ccna 200 301 syllabus plural oxford

ccna 200 301 syllabus plural oxford.then refers to the routing table to determine which interface the packet should be sent out from and encapsulates it with the outgoing interface's data link layer address, then queues it up forIt is then queued for forwarding and finally reaches the destination host in the destination network using direct addressing.Direct addressing occurs at Layer 2 and is based on physical addresses. Indirect addressing is done at Layer 3 and is based on IP addresses. Routing technology means finding a transmission path for IP packets through the communication subnet, using indirect addressing to deliver the packets station by station up to the final device. It is relatively more complex because of the different routing protocols and routing algorithms involved. In order to determine the best path, a routing protocol is first selected and different routing protocols use different metric values. The so-called metric value is an evaluation criterion to determine the goodness of the transmission path. Metrics include Hopcount, Bandwidth, Delay, Reliability, Load, Ticks135and Cost, etc. The routing algorithm must initiate and maintain a routing table containing routing information, where the routing information varies depending on the routing algorithm used. The routing algorithm fills the routing table with the different information collected, and based on the routing table the destination network can be told to the router in relation to the next-hop (next-hop). Routing information is exchanged between routers for routing updates, and the routing table is maintained so that it correctly reflects the topological changes in the network, and the routers decide the best path based on the metric values, which is the Routing protocol, such as RIP (Route Information Protocol), E1GRP (Enhanced Interior GatewayRouting Protocol), and E1GRP. Enhanced Interior GatewayRouting Protocol, OSPF (Open Shortest-Path First), and BGP (Border GatewayProtocol), etc.Forwarding is the transmission of packets of information along the best addressed path. The router first looks in the routing table to determine whether it knows how to send the packet to the next site (router or host), if the router does not know how to send the packet, it usually discards the packet; otherwise, it sends the packet to the next site according to the corresponding table entry in the routing table, and if the destination network is directly connected to the router, the router sends the packet directly to the corresponding port.5.1.3 Routing Protocols**Before talking about routing protocols, it is important to clarify the concepts of routed protocols and routing protocols, which are often out and out and can be easily confused.Routingprotocol is translated as routing protocol. Routers use dynamic routing protocols to dynamically discover all networks on the Internet and to build dynamic routing tables, and the routing protocols covered in the CCNA are RIP, EIGRP, OSPF, etc.Routed protocols are translated as being routed protocols and are sometimes called routable protocols. Routed protocols follow the routing tables constructed by routing protocols to forward user data over the Internet. Routed protocols include IP, IPX, AppleTalk, etc. For a protocol to be routable, it must provide each device with the ability to do so, supporting network numbers and host numbers. IPX, for example, requires only network numbers to be assigned because they use the host's MAC address as the host number; IP, for example, includes both network and host numbers. NetBIOS, on the other hand, includes only the computer name and is ...a protocol that cannot be routed. Routing by a router is based on the network address of the target host, not on the IP address of the target host.