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For example, the sample diagram does not indicate the physical type of connection between the PCs and the switch, but since a modern LAN is depicted, Ethernet may be assumed. If the same style of line was used in a WAN (wide area network) diagram, however, it may indicate a different type of connection.
A network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer (layer 2) of the OSI model. Some switches can also forward data at the network layer (layer 3) by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches. [2 ...
The main advantage of layer-3 switches is the potential for lower network latency as a packet can be routed without making extra network hops to a router. For example, connecting two distinct segments (e.g. VLANs) with a router to a standard layer-2 switch requires passing the frame to the switch (first L2 hop), then to the router (second L2 ...
Firewall dual-homing provides the first-line defense and protection technology for keeping untrusted bodies from compromising information security by violating trusted network space. A dual-homed host (or dual-homed gateway [ 2 ] ) is a system fitted with two network interfaces (NICs) that sits between an untrusted network (like the Internet ...
Although, with a parallel backbone, it allows for duplicate connections when there is more than one router or switch. Each switch and router are connected by two cables. By having more than one cable connecting each device, it ensures network connectivity to any area of the enterprise-wide network. [12]
Network topology is the arrangement of the elements (links, nodes, etc.) of a communication network. [1] [2] Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, [3] industrial fieldbusses and computer networks.
A home–class router with wireless capabilities; many home routers like this example combine router, wireless access point, switch and modem into one single unit (see also residential gateway) A router [ a ] is a computer and networking device that forwards data packets between computer networks , including internetworks such as the global ...
The switch is used to allow devices on the home network to talk to one another via Ethernet; while the needs of most home networks are satisfied with the built-in wireless and/or switching capabilities of their router, some situations require the addition of a separate switch with advanced capabilities. For example the fact a typical home ...
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