A wireless router is a router for users to access the Internet with wireless coverage.
The wireless router can be viewed as a repeater that forwards the broadband network signals from the home wall to nearby wireless network devices (laptops, wifi phones, tablets, and all devices with WIFI) via the antenna.
Popular wireless router on the market generally support the line xdsl / cable, dynamic xdsl, pptp four access methods, it also has some other network management functions, such as dhcp service, nat firewall, mac address filtering, dynamic domain name and other functions.
Popular wireless routers on the market can only support 15-20 devices within the same time online use.
The general wireless router signal range is 50 meters radius, and now there are some wireless router signal range reached a radius of 300 meters.
Wireless Router (Wireless Router) is like a simple wireless AP and broadband routers into one of the expansion of the product, it not only has a simple wireless AP all functions such as support for DHCP client, support VPN, firewall, support for WEP encryption, But also includes the network address translation (NAT) function, can support the LAN user's network connection sharing. Can achieve the home wireless network Internet connection sharing, to achieve ADSL, Cable modem and residential broadband wireless access to access. Wireless router can be directly connected with all Ethernet ADSL MODEM or CABLE MODEM can also be used in the switch / hub, broadband router and other local area network access. Its built-in simple virtual dialing software, you can store user name and password dial-up Internet access, you can achieve dial-up access to the Internet ADSL, CM and other automatic dialing function, without manual dialing or take a computer to do the server. In addition, the wireless router generally also has a relatively better security protection.
3G router mainly in the original router embedded wireless 3G module. First of all, users use a fee card (USIM card) plug 3G router, through the operator 3G network WCDMA, TD-SCDMA and other dial-up networking, you can achieve data transmission, Internet and so on. Router has WIFI function to share the Internet, as long as the mobile phone, computer, psp wireless card or with wifi function can access the Internet through the 3G wireless router, wireless LAN to achieve sharing of 3G wireless network provides a great convenience. Some manufacturers also have a wired broadband interface, no 3G can also access the Internet. Through the 3G wireless router, you can achieve broadband connectivity, to meet or exceed the current ADSL network bandwidth, in the Internet and other applications become very wide.
Wireless router security settings
Relative to the wired network, through the wireless local area network to send and receive data more easily eavesdropping. Design a complete wireless LAN system, encryption and authentication is a security factor to consider. The most fundamental purpose of applying encryption in wireless LANs is to enable wireless services to achieve the same level of security as wired services. In response to this goal, the IEEE802.11 standard uses the WEP (Wired Equivalent Privacy) protocol to set up a dedicated security mechanism for service flow encryption and node authentication. It is mainly used for confidentiality of link layer information data in wireless LAN. WEP uses symmetric encryption mechanism, data encryption and decryption using the same key and encryption algorithm. WEP uses an encryption key (also known as a WEP key) to encrypt the data portion of each packet exchanged on the 802.11 network. When encryption is enabled, two 802.11 devices need to communicate and must have encryption and have the same encryption key. WEP encryption is disabled by default, that is, not encrypted. Wireless security parameters are optional settings, generally have three parameters, respectively, as follows:
⑴ WEP key format: hexadecimal digit; ASCII characters.
⑵ WEP encryption level: disable encryption; 40 (64) bit encryption; 128 bit encryption. The default value is Disable Encryption.
⑶WEP key value: set by the user.