Interrupter Hub Switch The role and difference of routers, please answer in as much detail as possib

When two different types of networks are connected to each other, a router must be used. For example, LAN A is a token ring network, and LAN B is an Ethernet, so you can use a router to connect the two LANs together.

The hub is a kind of repeater, and its difference is only that the hub can provide more port services, so the hub is also called a multi-port repeater. The hub is designed to optimize the network cabling structure and simplify network management. A hub is the smallest unit that centrally manages a network, and like the trunk of a tree, it is the meeting point for the branches.

The main differences between a router and a hub are:

1. The most essential difference between the two is that the function of the hub occurs at the first layer (physical layer) of the OSI reference model, which is completely transparent to the higher-layer protocol, while the function of the router occurs at the third layer (network layer).

2. When a link is not available, the router will select a good link to complete the communication. In addition, the router has the ability to choose the shortest path. Hubs, on the other hand, can only "extend" the distance of the network and play an amplifying role in network data transmission.

3. Due to the complexity of the router, its transmission speed is slower than that of the hub.

Resources.

A hub is a physical setting, simply put, it is a multi-purpose socket, but it is not used to power appliances, but is used to connect multiple computers, and the computers connected under the hub share the bandwidth of the hub. The function of the switch is similar to that of the hub, but the working principle is different, the switch is an electronic device, it can establish different data channels, do not interfere with each other, so, the same 10m hub and switch, the bandwidth is not the same, now the low-end switch and the hub are not much different, if it is not a special requirement of the network (such as the flow ** network), it is best to choose the switch. The router and the above two devices have completely different functions, two computers that are not in the same subnet cannot communicate, and the main function of the router is to route between several different networks so that they can be connected.

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Ethernet's hubs and switches are hubs for data transmission. The hub collects and amplifies the signal and transmits it to all other ports, that is, the transmission line is shared. The switch can select the destination port, which greatly reduces the occurrence of collisions and provides an exclusive line for both sides of the communication.

Question: Then I would like to ask what is a straight line, what is a cross line, and what is the difference between them in terms of use.

Straight line: also known as positive line or standard line, both ends of the line using 568B as the line standard, note that both ends are the same line sequence and one-to-one correspondence.

Straight-through lines are the most widely used between different devices, such as routers and switches, PCs and switches, etc.

Crosswires are generally used to connect the same device, such as routing and routing between computers and computers.

QuestionI have one last question, what is the need for network hardware to require common network equipment and interconnection media.

Equipment, what is called interconnection medium, say the networking office.

Common network hardware includes network cards, relay stations, hubs, bridge connectors, switches, and routers.

QuestionI have one last question, what is a network device, what is an interconnection medium, and the common network equipment and interconnection medium required for networking.

Answer: The main device that enables the interconnection between LAN and WAN is the router. A router is a hardware device that connects two or more networks, acts as a gateway between networks, and is a dedicated and intelligent network device that reads the address in each packet and then decides how to transmit it.

Thank you, teacher, for your question.

This question can be viewed this way.

The repeater is used to amplify the signal, that is, the signal will be attenuated during long-distance transmission, so it can make the signal better.

Hubs, bridges, and switches can be classified into one category, they can all make a network port become a plurality of network ports, but the role of the hub is that a pure network port becomes two network ports, switches and bridges can also divide the conflict domain domain in addition to the appeal function, generally speaking, the line connected by a switch port will not conflict with the line out of other ports in the signal transmission process, the router is more complete than the switching function, not only has all the functions of the switch, but also can divide the broadcast domain, Generally speaking, the difference between them is that if you hang a printer or video screen on any port of a switch that is purely a switch, then all other ports that even call the replacement can use this printer or view this video, but if you do this on any port on the router, then other ports cannot use this printer or view this video.

The appeal examples are not very rigorous, but they are explained in layman's terms, and as you get to know them, you will understand their role more deeply.

I wish the landlord to go further and further on the road of IT.