Which three pieces of information does a link-state routing protocol use initially as link-state information for locally connected links?
A link-state routing protocol uses the following three pieces of information as link-state information for locally connected links:
1. Link ID: This is a unique identifier assigned to each link in the network. It can be a numerical value or an alphanumeric string that distinguishes one link from another.
2. Link Cost/Metric: This represents the measure of the cost associated with traversing a link. It indicates the relative distance or quality of a link, such as bandwidth, delay, or reliability. The link-state protocol uses this information to compute the best path for routing.
3. Link State: This refers to the status or state of the link, which includes its availability and stability. It helps in determining if a link is up or down, whether it has failed or recovered, and whether it can be used for forwarding network traffic.
By collecting and exchanging this link-state information from all connected links, a link-state routing protocol constructs a complete and up-to-date network topology map. This map is then used to calculate the shortest path to destination networks using algorithms like Dijkstra’s algorithm.
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