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What is the gateway? What is the switch? Switch work? What are hubs and centers? What is a core router?

Gateway: Gateway is a medium, which acts as a bridge or bridge between two networks so that many computers can exchange data together. That is, the device used to connect different types of networks is the gateway. It translates the protocol. It works on layer 7 of the OSI model.

Switch: Network switch and network hub are the main pillars of computer networking. In networking, a switch is a device that performs filtering and packet forwarding when exchanging data packets between different parts of a local area network. The switch and SI layer operate at the data link layer. But sometimes it also works at network layer. A local area network (LAN) that uses switches to communicate between its different parts is called a switched LAN. Switches are the network layer that additionally processes data (Layer 3) and are often referred to above as Layer 3 switches. The first Ethernet switch was introduced in 1990.

Functions of switches: Network switches are switches connected to most modern Ethernet local area networks. Small office  applications use single switches, or devices used as gateways to realize a broadband service such as DSL or cable Internet. Interfaces to this technology may also include a telephone interface for user devices VOIP. An Ethernet switch must create a separate domain for each port.


Role of Switches in Networks: Switches can handle one or more layers of the OSI model. A device operates in more than one of these layers simultaneously as a multilayer switch. The switch can connect different types of networks, including Ethernet, Tantra Channel, ATM, ITU-T G hn and 802 11, for commercial use, intranet or modular interface. Some firewalls are network detection and performance analysis modules that lead to switch ports.

Layer-specific operation: At any layer, a modern switch can implement Rights over Ethernet (POE), which avoids the need to maintain a separate rights-of-way device, such as a VOIP phone or wireless data retrieval.

Center: The center is the path to form a single network. It has multiple ports for RJ-45 cables. It makes no difference to all network equipment. Bandwidth is divided by the number of connected computers.


Hub: A hub is a repeater with multiple ports. It works with electrical signals. Hubs don't have to worry about network addresses or network adapter MAC addresses. It also works at the physical layer of the OSI model.

Core router: This is a router that is limited to the internal LAN network as opposed to the outside.

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