Recently, people often ask me: What is the difference between "wireless AP" and "wireless sim card router"? In order to allow more friends to distinguish the difference between "wireless AP" and "wireless sim card router", today's feature article will explain to you what "wireless AP" and "wireless sim card router" are, and their functions, Differences in application scenarios, performance, and security.
1. The concept of wireless sim card router:
A wireless sim card router is a combination of a simple AP and a broadband router; with the help of the router function, it can realize the sharing of Internet connections in the home wireless network, and realize the wireless shared access of ADSL and residential broadband. Its wireless and wired terminals are all assigned to a subnet, so that various devices in the subnet exchange data very conveniently. To put it simply, a wireless sim card router is a collection of APs, routing functions and switches. It supports wired and wireless to form the same subnet and is directly connected to the MODEM.
2. Introduction to static routing table:
The main job of a router is to find an optimal transmission path for each data frame passing through the router, and to efficiently transmit the data to the destination site. It can be seen that the strategy of selecting the best path, that is, the routing algorithm, is the key to the router. In order to complete this work, the relevant data of various transmission paths - Routing Table (Routing Table) is saved in the router for use in routing. For example, the routing table is like the map we usually use, which identifies various routes. The routing table stores the information of the subnet, the number of online routers, and the name of the next router. The routing table can be fixed by the system administrator, or dynamically modified by the system, automatically adjusted by the router, or controlled by the host.
2.1 Static routing table:
The fixed routing table set in advance by the system administrator is called a static routing table. It is generally preset according to the network configuration when the system is installed, and it will not change with future network structure changes.
3. The working principle of the router
No matter how complicated the network is, the router actually does only a few steps, so the working principle of the whole router is basically the same.
A wireless sim card router is essentially a router. We usually use a broadband router to communicate with a computer using a network cable, while a wireless sim card router uses radio waves to transmit data, but it also uses a network cable for Internet access.
For example, if a wireless sim card router is equivalent to our common router, then the wireless access point (AP) is equivalent to our common switch.
A simple wireless AP is a wireless switch that only provides a function of wireless signal transmission. The working principle of the simple wireless AP is to transmit the network signal through the twisted pair cable. After the compilation of the AP product, the electrical signal is converted into a radio signal and sent out to form the coverage of the wireless network. According to different power, it can achieve different degrees and different ranges of network coverage.
A wireless sim card router is like an extended product that combines a simple wireless AP and a broadband router into one. It not only has all the functions of a simple wireless AP, such as supporting DHCP client, VPN, firewall, and WEP encryption, etc., but also includes The network address translation (NAT) function can support the sharing of network connections for LAN users. It can realize the Internet connection sharing in the home wireless network, and realize the wireless shared access of ADSL and residential broadband.
If the wireless access device also integrates the routing function, it can also be used as a wireless sim card router. Just like the current Layer 3 switches.
The focus of the wireless access device is mainly in the aspect of wireless access, providing a large distance, a strong signal, and a large number of users that can be brought.
The wireless sim card router integrates all the functions of the wireless access device, such as supporting DHCP client, VPN, firewall, WEP encryption, etc., and also includes the network address translation (NAT) function, which can support the network connection sharing of local area network users. It can realize the Internet connection sharing in the home wireless network, and realize the wireless shared access of ADSL and residential broadband. For example: your home is within the coverage of the wireless broadband network, you only need to get a wireless sim card router and a wireless network card to access the Internet, which can be dynamic IP or static IP.
4. The difference between wireless AP and wireless sim card router
To understand the difference between a wireless AP and a wireless sim card router, we must first understand what products are "wireless AP and "wireless sim card router"?
The full name of AP is Access Point. The wireless AP we often say generally refers to enterprise-level wireless AP, which is also called "thin AP". Its signal transmission range is spherical, so it is recommended to place it at a high place during construction to expand the coverage area.
A wireless sim card router, also known as a "fat AP", generally refers to our home wireless sim card router, which refers to a router with wireless coverage that is used for users to surf the Internet.
What is the difference between a wireless AP (thin AP) and a wireless sim card router (fat AP)?
4.1 Functional differences:
The wireless AP (thin AP) itself cannot be directly connected to the Internet. It needs to be used with AC products. The function of the wireless AP is to convert the wired network into a wireless network. The popular saying and understanding is: the wireless AP is connected to the wired network. and wireless network bridge.
A wireless sim card router is a combination of a "simple AP" and a broadband router. With the help of the routing function, it can realize the sharing of Internet connections in the home wireless network. It can also be understood as a repeater. The outgoing broadband network signal is forwarded to nearby wireless network devices (laptops, Wi-Fi-enabled mobile phones, and all Wi-Fi-enabled devices) through the antenna, which is a product that can directly convert a wired network into a wireless network.
4.2 Differences in application scenarios:
Wireless APs are generally used in medium and large-scale wireless network construction. A certain number of wireless APs are combined with AC products to form a larger wireless network coverage. The usage scenarios are generally large shopping malls, supermarkets, scenic spots, hotels, corporate offices, etc.
Wireless sim card routers are generally used in small wireless network construction and can work independently without the cooperation of AC and other products. Wireless sim card routers are generally used in home or home office scenarios.
4.3 Differences in performance:
The wireless AP can be centrally managed with AC (wireless controller) products, which can centrally manage thousands of wireless APs, and realize the roaming function. Under the circumstance that the network is fully guaranteed not to drop, the wireless network covers a wider area.
Wireless sim card routers cannot be centrally managed, and need to be configured individually. The configuration work is cumbersome, and the roaming function cannot be performed. The wireless network coverage area is limited and the network is prone to disconnection.
4.4 Differences in advanced functions:
The wireless AP cooperates with the AC product to perform wireless network roaming and radio frequency optimization, with full signal coverage and network stability without interruption; the wireless AP can also cooperate with the AC product to perform wireless network marketing functions, so that visitors connected to the wireless network can receive all the wireless AP information. Pushed ads.
4.5 Differences in security:
The wireless AP adopts a variety of authentication methods, increases the detection and processing mechanism, and greatly improves the security of the network based on security policies such as users and user locations.
Wireless sim card routers are traditional encryption and authentication methods, with general security.
