The function of home router is detailed

The communications department allows each broadband user to use two computers to share the Internet, and the user needs to install a broadband router. So, what kind of router should be purchased more appropriate?

Today's broadband router many features for the average home user is really very practical, can improve the performance of many Web applications. The following talk about the functions of home routers, by the way to tell you what the function is more practical, which features little significance:

DHCP Features:

This function is one of the essential basic functions, it through a network within a server to provide the corresponding network configuration services to achieve, can provide network terminal equipment temporary IP address, default gateway, DNS server and other network configuration. This feature of the router is generally the default is open, if not, we recommend that you open it in the management interface, so that the computer connected to the router using the network settings in the automatic access to IP settings can be online, very convenient. Of course, DHCP technology also has its drawbacks:

Random IP Address: The user's IP address is randomly assigned, with uncertainty.

Access Permissions Change: If the user's access rights are based on an IP address, the access rights vary depending on the IP address.

Inaccessible: IP addresses obtained through DHCP are uncertain and users are more difficult to access.

Application discontinuity: IP address changes can cause application disruption if the user is using the network uninterrupted between different network segments of the WLAN.

Poor security: External network users can pose a security threat to the network itself

UPnP Features:

Universal Plug and Play (UPnP) is an architecture for common Peer-to-peer network connections for PCs and smart devices (or instrumentation), especially in the home. UPnP is based on Internet standards and technologies such as TCP/IP, HTTP, and XML, enabling such devices to connect and work together automatically, making the network, especially the home network, possible for more people.

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UPnP is widespread because it is geared towards the home network, the proximity network and the network in small businesses and commercial buildings. Under the management of networked control devices, it supports data communication between any two devices. UPnP is not dependent on a particular operating system, programming language, or physical media.

This is not a very good idea, because the technology needs to be clearly explained by some additional NAT and programming knowledge, so we can simply understand that UPnP enables intranet users to implement the following applications:

Multiplayer network games (such as Warcraft and other multiplayer games)

Network peer-to-peer connection (e.g., BT download etc Peer-to-peer transmission)

Real-time communications (e.g., MSN Voice and file transfer)

Remote Assistance (one of the features of Windows XP)

Firewall Features:

This function believes that everyone is not unfamiliar, in fact, the firewall function of the home router is relatively simple, only to achieve the shielding of the internal network IP address, the free set IP address, communication port filtering, in addition, the home server filtering rules are only some of the basic data packet rejection rules, and can not achieve very good protection effect , but it can be dealt with in a typical malicious attack on the web.

The current router firewall features include anti-IP address filtering, URL filtering, MAC address filtering, IP address and MAC address binding, as well as some anti-black capabilities, security logs and so on. Through the built-in firewall function of the router, users can set different filtering rules and filter the exception packets of the Alien network.

Also need to explain, if the router turned on the firewall function or the firewall filter rules set too strict, it may cause some normal network application error, but most of the case can be safely open firewall function.

Summary one:

Above these three is a more practical function, especially UPnP, now the most new generation of various manufacturers of home routers have provided support, if the box does not indicate support for UPnP, may be the previous generation of products, not recommended to buy.

Nic MAC address mapping:

This function seems to be useless, but some college network friends may know that the school's internal network management is relatively strict, using mac-ip binding way to limit, so in this case, the router can not directly use the campus network, to open the network card MAC address mapping function, Then the binding of the net card MAC address map to the router WAN port, so that the monitoring system to the router as a binding network card, you can normally use the router.

Website Filter Function:

This feature allows the user to enter some blocked site URLs, and if an intranet user attempts to access these addresses, the router rejects the request. This function is actually to prevent children from browsing some unhealthy or unsafe sites.

Summary two:

These two features are not supported by every home router, but are sometimes more practical.

Internet access restriction function:

This function is in fact the enterprise and Internet café routers often use, but now also has begun to appear in some brands of home routers. It allows an administrator to set what IP addresses can have network access rights.

Traffic Management monitoring function:

This feature used to be a basic feature of the Internet Café Router, which allows administrators to set how the router limits the bandwidth each user occupies, and at what time the user is open, and some lists the current real-time flow chart for all users.

Print Server Features:

This function is actually the integration of print server on the router, through a dedicated print server chip and a USB interface to share a printer to all users of the LAN, the router will be connected to the USB interface of the printer assigned an IP address, Then the other LAN users can use this IP address directly to the network printer.

This function is usually the office router is available, because it needs to add chips, so the cost is high, supporting the print server function of the router than other similar products more than hundreds of pieces.

Summary three:

These functions are not practical for home users, can be said to be from other professional use of the router, especially the print server function, will cause the price of the router significantly increased, it is not very economical, if the Soho users can also be used.

Virtual Dialing Features:

This feature is a broadband router is necessary, otherwise the router can not be called broadband router, because ADSL broadband itself is the need for virtual dialing, the virtual dialing set well, after each boot, restart the router will automatically use the user entered the account password dialing, that is, as long as the router is in the working state, has been in the online state, monthly users use the virtual dialing function can save the internet every time to dial the trouble, and if it is not a monthly friend, set the virtual dial-up router will remain online year-round, that is dangerous, the net fee per month will be a large amount; if it is a community broadband, that is a LAN, Automatically acquire IP without virtual dialing.

Web Interface Management:

Now the home router is the Web interface management, the use is very convenient, as usual online operation.

Summary four:

These two functions are the most essential for broadband routers, as long as it is a broadband router will definitely support.

Summarize:

In fact, the router is equivalent to a small computer, with CPU and memory, has its own operating system and program code, well written systems and procedures can greatly improve the stability of the router and implementation efficiency. Router manufacturers in the development of these software, in order to reduce development costs, often take the same CPU Enterprise router software system to make a home router software system, we have observed several brands of home broadband routers and low-end enterprise broadband router, the software version number is basically the same, Generally only the last small bit, which is probably why so much of the home broadband routers have enterprise-class router functions. Of course, some features are unlikely to be used by home users, such as DMZ, DDNS, and virtual servers; The system core of enterprise router is relatively good, stable and efficient, and it is very beneficial to move writers, but some seemingly superfluous features will be turned off directly.