A 5 D FIGURE 3.54 Network for Exercise 47. 2 2 B 2 C 1 3 E 3 F 48. For the network given in Figure 3.53, show how the link-state algorithm builds the routing table for node D.
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- computer networks question : In the figure above Q3, if the routers agree to use the OSPF protocol (a link state method) to build their routing tables. Routers start flooding LSAs which to help each other in building a complete graph structure for the network. At one time during the flooding, router E has thefollowing information in its LSDB: If router E got the following LSA from router F, answer the following: B - Draw the graph of the network as seen by router E at this stage.What is the shortest path from node A to node D, where shortest path is defined as the path with the smallest sum of the delays on each individual link? Explain exactly how you went about finding that path.Shown below is a network with cycles in it. The bridges run the distributed spanning tree algorithm. For all of the labeled ports, indicate the final state, assuming that B1 is the root bridge. Recall that RP = "Root Port," DP = "Designated Port," and BP = "Blocked Port." Carefully note the port numbers for each bridge when entering your answers! 1 B3 B8 2 2 E В K B1 T B4 B6 2 2 C 1 B5 1 3, B7 B2 2 W Bridge Port 1 Port 2 Port 3 B2 [ Select ] [ Select ] B3 [ Select ] [ Select ]
- Provided graph G=(N,E), in which N denotes the collection of routers and E, the collection of links. Calculate the least costly route from node U to all other nodes using Dijkstra's link-state routing mechanism, and then display the final lowest graph from U?Computer Networks In the attached graph, router 1A will learn about prefix X via: iBGP eBGP OSPF None of the above (1A does not need to know about X, it simply forwards all traffic towards AS2)Our goal in this problem is to determine the “lowest latency routes” starting from your location. The internet in this problem is modeled by a graph, with vertices corresponding to other clients or servers, and edges representing the links between clients/servers. Each edge is not undirected, i.e., the links are unidirectional. At the same time, each link adds a constant latency if you use the link in your routes. Note that if you need to communicate with your own client, then the latency is 0. We represent your location as the vertex 0. Your goal is to determine the total latency it would take if you used the shortest path route from your location to any other client/server in the network. Input Format Each test case starts with a line containing three integers V, E, and Q, denoting the number of vertices, edges, and queries, respectively. Note that vertices are identified with integers from 0 to V-1. E lines follow, each containing three integers s_i, d_i, l_i, denoting the…
- Exercise 8.17. In a version of the network reliability problem, we want to know how many different ways there are to send a message from its source to its destination. Hereto, we represent the network by a directed graph G = (V, A), the source by s and the destination by t. In this exercise, we consider two simplified versions of this problem.In the figure above Q3, if the routers agree to use the OSPF protocol (a link state method) to build their routing tables. Routers start flooding LSAs which to help each other in building a complete graph structure for the network. At one time during the flooding, router E has thefollowing information in its LSDB: If router E got the following LSA from router F, answer the following: A - How would the LSDB of router E looks like after completing the OSPF process?3. Consider the following network with nodes A through F. Identify the shortest path to E by using a Bellman Ford algorithm. From the answer you have obtained, examine the problems that would arise if all routing in the figure below using Link-State and Dijikstra's Algorithm. Does distance-vector routing suffers from the same problems?. 13 D 15 B A -25- F E C 34 -2-
- Consider Pastry network that uses DHT, in which m=4 and b=2. Currently the network has 7 nodes, N01, N03, N11, N12, N20, N23, and N33, and 4 keys, K10, K13, K21, and K30. Although it is unrealistic, assume that the proximity metric between each two nodes is based on numerical closeness. The following path is the node N12’s routing response to the query asking for the key K30: A. N12 ► N33. B. N12 ► N33 ► N23. C. N12 ► N03 ► N33. D. None of the above.Find the shortest ancestral route between v and w given a DAG and two nodes, v and w. A shared progenitor x, the shortest route from v to x, and the shortest route from w to x make up an ancestral path between v and w. The ancestral route whose overall length is minimised is the smallest ancestral path. Find a DAG where a common progenitor x is reached by the shortest ancestral route that does not lead to an LCA. Run BFS twice, from both v and w, as a hint.For nodes 0000 and 1111, there exists four node-disjoint paths of length 4 (which happens to be the hamming distance between them). These paths are listed as travel from source 0000 through dimension 0-1-2-3 or 1-2-3-0 or 2-3-0-1 or 3-0-1-2 to the destination 1111. Question 1: how many node-disjoint paths between nodes 0000 and 1010 and what are their length? Question 2: for any two arbitrary nodes with the hamming distance r, how many node-disjoint paths among them with the distance r and what are they?