What is the difference between Prawn router, modem, switch, etc

A router is a multi-computer, only one IP, and only one network, and the router can be used to access the Internet at the same time.

The modem is what we call a cat. modem converts analog signals into digital signals. The demodulator then converts the sound signal into a digital signal that a computer can receive.

Data communication between computers can be realized through a modem and a ** line. When two computers want to transmit data through the first line, a device is needed to be responsible for the conversion of digital to analog. This digital-to-analog converter is the modem.

When a computer sends data, the modem converts the digital signal into the corresponding analog signal, a process called "modulation". Before the modulated signal is transmitted to another computer through the ** carrier, the receiver's modem is responsible for restoring the analog signal to a digital signal that the computer can recognize, a process called "demodulation".

It is through this digital-to-analog conversion process of "modulation" and "demodulation" that remote communication between two computers is realized.

The switch is also called a switching hub, which regenerates the information and goes through internal processing to the designated port, with automatic addressing ability and switching effect, because the switch independently sends each packet from the source port to the destination port according to the destination address of the transmitted packet, avoiding collision with other ports. A switch in a broad sense is a device that completes the function of information exchange in a communication system.

The switch is also called the switching hub hub, which regenerates the information and goes through internal processing to the designated port, with automatic addressing ability and switching effect, because the switch sends each packet from the source port to the destination port independently according to the destination address of the transmitted packet, avoiding collision with other ports. A switch in a broad sense is a device that completes the function of information exchange in a communication system.

Switches can be seen as a kind of intelligent hub.

Hehe, cats are dialed. I can access the Internet on a single unit.

The cat comes out to connect the router, and then you can get several machines on at the same time.

**Wire -- The cat is the modem ** becomes the Internet data signal) -- Router (if not set, the bandwidth is freely allocated, the more computers, the less each one is allocated) -- each port is connected to one computer.

You don't need a switch at home, but router setup is a technology and must be professional, if you want to learn it, look here. The principles and settings of primary and secondary routing are available.

The Chinese name for modem is modem, because the pronunciation is very similar to "cat", and it is also figuratively called "cat". Difference Between Modem and Router:

1. The role is different.

modem is a necessary equipment for computer networking, with modem computer can dial-up Internet, and router is a device that helps multiple computers share a network, with the help of router, several computers can be connected to the same network cable, however, the router is not a necessary equipment for computer Internet access, without a router, the computer can still be networked through modem.

2. The connection method is different.

Due to the different roles played, the connection mode of the two is also different, one end of the modem is connected to the first line, a section is connected to the computer or the router, and a section of the router is connected to the modem, the other end can only be connected to the computer, and the network can not be realized directly with the router connection ** line and the computer.

3. The shape is different.

The shape of the modem is relatively simple, like a flat cuboid box, very small, while the shape of the router is varied, there are cuboid shapes, there are oval shapes, the volume is larger than the modem as a whole, and the wireless router also has a number of different antenna devices.

4. The ports are different.

The shape and number of ports of the two are different, there are generally only two ports of modem, one is connected to the ** line, one is connected to the network cable, and the port of the router is more, usually there are five, one is connected to the modem, and the rest can be connected with one or more computers at will.

What the modem does:

modem belongs to the hardware equipment of the computer, the main role is to realize signal conversion, when the signal is sent, modem plays the role of modulation, the use of the transmitter to convert the digital signal into an analog signal, when the signal is received, the modem will play the role of demodulation, that is, the analog signal is converted into a digital signal, through the modem, the communication between the two computers can be realized.

What the router does:

A router, also known as a gateway, is used to connect multiple logically separated networks, and the so-called logical network represents a single network or a subnet. When data is transferred from one subnet to another, it can be done through the router's routing function. Therefore, the router has the function of judging the network address and selecting the IP path, it can establish a flexible connection in the multi-network interconnection environment, can connect various subnets with completely different data packets and media access methods, the router only accepts the information of the origin server or other routers, and belongs to a kind of interconnection device at the network layer.

The router is not a necessary tool for us to surf the Internet, but because of the convenience of wireless network, it has become one of the necessary peripherals for every household, and the modem (also called "cat"), because the importance of dial-up exists in many families, but it is not necessary, for example, the cell network uses a switch, and the network cable is to the home, which does not need a "cat", and can directly use the routing preset dialing.

Router (router) is connected to the Internet in the local area network, wide area network equipment, it will automatically select and set the route according to the situation of the channel, to the best path, in order to send signals in the order of the device, router is the hub of the Internet, "traffic police".

The difference between a cat and a router.

The cat barks at the modem, through which the computer can dial up the Internet. Connect the ** cable up, and connect the router down.

The cat and the router have something in common: they are both used to surf the Internet.

1. The cat is used for network signal transfer between different media between networks, such as converting network signals such as ADSL, optical fiber, and wired communication into standard computer network signals.

3. To put it simply, the cat is equivalent to the sub-assembly factory, the router is equivalent to the wholesale retailer, and the switch is equivalent to the logistics distribution. Therefore, if there is broadband at home, there must be a cat, there must be a router if there are multiple computers to access the Internet, if there are many computers, more than the number of interfaces of the router will need a switch to expand the interface.

Nowadays, network operators will give users a "cat" to use when they install broadband, and users need to buy routers for a little less time, and they can automatically dial up.

To put it simply: the modem, commonly known as "cat", is to convert the pulse signal transmitted from the ** line into a digital signal that can be accepted by the computer, and then convert the digital signal transmitted by the computer into a pulse signal.

What about the router, because the "cat" connects to the computer with only one network cable, and you want to connect to multiple computers, the router plays this role, plugging the cable (network cable) that connects to the computer from the "cat" into the router, and there are multiple ports on the router, and then connect (with network cables) to different computers. A few computers connected by a router form a small "local area network".

Note: There are 8 wires in the network cable and 2 wires in the ** line.

The modem seems to transfer the ** cable to the network cable and then give you an IP to surf the Internet, the router can manage the Internet IP, several people can share an IP to surf the Internet, and some devices also integrate the functions of the modem and router.

The router is used for cross-network segment communication, for example, many machines in your Internet café are a network segment, and other machines are network segments, and the machines of the two network segments cannot communicate with each other, so they can communicate with each other with routing, and they also need routers to connect with the Internet (across network segments).

The switch is just a transit, you can understand it as a tool that connects many computers together, but the computers connected to a switch can only communicate with the same network segment, and different network segments need to use a router.

The modem is easy to understand, that is, the signal is converted back and forth, the network cable can not be used before the external line access to the user, modulation is to convert the signal that the computer can recognize into the first line signal, and the demodulation is the other way around. It can only be used for outdoor transmission, so it is used.

Generally, broadband providers prohibit modems from connecting to routers, so it is not ruled out that routers are not allowed to connect.

Suggestion 1: Connect the computer directly to the modem and try whether it can directly access the Internet, if the computer can directly access the Internet, it means that there is no problem with the modem to the public network of the broadband provider; If you can't connect, just call the computer and find the provider to solve the problem.

2. If the modem is directly connected, connect the router to the modem to the Internet, log in to the router to check whether the WLAN port can get the IP address, if you can't get the IP address, then it is likely that the router is prohibited from connecting by the provider, then there is no way.

3. If the router can get the public IP, check the router LAN port settings to see if it is a router setting problem that causes the computer to be unable to access the Internet.

The above is assuming that there is no hardware issue with the modem and router.

Hope the above information is useful to you.