What is HUB, short for what HUB?

Active 2Passive 3Hybrid.

1.Kinetic energy type: It has the effect of regenerating and amplifying the signal on the connected network medium, which can make the length of the connected medium reach the maximum effective length, and needs a power supply to work.

2.The passive type only acts as a connector and does not require a power supply to operate, which is no longer common in the market. 3.

Hybrid: Multiple types of cables can be connected, such as shafts and twisted pairs.

The hub is an important tool for centralized management of the network, and like the trunk of a tree, it is the meeting point of the branches. The hub is a shared device, and its essence is a repeater, and the main function of the repeater is to regenerate and amplify the received signal to expand the transmission distance of the network. In the network, the hub is mainly used for the construction of shared networks, and is the best and most economical solution to solve the problem of going directly from the server to the desktop.

In a switched network, the hub is directly connected to the switch and sends data from the switch port to the desktop. The hub is located at a star node of the network, and the workstations connected to the nodes are centrally managed, so that the workstations with problems will not affect the normal operation of the entire network. Since the hub plays an important role in the network, it is also very important to select it.

The English name of the hub is "hub". "hub" means "center", and the main function of the hub is to regenerate and amplify the received signal to expand the transmission distance of the network, and at the same time concentrate all nodes on the node centered on it. It works at the first layer of the OSI (Open Systems Interconnection Reference Model) reference model, the "physical layer".

When we say hub, we generally mean the smallest hub.

Hub. Simply put, it is a device that can connect n computers.

He doesn't have a routing function.

I was just passing by.

But when I saw the hub, I was shocked.

I thought it was my brother's group.

I only found out when I saw it.

It turns out that you and B have been reversed.

Ha ha!!!

hub isHub. Abbreviation. "hub" means "center slippery".

Hubs are hardware-only network bottom-layer devices, which basically do not have the intelligent memory capabilities and learning capabilities similar to switches. It also doesn't have the MAC address table that a switch has, so it sends data in a broadcast mode instead of a target. That is to say, when it wants to send data to a node, it does not send the data directly to the destination node, but packets.

HUB structure.

The external board structure of a normal hub is very simple. For example, D--Link's simplest 10BASE T EtherNetHub hub is a cuboid with an AC power outlet on the back.

and switches, an AUI interface and a BNC interface, with a row of 17 RJ-45 interfaces distributed in most of the front. On the right side of the front, there is also an LED interface indicator and an LED signal status indicator corresponding to each RJ-45 interface.

Hub is a multi-port device. HUB is just a multi-port signal amplification device, when a port receives a data signal in the work, because the signal has been attenuated in the transmission process from the source port to the hub, so the hub will shape and amplify the signal, so that the attenuated signal is regenerated (restored) to the state when sent, and the dust is followed by ** to all other ports in working state.

Uses:

The hub is mainly used for the formation of shared networks, and is the most economical solution to solve the problem from the service chakai device directly to the desktop. In a switched network, the hub is directly connected to the switch and sends the data of the switch port to the desktop. The hub is flexible in networking, it is located at a star node of the network, and the workstations connected to the nodes are centrally managed, so that the workstations with problems do not affect the normal operation of the entire network, and users are also free to join and exit.

hub

English [h b] American [h b].

n.(movable stool digging) in the jujube envy core; hub airports, hub cities; (wheel) hub, rotor blade hub (propeller, fan, etc.); The (network) hub is split.

Name] (hub) (jie) Hubu (personal name).

Phrase. Airline Hub Airport.

Ethernet Hub; Ethernet hubs.

synonyms:

focus

English [ f k s ] American [ fo k s].

n.Focus, center point; Attention, attention; Hypocenter; purpose, intent; Focal length; Focus; focusing device; Clear purpose and focus; The focal point of curves (ellipses, parabolas, etc.).

v.Concentration, attention; focusing, focusing; Linguistics focuses (or center of gravity) on (part of a sentence).

(focus) (Sweden) Phokus (personal name).

The hub is the hub.

A hub is a basic device in a data communication system, and like a transmission medium such as twisted pair, it is a hardware device that does not require any software support or requires little management software management. It is widely used in a variety of occasions. Hubs work in a local area network (LAN) environment, like a network card, and are applied to the first layer of the OSI reference model, so they are also called physical layer devices.

Working features of the hub:

According to the IEEE protocol, the function of a hub is to randomly select a device on a certain port, and let it exclusively occupy all the dusty bandwidth to communicate with the uplink devices (switches, routers, servers, etc.) of the hub. It can be seen from this that the hub has the following two characteristics when working.

First of all, the hub is only a multi-port signal amplification device, when a port receives a data signal, because the signal has been attenuated in the transmission process from the source port to the hub, the hub will shape and amplify the signal, so that the attenuated signal is regenerated (restored) to the state when it was sent, and then ** to all other ports in the working state.

Secondly, the HUB only communicates with its uplink devices (such as upper-layer hubs, switches, or servers), and the ports on the same layer will not communicate directly with each other, but will broadcast information to all ports through the uplink devices.

hub refers to a multi-port device.

Hub is a multi-port device, in the hub as the central device, even if a line in the network fails, it does not affect the work of other lines, so the hub has been widely used in the local area network.

Most of the time it is used in star and tree network topologies with RJ45 interfaces.

Connected to various hosts (there are also BNC interfaces), there are many types of hubs according to different terms. According to the processing method of the input signal, the hub can be divided into passive hub, active hub, and intelligent hub.

The difference between an active hub and a passive hub is that it can amplify or regenerate the signal, so that it can extend the effective transmission distance between the two hosts; In addition to all the functions of the active hub, the smart hub also has network management and routing functions.

In a smart hub network, not every machine can receive a signal, only a computer with the same address as the destination address of the signal can receive it. Some smart hubs can choose the best path by themselves, which is a good management of the network.

Hub is a hub, which is the basic equipment in the data communication system, and like the nuclear transmission medium such as twisted pair, it is a hardware device that does not require any software support or requires little management software management. Hubs operate in a local area network (LAN) environment and are applied to the first layer of the OSI reference model, so they are also referred to as physical layer devices.

The hub uses electrical interconnection inside, and when the environment in which the LAN is maintained is a logic bus or ring structure, it is completely possible to use the hub to establish a physical star or tree network structure. In this regard, the hub acts as a multi-port repeater. In fact, the hub is actually a kind of Bich answer of the repeater, and the difference is only that the hub can provide more port services, so the hub is also called a multi-port repeater.