Link-State Routing Protocol Characteristics

Link-State Routing Protocol Characteristics

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Which characteristics are representative of a link-state routing protocol? (Choose three.)



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A. B. C. D. E.


Link-state routing protocols, such as OSPF and IS-IS, have several key characteristics that distinguish them from other routing protocols. Below are the three characteristics that are representative of link-state routing protocols:

  1. Provides a Common View of Entire Topology: One of the most significant characteristics of link-state routing protocols is that they provide a common view of the entire network topology. In other words, every router in the network has a copy of the same detailed map of the network, showing every link and node. This common view allows each router to determine the shortest path to any destination network, which is essential for efficient and accurate routing.

  2. Calculates Shortest Path: Link-state routing protocols use a sophisticated algorithm to calculate the shortest path to a destination network based on the information in the common view of the network topology. This algorithm takes into account various factors such as bandwidth, delay, and cost to determine the optimal path to a destination network.

  3. Utilizes Event-Triggered Updates: Another significant characteristic of link-state routing protocols is that they use event-triggered updates. This means that when a change occurs in the network, such as a link going down or a new link being added, the affected router will immediately update its link-state database and send updates to its neighbors. This process ensures that every router in the network is aware of the change and can recalculate the shortest path to all destinations as needed.

In contrast, other routing protocols such as distance-vector protocols (e.g., RIP) utilize periodic updates. These protocols send updates at a fixed interval, regardless of whether any changes have occurred in the network or not, which can lead to inefficient use of network bandwidth.

Therefore, options A, C, and D are the correct choices as they are the representative characteristics of a link-state routing protocol. Option B is incorrect as link-state routing protocols