CISCO PROTOCOLES CONCEPTS DE ROUTAGE ET SCURIT PDF

CISCO PROTOCOLES CONCEPTS DE ROUTAGE ET SCURIT PDF

Uninformed management stations lose access to the router through Before you enable the Management Plane Protection feature, you should understand the following concepts: Examples of protocols processed in the management plane are . Cisco IOS Security Configuration Guide, Release Chapters in a configuration guide describe protocols, configuration tasks, and . Within Cisco IOS software documentation, the term router is generally used to .. concept of a trusted third party that performs secure verification of users and. Last modified by Deonte R. Carroll on Sep 19, AM. Visibility: Open to anyone. nt Routing Protocols and

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Some routing algorithms operate in a flat space, while others use routing hierarchies. One of the methods that can be used to prevent these types of attack is the use of routing protocol authentication. Routing algorithms can be programmed to adapt to comcepts in network bandwidth, router queue size, and network delay, among other variables.

Put simply, routing protocols are used by intermediate systems conceptw build tables used in determining path selection of routed protocols. All other things being equal, a Mbps Ethernet link would be preferable to a kbps leased line.

Naturally, routing protocols must define their metric calculation algorithms strictly. Path length is the most common routing metric. At this point, they travel from the last backbone router through one or more nonbackbone roktage to the final destination. Dynamic routing algorithms can be supplemented with static routes where appropriate.

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Routing algorithms fill routing tables with a variety of information. This is usually referred to as source routing. In these algorithms, routers determine the path through the internetwork based on their own calculations. If not, the next hop is usually another router, which executes the same switching decision process.

The primary difference between the two is that bridging occurs at Layer 2 the link layer of the OSI reference model, whereas routing occurs at Layer 3 the network layer.

Most network communication occurs within small company groups domains. Link information also can be used to build a complete picture of network topology to enable routers to determine optimal routes to network destinations.

Routing Protocol Authentication Concepts and Configuration

Configure the use of RIP authentication. In addition, routing algorithms must converge rapidly. Topics summarized here include routing protocol components and algorithms. Routing is often contrasted with bridging, which might seem to accomplish precisely the same thing to the casual observer.

Routing Basics – DocWiki

Configure the use of a specific key chain key for authentication. Load can be calculated in a variety of ways, including CPU utilization and packets processed per second.

Link-state protocols are generally more scalable than distance vector protocols. In very large networks, additional hierarchical levels may exist, with routers at the highest hierarchical level forming the routing backbone. Some network links might go down more often than others.

Because static routing systems cannot react to network changes, they generally are considered unsuitable for today’s large, constantly changing networks. Routing involves two basic activities: Personal tools Log in.

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Routing algorithms must be robust, which means that they should perform correctly in the face of unusual or unforeseen circumstances, such as hardware failures, high load conditions, and incorrect implementations. It stands to reason, therefore, that an optimal intradomain-routing algorithm would not necessarily be an optimal interdomain-routing algorithm. To aid the process of path determination, routing algorithms initialize and maintain routing tables, which contain route information.

If the router knows how to forward the packet, however, it changes the destination physical address to that of the next hop and transmits the packet. Unlike single-path algorithms, these multipath algorithms permit traffic multiplexing over multiple lines. The configuration required to setup RIP authentication is shown in Table 6. Other algorithms assume that hosts know nothing about routes.

Routing tables also can contain other information, such as data about the desirability of a path. A – Static, dynamic, flat, hierarchical, host-intelligent, router-intelligent, intradomain, interdomain, link-state, and distance vector. In this case, path length is the sum of the costs associated with each link traversed.

How do routing algorithms determine that one route is preferable to others? In essence, link-state algorithms send small updates everywhere, while distance vector algorithms send larger updates only to neighboring routers.