cisco ccna quizlet

cisco ccna quizlet.With the concept of virtual LANs (VLANs), the failures caused by an oversized single LAN can be avoided. Multiple VLANs can be divided on the switch, with each port assigned to a different VLANOFigure 1.28 shows a switch with four hosts directly connected. Hosts A and E belong to VLAN 101, while hosts B and D belong to VLAN 102o That switch will treat hosts belonging to the same VLAN as belonging to the same broadcast domain. That switch does not forward packets from one VLAN to another VLAN from Layer 2o Therefore, VLANs can be isolated at Layer 2Networks.32 Chapter 1 Network Protocols and Network Device BasicsSeveral obvious benefits of enabling VLANs are shown below. Can significantly reduce the number of broadcast frames received by hosts and the associated overhead. Enables network isolation at Layer 2. Reduces the complexity of managing protocols and the load of managing protocol traffic.Can isolate fault and troubleshooting areas because faults that occur in one VLAN are not propagated to the rest of the network.How does the switch forward frames within a VLAN? The previous discussion of a switch forwarding frames within a single LAN also applies to a switch forwarding frames within each VLAN. The switch knows which of its ports is assigned to which VLAN, and forwards frames based on this correspondence. In cases involving multiple switches, the VLAN concept is still in effect. Figure 1.29 shows the VLAN concept involving two switches.MAC address of SW1 MAC address of SW2MAC Address Port Vian0200.1111.1111 f0/10 101