icnd_ppt_third01_路由介紹-資料下載頁
2024-10-04 22:40本頁面
【正文】 2022, Cisco Systems, Inc. All rights reserved. ICND —525 Summary ? Routing is the process by which an item gets from one location to another. In working, a router is the device used to route traffic. ? Routers can forward packets over static routes or dynamic routes, based on the router configuration. ? Static routes can be important if the Cisco IOS software cannot build a route to a particular destination. Static routes are also useful for specifying a “gateway of last resort” to which all unroutable packets will be sent. ? A default route is a special type of static route used for situations when the route from a source to a destination is not known or when it is unfeasible for the routing table to store sufficient information about the route. 169。 2022, Cisco Systems, Inc. All rights reserved. ICND —526 Summary (Cont.) ? When the static routing configuration is plete, use the show ip route mand to verify the configuration. ? Dynamic routing relies on a routing protocol to disseminate knowledge. A routing protocol defines the set of rules used by a router when it municates with neighboring routers. ? The ip classless mand prevents a router from dropping a packet destined for an unknown sub. ? In a VLAN environment, frames are only switched between ports within the same broadcast domain so a Layer 3 device is required to enable interVLAN munication. Use ISL or to enable trunking on a router’s subinterface.
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