Inherent limitations of wireless cables are difficult to replace

Wireless networks are increasingly popular with enterprises and institutions because of their convenience and limited nature. However, I believe that wireless networks have various advantages, but compared with wired networks, they still have some inherent defects. Therefore, I believe that wireless networks cannot completely replace wired networks in a short time at least. When necessary, wireless networks and wired networks should coexist and complement each other. However, some enterprises are too superstitious about wireless network technology. Even abandon the original wired network, and upgrade all to the wireless network. I think this kind of behavior is undesirable. Based on my years of experience in network design, I believe that at least the following aspects still require the existence of wired networks.

1. Connection between critical application servers and vrouters and other network devices

The current application server deployment usually involves connecting the server to a vro or vswitch, and then connecting the vro or vswitch to the client. In this case, if a wireless connection is used between the server and the vro, the connection may become the performance bottleneck of the application server. Because most applications now have access issues. At this time, each client is like a stream, which is aggregated through a router to flow to the application server. If the channels between the application server and the vro are relatively narrow, the rivers may not be able to accommodate these aggregated streams. In this case, network congestion may occur, affecting the performance of the application server.

Under the same conditions, the transmission speed of the wired network is much faster and more stable than that of the wireless network. Therefore, if you change the connection between the application server and the router to a wired network, it is like expanding the river between the application server and the router and changing the river to a river. Then it can accommodate more streams. At the same time, the data volume is much larger than that of wireless networks. In addition, servers are usually placed over there and won't be moved frequently. Therefore, there is no need to deploy wireless network connections.

Therefore, the author believes that at least some key application servers and network settings are connected, such as the connection between the Oracle database server and the router. Under the existing technical conditions, wired networks also have their value. In a short time, the infinite network technology cannot replace the wired network.

2. Connection Between the Wireless Access Point and the router

To deploy an unlimited network, a wireless router (more professional, called a wireless access point) is essential. However, enterprises often need a virtual border router to connect a wireless LAN to the Internet. That is to say, enterprises often connect to the Internet through optical fiber or ADSL dialing. Then, deploy a wireless access point in the enterprise to connect the wireless client and the router. Now the question is, how can I connect a wireless access point to a router?

Currently, most wireless networks use wired connections, that is, the connection between the Wireless Access Point and the router is still made of Wired materials such as network cables. The most important reason is the bandwidth. If a wireless network is used, it is difficult to control the number of clients in the same cell. There may be only one client in the cell, or hundreds of clients in the cell. Although the number of wireless clients can be properly controlled by adjusting the cellular size. However, the intensity of its control is far less powerful than that of wired networks. In a wired network, an interface can only connect to one host, unless other vswitches, hubs, and other extended devices are used. In addition, wireless access points are mainly used to share bandwidth.

Therefore, a relatively high bandwidth must be provided between a wireless access point and a router to meet the needs of a large number of clients for joint access. That is to say, it is necessary to use a wired network connection to improve the connection between the Wireless Access Point and the wired network.

Iii. High cost of complete substitution

If an enterprise upgrades from a wired network to a wireless network, in addition to configuring wireless access points and other devices, the most important expense may be the provision of wireless network cards. In the past, most of the hosts purchased by enterprises were desktop computers. By default, a desktop computer is not equipped with a wireless Nic. That is to say, if an enterprise needs to upgrade all clients to a wireless client, it must provide a wireless Nic for each desktop computer. This investment is not small.

Is there such a need? I believe that there is no use except to show off and fill the pockets of the suppliers. Wireless Network connections are primarily designed for mobile office purposes. That is to say, unless you want to walk around the office with a computer, then using a wireless network client will have a great value. But it's not practical to move around with a desktop computer? For this reason, I believe that it is not necessary to spend money on client computers that are relatively stable, such as desktop computers, to assign them wireless networks.

A Wireless Access Point uses a shared bandwidth. That is to say, the efficiency of wireless access points is similar to that of hubs. When the number of clients is large, the bandwidth that each client can enjoy is very limited. The wired network is different. The bandwidth of the network cable is exclusive to the client. Therefore, the performance of wired networks is much higher than that of wireless networks under the same conditions. In this case, the client of the desktop computer is upgraded to the wireless client, and the performance is not improved but decreased. Moreover, desktop computers are inconvenient to move and do not enjoy the benefits of convenience. Isn't it enough for the network administrator to find something to do?

Therefore, regardless of the cost or performance, you can upgrade all clients, especially those on the desktop computer, to wireless clients. This is often because you have to put off your pants. This has nothing to do with other purposes except for a little more show-off capital and a few piles of scrap iron. Therefore, I suggest that you consider the necessity of upgrading the client from wired to wireless. Under normal circumstances, the author's suggestion is that, unless there is a need for a mobile office, there is no need to upgrade.

4. It is best to deploy a wired network during New Decoration

I used to meet a customer who needed to renovate the office building. The author is entrusted by enterprises to take charge of their network integrated wiring project. At that time, the vice president of the company personally took charge of the project. He is a technical fan, but he is not very proficient. At the beginning, he hoped to implement all wireless networks in the enterprise. That is, you do not need to deploy the network cable in the office. You can directly deploy several wireless access points in key locations. Instead of making a statement immediately, I first learned the actual situation of the enterprise with the enterprise's network administrator. After learning about it, we found that most employees use desktop computers. Only employees at or above the management layer use laptops. During office hours, most employees still work in the old location without having to move around. Even if a meeting is required, they also use the manager's laptop to go to the meeting room. It is inconvenient to move a desktop computer. In addition, enterprises implement file servers in the network, and file sharing is also very convenient.

In response to this situation, I have different opinions on the network administrator and the Vice President. Because the current office is reinstalled, you can use a dark pipe for cabling without affecting the overall layout of the existing office. And the use of dark lines will not affect the appearance of the Office. There is no need to use wireless networks because employees do not have high requirements for office mobility. Then the author calculates an account for them. The cost of replacing a wireless network card with all desktop computers is several times higher than the cost of deploying a wired network. Of course, I cannot take this idea for enterprises. I explained these situations with the enterprise network manager and the Vice President, and ultimately they needed to make up their mind. After comparison, they decided to keep the wired network first. Wiring is required during decoration. Because the pipe threading is used, it is not only beautiful, but also conducive to future maintenance. Then, deploy wireless access points in the center of the Office to allow some employees who need to work in the office to use wireless networks.

Therefore, if the office needs to be redecorated and hidden pipe cabling can be used, I suggest you reserve an interface for the wired network. In particular, it is necessary for enterprises to leave wired network interfaces in advance when there are many computers without wireless network cards. Otherwise, it will be very troublesome to pull the cable when it is needed for later use.

All in all, I believe that at this stage, otherwise, in a relatively long period of time, wireless networks cannot completely replace wired networks. Network administrators are more realistic and responsible for enterprises to find solutions for coexistence of wireless networks and wired networks.

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