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The main task of switching is to ensure the connectivity of the nodes connectivity within one a single network (see. InfiLINK 2x2 and InfiMAN 2x2: Switching). To organize In order to establish the communication between different networks, different a new class of devices (called routers) must be used (see Figure 1). This article describes the applications application areas and the configuration of the Infinet devices when used as routers.
Terminology
- Switching - the process of connecting subscribers through intermediate devices. In most modern networks, frame switching is done performed using the Ethernet header, based on the Ethernet header ( destination MAC address and on the vlan ID). In the example in (Figure 1a), the data exchange between PC-1 and PC-2 is performed based on the MAC addresses. In this article, the terms switching and L2 data transmission technology are identical.
- Switch - the device that performs switching.
- Routing - the process of determining the best data transmission path between nodes in belonging to different networks, which is the best according to some a certain criteria. Most modern networks route packets based on the IP header (destination IP address). In the example in (Figure 1b) the data exchange between PC-1 and PC-2 is performed based on the IP addresses. n In this article, the terms routing and L3 data transmission technology are identical.
- Router - the device that performs routing.
- Local network - the network part that is in the responsibility area of the organization. The organization's employees are responsible for assigning IP addresses to the devices on in this network , and an address conflict is very unlikely.
- Global network - network having global scale network. Usually, the Internet is understood as a global network. Since many local networks are connected to the global network, the allocation of the IP addresses allocation is performed centrally, by special organizations.
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Let's look at the difference differences in the processing of the service headers for data transmission by switching and routing using an example when performing switching compared to routing. The example in (Figure 1) will be used for this purpose.
In the scenario when PC-1 sends data to PC-2 (Figure 1a), PC-1 fills in the service fields following way:
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