Cisco SRW2048 48-Port Gigabit Switch
A network switch Cisco SRW2048 48-Port (also called switching hub, bridging hub, officially MAC bridge) is a computer networking device that connects devices together on a computer network by using packet switching to receive, process, and forward data to the destination device. Unlike less advanced network hubs, a network switch forwards data only to one or multiple devices that need to receive it, rather than broadcasting the same data out of each of its ports.
A network switch Cisco SRW2048 48-Port is a multiport network bridge that uses hardware addresses Cisco SRW2048 48-Port to process and forward data at the data link layer (layer 2) of the OSI model. Some switches can also process data at the network layer (layer 3) by additionally incorporating routing functionality that most commonly uses IP addresses to perform packet forwarding Cisco SRW2048 48-Port ; such switches are commonly known as layer-3 switches or multilayer switches.
Switches for Cisco SRW2048 48-Port Ethernet are the most common form and the first Ethernet switch was introduced by Kalpana in 1990.Switches also exist for other types of networks including Fibre Channel, Asynchronous Transfer Mode, and InfiniBand.
An Cisco SRW2048 48-Port Ethernet switch operates at the data link layer (layer 2) of the OSI model to create a separate collision domain for each switch port. Each device connected to a switch port can transfer data to any of the other ones at a time, and the transmissions will not interfere – with the limitation that, in half duplex mode, each switch port can only either receive from or transmit to its connected device at a certain time. In full duplex mode, each switch port can simultaneously transmit and receive, assuming the connected device also supports full duplex mode.
In the case of using Cisco SRW2048 48-Port a repeater hub, only a single transmission could take place at a time for all ports combined, so they would all share the bandwidth and run in half duplex. Necessary arbitration would also result in collisions, requiring re-transmissions.