icnd_ppt_third01_路由介紹(文件)
【正文】 rights reserved. ICND —513 ? Routing protocols are used between routers to determine paths and maintain routing tables. ? Once the path is determined, a router can route a routed protocol. What Is a Routing Protocol? 169。 2022, Cisco Systems, Inc. All rights reserved. ICND —517 Classful Routing Overview ? Classful routing protocols do not include the sub mask with the route advertisement. ? Within the same work, consistency of the sub masks is assumed. ? Summary routes are exchanged between foreign works. ? Examples of classful routing protocols: –RIP Version 1 (RIPv1) –IGRP 169。 2022, Cisco Systems, Inc. All rights reserved. ICND —521 VLANtoVLAN Overview ? Network layer devices bine multiple broadcast domains. 169。 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
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