What are network hubs?

Network hubs are central components of local network areas (LAN). A basic understanding of Lans is required to understand the task of network hubs. Whenever one or more computers are connected together, a LAN is created. LAN can be vital at work, but can also be useful at home. The purpose of connecting computers in LAN is to share sources such as files, printer, scanner or Internet access.

There are four components in the base mushroom cable network:

Ethernet Wire : This is a physical cable that connects computers together that allow them to talk to each other. The Ethernet cable, also called Twisted Pair or 10 Base T , is connected to a network card located on each computer in LAN. The back of the card has a port for one Ethernet cable. Newer computers usually have network cards.

network hubs : The network hub is a box for connecting with several ports at the back for admissionEthernet cables that are connected to each computer in LAN. With Ethernet cables from everyone to the hub, all computers are connected to the hub.

Networking Software : Most operating systems today come up with built -in network software, but software is also available from third parties. The software works with hardware and creates a network environment on each computer, allowing the user to see shared files and recourses. It also allows network management.

with a group of computers connected to a hub and installed software can talk to computers. The HUBS network sends all the operation that comes through the hub into all machines or nodes connected to the LAN. Each co -group/node to LAN will have its own address called MAC address. Each node ignores any operation that is not addressed to its MAC address.

Network hubs are simple devices that are in most cases fine, but are not considered for optimal environment in the workplace. Network hubs can only operate in half duplex mode-the counting cannot receive and send transmissions simultaneously. Another disadvantage is that network hubs send traffic without distinction to all ropes. This opens the door to security problems, making it easier to use the so -called "sniffers packet sniffers", such as Snoop on all network traffic.

Alternative to network malls is the use of network switches. The switches fill the same function as the hubs, but work at faster speeds due to full duplex functionality. This allows computers in LAN to send transmissions when they receive them. In addition, the switches do not send all traffic to all machines, but send information to a specific MAC address. This not only provides a somewhat safer network, but also limits the trap width.

6 it eliminates itThe need for a hub or switch because the router connects to LAN via the Internet. These routers also have a firewall gateway and filtering ability to increase security.

Network hubs were all, but were gradually discarded, with switches becoming at a more reasonable price. 5-Portoport The switch can be sold only $ 30 or less. In general, the more ports will be connected, the more expensive the device will be.