Wireless Access Point

Source: Internet
Author: User

What does Wireless Access Point know about Wireless network AP? Do you want to know what types of wireless network APs are available? What is the difference between it and a wireless router? Read this article to solve these problems. Hope to help you. 1. Wireless Network AP and wireless route wireless network AP, that is, Access Point, that is, wireless Access Point. In short, it is a wireless switch in a wireless network. It is an access point for mobile terminal users to access a wired network and is mainly used for home broadband and enterprise internal network deployment, wireless coverage ranges from dozens of meters to hundreds of meters. Currently, the main technology is the 802.11X series. An AP in a wireless network also has an access point client mode, that is, the AP can be connected wirelessly to expand the coverage of the wireless network. In a typical WLAN environment, there are mainly devices that send and receive data, which are called Access Point/hotspot/Network Bridge (Access Point: AP ). Generally, an AP can connect to multiple wireless users in the range of dozens to hundreds of meters. When both wired and wireless networks are available, an AP can connect to a traditional wired network through a standard Ethernet cable. It serves as a bridge between a wireless network and a wired network. Its main function is to connect various wireless network clients, connect the wireless network to Ethernet. This is also the main application method currently. For example, a computer connects to an AP through a wireless network card, and then connects to the Internet through a broadband network such as AP and ADSL. In addition, the AP has the network management function and can monitor the wireless network card. In theory, an AP can support a Class C workstation. However, to ensure that each workstation has sufficient bandwidth, it is recommended that an AP support 20-30 workstation. Currently, most wireless APS support multi-user access, data encryption, and multi-rate transmission. Some products provide comprehensive wireless network management functions. For a small-range wireless LAN such as a home/office, generally only one Wireless AP is needed to achieve wireless access to all computers. The indoor coverage of an AP is generally 30 m-100 m. Currently, many AP products can be interconnected to increase WLAN coverage. It is also because each AP has a certain coverage limit, just as the mobile phone can roam between base stations, the wireless LAN client can also roam between APs. 2. Currently, wireless network AP can be divided into two types: Hybrid AP and extended AP. Because of the absence of the routing function, the AP is equivalent to a wireless switch and only provides a wireless signal transmission function. Its working principle is to transmit network signals through twisted pair wires, compile wireless network AP, convert electrical signals into radio signals, and form wireless network coverage. The network coverage varies depending on the power. Generally, the maximum coverage distance of an AP in a wireless network is 400 meters. Extended AP is what we often call a wireless router. A wireless router, as its name implies, is a router with a wireless coverage function. It is mainly used for Internet access and wireless coverage. The routing function enables Internet Connection Sharing in the home wireless network and wireless shared access between ADSL and residential broadband. It is worth mentioning that the wireless and wired terminals can be allocated to a subnet through a wireless router, so that various devices in the subnet can exchange data conveniently. For extended AP, they can be interconnected within a short distance. If the distance to be transmitted is relatively long, you need Wireless Bridges, dedicated antennas, and other devices to help. In terms of appearance, the two are basically similar in length, which is indeed difficult to distinguish. However, I believe that careful users have already seen the difference between the two, right, that is, their interfaces are different. A balanced wireless network AP usually has a wired RJ45 network port, a power interface, and a Configuration Port (USB port or configured through the WEB interface) with fewer indicators; the wireless route has four more wired ports. In addition to one WAN port, the four LAN ports are used to connect to the upper-level network devices. The four LAN ports can be used to connect to computers in the Intranet, and the indicators are naturally more. 3. WDS is a wireless hotspot distribution system. It is a special function in wireless network AP and wireless routing. In short, it is the AP relay and bridging function, it can implement communication between two wireless devices and play a role in amplifying signals, and the product SSID can also be different. This is a very practical function. For example, there are three neighbors, each of which has a wireless route or AP that supports WDS, so that wireless signals can be covered at the same time, this makes communication easier. Note that the WDS devices supported by the wireless routing of each brand are limited (generally 4-8 devices are supported). The WDS functions of different brands may not be linked successfully. 4. Wireless Network AP features an important feature of AP is relay. The so-called relay is to enlarge the wireless signal once between two wireless points, this allows remote clients to receive stronger wireless signals. For example, if I place an AP at point A, and there is a client at point C, there is a 120-meter distance between them, and the signal from point A to point C has weakened a lot, so I put an AP at in the middle as a relay, so that the signal of the client at can be effectively enhanced, ensuring the transmission speed and stability. Another important feature of AP is bridging. Bridging is to link two endpoints for data transmission between two wireless network APs. to connect two wired LAN networks, generally, I use AP for bridging. For example, I have a wired LAN consisting of 15 computers at point A, and a wired LAN consisting of 25 computers at point B, but the distance between the two points of AB is far away, more than 100 meters, and it is no longer possible to connect through a wired connection. How can we connect the two local networks together? In this case, you need to set up an AP at each of the points A and B to enable the AP bridging function so that the LAN at the Point B can transmit data to each other. Note that APS without the WDS function do not have wireless signal coverage at the second point after bridging. The last feature is the "master-slave mode". In this mode, the AP will be considered as a wireless client by the master AP or wireless route, such as a wireless Nic or wireless module. In this way, it is convenient for the network management to manage the sub-network in a unified manner and achieve one-to-many connection. The AP client is multi-point, and the wireless route or master AP is one point. This function is often used in the connection between a wireless LAN and a wired LAN. For example, a is a wired LAN composed of 20 computers, and B is a wireless LAN composed of 15 computers, point B already has a wireless route. If a wants to connect to point B, add an AP at point a, enable the master-slave mode, and connect the AP to the switch at point, in this way, all the computers at point A can connect to point B. 5. The application of the wireless router is actually the AP + routing function of the wireless network. Now many wireless routers have the AP function. If your home is ADSL or residential broadband, you should select a wireless route instead of a wireless network AP to share the network. If your home has a router, you can buy a wireless network AP, for average home users, I strongly recommend that you select a wireless router. In the SOHO office environment, a wireless route can meet your needs. Through the integrated broadband access router and wireless network AP function, it can easily achieve wireless network connection. A wireless router generally includes a network address translation (NAT) protocol that supports network connection sharing, which is very useful for soho offices. A wireless router has a basic firewall or information packet filter to prevent port scanning software and other attacks against broadband connections. In addition, the four wired ports of the wireless router are also very useful. It can connect several wired PCs, which is very useful for managing routers or shared printers.

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