NET 365 Networking Question

  1. (5 points) EIGRP routes in Cisco routing tables are marked with Code = “D” on the left Why is “D” used rather than “E”? What does the “D” stand for?
  2. (5 points) Router R1 and router R2 are directly connected by a point-to-point serial link connecting their S0/0 interfaces. The EIGRP configuration on R1 starts with router eigrp 100 and the EIGRP configuration on R2 starts with router eigrp 111. Both R1 and R2 configurations include an EIGRP network statement that activates EIGRP on the S0/0 Will R1 and R2 form an EIGRP adjacency and exchange EIGRP update messages or not? Explain your answer.
  3. Router X is running EIGRP and is connected to Router A out port S0/2/0, Router B out port S0/2/1 and Router C out port S0/2/2. Through EIGRP update messages, router X learns about three possible routes to destination “EIGRP Metric” is the Total Distance (Feasible Distance) to the destination from Router


Destination Out Interface Neighbor Reported Distance EIGRP Metric S0/2/0 Router A 2651888 2651902 S0/2/1 Router B 2651794 2651839 S0/2/2 Router C 2651802 2651832
  1. (5 points) Which of these three routes will become the successor route and be placed into the routing table? Why? You should assume there is no unequal-cost load balancing, so only one route is placed into the routing table.
  2. (5 points) Given your answer to (a), which of the other 2 routes are feasible successor routes that will be stored in the Topology Table? In other words, which routes meet the feasibility condition? Show how you determine
  1. (5 points) I am configuring router R1 in an OSPF network and I have configured a static default route with the command “ip route 0.0.0”. I’ve already activated OSPF on my router interfaces and it has formed OSPF adjacencies with its neighbor routers. Now I want to advertise this static default route to all other OSPF routers. I could do this by executing redistribute static subnets. What is another command I can execute to advertise this static default route to all other OSPF routers?
  2. (5 points) Name 2 advantages to using EIGRP protocol compared with RIPv2 protocol to synchronize routing tables in a small network of routers.
  3. (5 points) Both OSPF and EIGRP do “equal cost load balancing”. Only EIGRP can do “unequal cost load balancing”. Explain what “equal cost load balancing” and “unequal cost load balancing” are and how they are
  4. (5 points) Router R1 is running EIGRP with auto-summary enabled. R1 has 3 routes in its routing table – they are, and Now R1 sends an EIGRP update out an interface whose IP is What is the one summarized route that R1 will send out for these 3 routes? Specify both the numerical network address and prefix length (/n) for this summarized route.


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100 Mbps Ethernet               R1

100 Mbps


R2         Ethernet






  1. (10 points) Consider the 3-router network above. Assume routers R1, R2 and R3 run EIGRP and are synchronized. Assume both R1 and R2 have set the Bandwidth on their serial link interfaces to 4 Mbps (bandwidth 4000). Assuming default EIGRP metric calculation and delay values, fill in the table below with the Minimum Bandwidth in Kbps, the Total Delay in microseconds, and EIGRP Metric (Total Distance) for the path from each router to destination subnet 66.30.0/24. Show the calculations you do to compute each EIGRP Metric value.


Router Destination Min. Bandwidth Total Delay EIGRP Metric


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