ccna 200 301 bookstore chains that have closed

ccna 200 301 bookstore chains that have closed.The metric reaches the distance to the far end of the network. Different routing protocols will use different methods to calculate this distance. Routing protocols will be covered in Chapter 10, but for now, just know this: some routing protocols (actually RIP) use hop counts for calculations (the number of hops a packet needs to traverse in order to reach the far-end network).number of routers), other routing protocols use bandwidth, line delay, or even tickcount[Ll] (1/18th of a second) for their calculations.It was mentioned earlier that routers segregate broadcast domains, which means that by default, routers do not forward broadcasts. Do you remember what the benefit of this design is? Routers also segregate conflict domains, and you can also use Layer 2 (data link layer) switches to segregate conflict domains. Each interface on the router represents a separate network, so a unique network identification number must be assigned to each interface, and all hosts in the network that connect to this interface on the router must also use the same network number. Figure 2.14 illustrates how a router works in an interconnected network.FastEthemetO/OInternet FastEthernetO/1Each router interface is a broadcast domain. Routers segregate broadcast domains by default and provide WAN services. Figure 2.14 Routers in an Interconnected NetworkYou need to remember these points about routers. mu By default, routers do not forward any broadcast or multicast packets. MU routers use logical addresses in network layer addresses to determine the next-hop router to forward packets to. A starter router can use access lists (access lists are created by the administrator) to provide security control by allowingcertain types of packets to enter or leave an interface. Suffixes A router can provide Layer 2 bridging capabilities if desired, and can also provide routing capabilities through the same interfaces at the same time. Given that a Layer 3 device (that is, a router in this example) provides connectivity between VLANs (virtual local area networks)... Routers can provide QoS (Quality of Service) for specific types of network traffic.2.3.6 Data Link LayerThe data link layer is responsible for providing physical transport for data and for handling error notification, network topology, and implementing flow control. This means that the data link layer uses hardware addresses to ensure that messages are sent to the correct devices in the same LAN, and in the process, it is also responsible for converting messages from the network layer into a format of bits for transmission by the physical layer.