short note on HUB?

Question

brief note hub

Answer 1

A hub is like a switch- it connects multiple computers and allows them to communicate with each other. Hubs ae older technology and not as "smart" as switches. Hubs have no idea which computer a packet of data is intended for, so they broadcast on every port. With hubs, only one device can talk at a time, and overall speed is reduced the more devices you have connected.

In short, forget the hub and get a switch instead :)

Answer 2

Short Note On Hub

Answer 3

Hi *.

A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.
A passive hub serves simply as a conduit for the data, enabling it to go from one device (or segment) to another. So-called intelligent hubs include additional features that enables an administrator to monitor the traffic passing through the hub and to configure each port in the hub. Intelligent hubs are also called manageable hubs.

A third type of hub, called a switching hub, actually reads the destination address of each packet and then forwards the packet to the correct port.

Answer 4

An Ethernet hub or concentrator is a device for connecting multiple twisted pair or fiber optic Ethernet devices together, making them act as a single segment. Hubs work at the physical layer (layer 1) of the OSI model. The device is thus a form of multiport repeater. Ethernet hubs are also responsible for forwarding a jam signal to all ports if it detects a collision.

Hubs also often come with a BNC and/or AUI connector to allow connection to legacy 10BASE2 or 10BASE5 network segments. The availability of low-priced Ethernet switches has largely rendered hubs obsolete but they are still seen in older installations and more specialist applications.

u can also refer here 4 more details

http://en.wikipedia.org/wiki/Ethernet_hub

Answer 5

HUB- It is an electronic device which is use to connect more than two computers in LAN. Computers limit depands on the number of ports in HUB. It is of two types
a) Active Hub
b) Passive Hub

Passive hub don't require external power supply from power sockets. It can work only onpower it get from network cables.


Active hub require additional DC power supply for working.

The main diffrence in working of active hub and passive hub is that passive cannot work as a repeater while active hub can means active hub can regenerates weak signals in to strong but passive hub cannot do that.

WOrking method : HUB work on broadcast method means it will broadcast evey information on all ports.

For Ex:- You have five computetrs connected in your LAN,Now computer no.2 requires something from computer no.5, then HUb will broadcast this information on all ports, regardless that on which ports computer no.2 and 5 are connected. This makes congestion in network traffic and collision of data packets occurs more frequently. Hence, speed of DATA transfer in network get slow.

Answer 6

HUB is a network devices which is used to form a small workgroup.
HUB is a Interconnect Lan.
HUB is used to connect to hetrogeneus network.
In a Lan if any node fails other are not disturbed.
But HUB is not intelligent as compare to Switch because whenever any packet are been sent from source to destination it checks for every node. but in switch only first time it checks the address.There are three types of HUB
active, passive,, hybrid.

Answer 7

the hub means "the centre of a given activity"

in office networks each computer is connected to a socket on the wall which is wired to a single central node (patch panel) each patch panel end of the wall socket wire is connected into hubs (with 24 or even 48 ports) which is then connected to a router and out to the internet

wireless routers are effectively wireless hubs also as more than one computer can connect to them

in usb its used to house more usb ports which all go out a reversed usb port to the pc

in telecoms its used to connect many internal phones to a central point in which it then connects to a internal call router and also out to the phone companies' call routing centre (switchboard as we commonly call them) and then out to the rest of the world

Answer 8

HUB.