices such as xDSL/Cable cat or Ethernet, the data exchange between the WAN and the LAN computer is performed through the NAT of the router or gateway. 3. The WAN interface on the router is the interface connecting to the Internet. Each computer on the WAN has one or more wan ip addresses, generally, you can apply for a wan ip address only after paying the ISP.
3. LAN Port 1. LAN refers to LAN, which is also called Private Network or intranet. LAN is within a relatively limited geographical range, A network composed of a group of computers, servers, and similar devices. Most of the applications currently fall into this category. 2. Each computer on the LAN has one or more lan ip addresses. The lan ip addresses are allocated within the LAN. The IP addresses of different LAN networks can be repeated without affecting each other, currently, the LAN port on the wireless router is generally a 10/100 Mbps adaptive RJ45 port, which can be used to connect network devices such as network adapters and switches.