In function, Switch LAN multiport similar to Bridge. Like the bridge, connecting LAN Switch LAN Segments, reducing
traffic, and use also MAC Address to determine where the frame will be transmitted …! Only difference from the performance of the LAN switch faster than the bridge, and also has a function that can not be done by the Bridge as Virtual LANs, etc. …
LAN Switch has and supports some features include:
* Dedicated Communication between devices, each user get a dedicated and full bandwidth. For example 100 mbps port connected to a PC that has 100Mbps, it will have 100Mbps bandwidth. The impact of this will reduce the likelihood of collision.
* It Communcation happen simultaneously, this occurs because some frames are entered directly in the forward and switches at the joint.
* Full Duplex Communication and the media allocation rate, related to 100Mbps full duplex for example, the data can be transmitted for 100Mbps, and the data can direceived also 100Mbps. While the media allocation rate, we can set this port is for 10 Mbps or 100Mbps port it etc..
Technology is used to channel switch frame is:
1. Store and forward, frame error checking nyampe done and if the frame is in error then immediately drop. If no CRC error also didrop, if the frame is smaller than 64 bytes are also didrop, greater than 1518 bytes are also didrop. The next switch to forward frames which no errornya to destination MAC Address.
2. Cut-Through, this method reduces the latency for the incoming frame awaited destinationnya, then forward the frame directly, without checking error checking.
In the function, a switch can be categorized in:
* Layer 2 (Data Link Layers) Switch, which switches the way it works like Multiport Bridge, but could do other features such as full duplex etc.. Switching and filtering only happens at the OSI layer 2.
* Multi Layers Switch, on this switch and the switching process occurs in filteringnya OSI Layer 2 and 3. In this switch can perform switching between LAN Segment and do routing between different networks.
