By Clare Gough, Kevin Downes
This e-book is for an examination, ACRC, that's now not provided by way of Cisco. BSCN took it really is position.
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Extra info for Acrc Exam Certification Guide
3, complex access lists prevented the caching of routing decisions, for example, fast, autonomous, and silicon switching. These functions are now supported, particularly if Netflow features are turned on. In this context, switching refers to a Cisco solution that was implemented in the earliest of Cisco’s products and that has been consistently enhanced. To improve the capability of the router to forward traffic—after the routing process has made a routing decision and sent the packet to the appropriate outbound interface—the router holds a copy of the outbound frame in memory along with a pointer to the appropriate outbound interface.
Write an output SAP filter, one that limits service updates, to be placed on the outbound interface of the router. • Write a static SAP entry stating the IPX/IP gateway on every local router and prevent all SAP updates. 1223 8104 4 3 The following are some suggestions of first-line security that could be implemented: • Ensure the routers are held in a physically secure environment. • Write a standard access list to be applied on the vty line interfaces. • Change the passwords on the routers. • Turn on logging and accounting at the router.
Each SAP packet holds seven service advertisements. The packet is up to 480 bytes in length, without the header. Each server and router will exchange its SAP table every 60 seconds by default. Imagine an enterprise network with 700 services available worldwide—a moderately sized network. Note that the number 700 identifies the number of services advertised; it does not reflect 700 servers. The servers may number less than 200. However, 700 services is a convenient number because it renders 100 packets—or 48,000 bytes (B), or 48 kilobytes (KB)—of traffic generated by every server or router every 60 seconds.