ccna 200-301 network simulator tools today porter

ccna 200-301 network simulator tools today porter.Routers have two typical functions, namely the data channel function and the control function. The data channel function consists of forwarding decisions,23 Abackplane forwarding, and output link scheduling, which are typically performed by specific hardware; control functions are typically implemented in software and include information exchange with adjacent routers, system configuration, and system management.Routers have the function of determining network addresses and selecting paths, which can establish flexible connections in a multi-network interconnection environment, and can connect various subnets with completely different data grouping and media access methods. A router is an interconnection device at the network layer that has the effect of isolating broadcasts, and each of its ports is a separate broadcast domain and a separate conflict domain.Among the many ways in which a LAN can access a WAN, accessing the Internet through a router is the most common way. The biggest advantage of using routers to interconnect networks is that each interconnected subnet remains independent, and each subnet can use different topologies, transmission media and network protocols, with a clear hierarchy of network structures. By connecting to the Internet through routers, the company's internal network can be completely shielded. Some routers also have integrated intrusion prevention and firewall functions inside, so the use of routers can be used to defend against attacks and protect the security of the internal network.A comparison of routers and switches is shown in Table 231.Table 2-3-1 Comparison of Routers and SwitchesFeatures Router SwitchOSI forwarding speed Slow FastOSI layer The first [layer The second layer