Network management basic 3 common wireless route Parameters

One of the common wireless route parameters, WAN Port

A wan is a cross-regional data communication Network that usually contains one or more countries or regions. Generally, a WAN consists of two or more local networks. Computers often use devices provided by telecom carriers as information transmission platforms. For example, they can connect to the WAN through a public network, such as a telephone network, or through a leased line or satellite.

The Internet is currently the largest WAN. Therefore, the WAN interface on the wireless router is an interface that connects to Internet devices and directly connects to the Internet. Each computer (or other network devices) on the Wide Area Network) there are one or more Wan IP addresses (or public or Internet IP addresses). Generally, you must pay the ISP for the wan ip address before applying for it. The Wan IP addresses cannot be repeated. The data exchange between a WAN and a LAN computer is performed through the NAT (Network Address Translation) of the router or gateway. 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 and Cable MODEM or Ethernet.

Common wireless route parameter 2 LAN port

A Local Area Network (LAN) is a relatively limited geographical Area, A network composed of a group of computers, servers, printers, and similar device connections. The various multi-host networks we currently use belong to this category. Each computer (or other network device) 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 can be repeated and will not affect 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 to NICs, switches, hubs, and other devices.

Common wireless route parameters 3 NAT Network Address Translation

Network Address Translation (NAT) is an Internet Engineering Task Group IETF standard used to allow multiple PCs on a LAN Network (using LANIP Address segments, for example, 10.0.x.x, 192.168.x.x, 172. x. x. x) The WAN address (IPV4) that shares a single and global route, and converts the LAN network address (such as the enterprise Intranet) to the WAN address (such as the Internet ), this hides the IP addresses managed internally.

NAT devices (or software) maintain a status table to map private IP addresses of internal networks to valid IP addresses of external networks. Each packet is translated into a correct IP address in the NAT device (or software) 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. In this way, you can use non-registered IP addresses internally and convert them into a small number of externally registered IP addresses, this reduces the cost of IP Address Registration and saves the address space (IPV4) that is increasingly lacking ). At the same time, this also hides the internal network structure, thus reducing the risk of internal network attacks.

NAT is usually integrated into various routers, firewalls, or individual NAT devices) ", WINROUTE and other gateway/Proxy Server software also have NAT functions, especially when connecting to broadband through xDSL or cable modem. NAT can be divided into three types: static NAT (staticNAT), pooledNAT, and port NAT (PAT ).

① Static NAT maps each host in the internal network to a valid address in the external network permanently, it is applicable to individual users or internal enterprise servers that provide services (such as WEB and FTP) to external enterprise networks. Static ing between internal server addresses and fixed legal addresses must be established.

② The NAT pool defines a series of valid addresses in the external network and maps them to the internal network using dynamic allocation 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 establish multiple address pools and bind them to different departments based on their access needs. This not only enhances the management granularity, it simplifies the troubleshooting process.

③ Port NAT maps internal addresses to different ports of an IP address in an external network. It is applicable to the situation where multiple users need to access the Internet at the same time due to a small number of addresses.

Wireless Routing Parameters are one of the things that must be known and understood by a network management system. With the development of wireless technology, the network management technology will also increase.