Network Bridge allows the connection of LAN segments cheaply and easily. A LAN segment is a section of network media that connects different teams. It is usual that a network has multiple LAN segments. Prior to Windows XP, Windows Server 2003, Standard Edition, and Windows Server 2003, Enterprise Edition, if you wanted to have a network with multiple LAN segments, had two options: IP routing and bridging hardware. IP routing required the acquisition of hardware routers or configuration of computers that act as routers, configuring IP addresses for each computer each segment of the network and the configuration of each network segment as a separate subnet. The jumper settings of hardware was not difficult, but required the acquisition of them. Also, if you used different types of network media, it was necessary to create a separate subnet for each type of medium.
Instead, the network bridge feature that is available in Windows XP, Windows Server 2003, Standard Edition and Windows Server 2003, Enterprise Edition connects LAN segments by simply clicking the menu command Bridge Connections. No configuration required and no need to purchase additional hardware such as routers or bridges. Network Bridge automates the settings required to route traffic between multiple network segments with a single type of media or mixed media.
layer 2 ( data link layer ) of the OSI model . This connects two network segments (or divides a network into segments) by the passage of data from one network to another, based on the physical address of destination of each packet.
A bridge connects two network segments as a single network using the same protocol for establishment of network.
operates through a table of MAC addresses detected in each segment is connected. When it detects that a node one of the segments is trying to transmit data to another node, the bridge copies the frame for another subnet. To use the machine learning mechanism, the bridges do not require manual configuration.
The main difference between a bridge and a hub is that the second pass any plot to any destination for all other connected nodes, whereas the former only passes the frames belonging to each segment. This feature improves performance networks to reduce unnecessary traffic.
To make the bridging or networking of more than 2 networks are used switch.
There are two types of bridge:
Local: used to directly link two networks physically close. Remote
or wide area, are connected in pairs, linking two or more local networks, forming a wide area network through telephone lines
A bridge is a hardware device used to connect two networks that work with the same protocol . Unlike a repeater , which runs on the physical level , the bridge runs in logical level (on layer 2 of the OSI model). This means you can filter frames to allow only the passage of those whose destination addresses correspond to a computer located across the bridge.
The bridge, thus, is used to segment a network, which retains the packets destined to the local area network and transmits those destined for other networks. This reduces the traffic (and especially the collisions) in each of the networks and increases the level of privacy because the information to a network can not escucharse en el otro extremo.
Sin embargo, el filtrado que lleva a cabo el puente puede provocar una leve demora al ir de una red a otra, razón por la cual los puentes deben ubicarse con buen criterio dentro de una red.
La función normal de un puente es enviar paquetes entre dos redes del mismo tipo:
Concepto: Un puente cuenta con dos conexiones a dos redes distintas. Cuando el puente recibe una trama en una de sus interfaces, analiza la dirección MAC del emisor y del destinatario. If a bridge does not recognize the sender, the address stored in a table to "remember" which side of the network is the issuer. Thus, the bridge can see if the sender and recipient are the same side or opposite sides of the bridge. If you are on the same side, the bridge ignores the message, if they are on opposite sides, the bridge sends the frame to the other network.
How a bridge
A bridge works at the data link layer of the OSI model , ie it works with the physical addresses of the computers. In fact, bridge is connected to several local area networks, called segments. The bridge creates a table of correspondence between the addresses of the computers and the segments to which they belong, and "listens" to data flowing through the segments.
At the time of data transmission, the bridge controls on the table set the segment to which computers belong senders and recipients (using your physical address, called the MAC address, not your IP address ) . If they belong to the same segment, the bridge does nothing, otherwise, it switches the data to the destination computer segment.
Why use a bridge?
A bridge is used to segment a network, ie (in the case presented above) for communication between the three top teams do not block grid lines passing through the three teams bottom. The information is transmitted when a team from one side of the bridge sends data to a computer on the opposite side. In addition, these bridges can be connected to a modem so they can operate with a remote local area network.
Below the diagram of a bridge:
A bridge is a device interconnect computer networks that operates at Layer 2 ( data link layer ) of the OSI model . This connects two network segments (or divides a network into segments) by the passage of data from one network to another, based on the physical address of destination of each packet.
A bridge connects two network segments as a single network using the same protocol for establishment of network.
operates through a table of MAC addresses detected in each segment that is connected. When it detects that a node one of the segments is trying to transmit data to another node, the bridge copies the frame for another subnet. To use the machine learning mechanism, the bridges do not require manual configuration.
The main difference between a bridge and a hub is that the second pass any plot to any destination for all other connected nodes, whereas the former only passes the frames belonging to each segment. This feature improves network performance by reducing unnecessary traffic.
To make the bridging or networking of more than 2 networks are used switch.
There are two types of bridge:
Local: used to directly link two networks physically close. Remote
or wide area, are connected in pairs, linking two or more local networks, forming a wide area network through telephone lines.
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