Expect minimum percentage: 94.8% 1. Refer to the exhibit. All routers are running the same routing protocol. Based on the exhibit and its displayed commands, which statement is true? ans: The link to the ISP is not advertised by the routing protocol process. 2. Refer to the exhibit. While trying to diagnose a routing problem in the network, the network administrator runs the debug ip rip command. What can be determined from the output of this command? ans: The router will be unable to ping 192.168.1.2. 3. Refer to the exhibit. Two routers are unable to establish an adjacency. What is the possible cause for this? ans: The hello and dead intervals are different on the two routers. 4. Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor … [Read more...]
ERouting v4.0 Final Pattern 2
Expect minimum percentage: 90.2% 1. Which of the following are primary functions of a router? (Choose two.) ans: packet switching path selection 2. Refer to the exhibit. Pings are failing between HostA and HostB. The network administrator discovers that Router1 does not have a route to the 172.16.0.0 network. Assuming Router2 is configured correctly, which two static routes could be configured on Router1 to enable Host A to reach network 172.16.0.0? (Choose two.) ans: ip route 172.16.0.0 255.255.0.0 S0/0 ip route 172.16.0.0 255.255.0.0 192.168.0.2 3. Refer to exhibit. Given the topology shown in the exhibit, what three commands are needed to configure EIGRP on the Paris router? (Choose three.) ans: Paris(config)# router eigrp 100 Paris(config-router)# network 192.168.7.0 Paris(config-router)# network 192.168.8.0 4. Refer to the exhibit. A packet enters Router1 with a destination IP of 172.16.28.121. Which routing table entry will be used to forward … [Read more...]
Erouting v4.0 Chapter 10
Expect minimum percentage: 97.4% 1. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks? ans: Dijkstra 2. What feature do modern link-state protocols provide to minimize processing and memory requirements? ans: splitting routing topologies into smaller areas 3. What is the final step in the link state routing process? ans: SPF computes best path to each destination network 4. Refer to the exhibit. Which statement correctly describes the path traffic would take from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing protocol was in use? ans: BOS -> ORL -> JAX -> ATL because this path is the lowest cost 5. Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL? ans: cost of the link 6. Refer to the exhibit. When Router D is configured to use a link-state routing protocol and is added to the network, what … [Read more...]
Erouting v4.0 Chapter 9
Expect minimum percentage: 100% 1. On a router running EIGRP, what database would maintain a list of feasible successors? ans: topology table 2. Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause? ans: they have different autonomous-system numbers 3. Refer to the exhibit. Which command will advertise the 192.168.1.64/30 network but not the 192.168.1.32 network on router A? ans: network 192.168.1.64 0.0.0.3 4. What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choose two.) ans: query neighbors for a new route search topology table for a feasible successor 5. Refer to the exhibit. What is indicated by the P at the beginning of the topology entry? ans: the route is in a stable state 6. In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose … [Read more...]
Erouting v4.0 Chapter 8
Expect minimum percentage: 100% 1. Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1? ans: ip classless 2. Refer to the exhibit. How many routes in this output qualify for use as ultimate routes? ans: 7 3. The following entry is displayed in the routing table: R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1 What type of route is this? ans: a level 1 ultimate network route 4. Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched first and why? ans: 172.16.0.0/25 because it is the first … [Read more...]
Erouting v4.0 Chapter 7
Expect minimum percentage: 100% 1. Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the 192.168.1.32/27 network? ans: Rip version 2 will auto summarize routes by default. 2. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.) ans: RIP version 2 supports VLSM. RIP version 2 supports routing update authentication. 3. Refer to the exhibit. RIPv1 is configured as the routing protocol for the network that is shown. The following commands are used on each router: router rip network 10.0.0.0 network 172.16.0.0 When this configuration is complete, users on the LAN of each router are unable to access the remote LANs. Why? ans: RIPv1 is unable to route to discontiguous subnets of a major network. 4. Refer to the exhibit. What effect will the commands that are shown have on RIP updates for Router1? ans: Only version 2 updates are sent to 224.0.0.9. 5. Refer to the exhibit. … [Read more...]
Erouting v4.0 Chapter 6
Expect minimum percentage: 100% 1. Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses? ans: 255.255.255.252 2. An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses? ans: 192.1.1.224/28 3. Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets? ans: 192.168.0.0/21 4. What is a supernet? ans: a summarization of serveral IP classful networks into one IP address range 5. In the network shown in the graphic, three bits were … [Read more...]
Erouting v4.0 Chapter 5
Expect minimum percentage: 94.9% 1. Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still valid in the routing table of Router1. How much longer will it take for Router1 to mark the route invalid by setting the metric to 16? ans: 155 seconds 2. Refer to the exhibit. Router1 and Router2 are running the RIPv1 protocol. The network administrator configures the command network 10.1.0.0 on Router1. What network will Router1 advertise to Router2? ans: 10.0.0.0/8 3. Refer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to configure the gateway of last resort? ans: ip route 0.0.0.0 0.0.0.0 S0/0/1 4. Refer to the exhibit. All routers that are shown are running the RIP routing protocol. All unknown IP traffic must be forwarded to the ISP. What router or set of routers are recommended to have both a default route and the default-information originate command issued to … [Read more...]
Erouting v4.0 Chapter 4
Expect minimum percentage: 100% 1. What does the RIP holddown timer do? ans: instructs routers to ignore updates, for a specified time or event, about possible inaccessible routes 2. What metric does the RIP routing protocol consider to be infinity? ans: 16 3. What is a routing loop? ans: a condition where a packet is constantly transmitted within a series of routers without ever reaching its intended destination 4. Which two statements are true regarding the function of the RIPv1 routing updates? (Choose two). ans: updates are broadcast at regular intervals broadcasts are sent to 255.255.255.255 5. Which of the following can exist in a distance vector network that has not converged? (Choose three.) ans: routing loops inconsistent traffic forwarding inconsistent routing table entries 6. Refer to the exhibit. What path will packets from the 192.168.1.0/24 network travel to reach the 10.0.0.0/8 network if RIP is the active routing … [Read more...]
Erouting v4.0 Chapter 2
Expect minimum percentage: 100% 1. Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined for this link? ans: The rate configured on the DCE determines the clock rate 2. Which piece of information is available from examining the output of the command show ip interface brief? ans: Interface IP address 3. Refer to the exhibit. Which set of commands will configure static routes that will allow the WinterPark and the Altamonte routers to deliver packets from each LAN and direct all other traffic to the Internet? ans: WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1 Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2 Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1 4. The output of the Router# show interfaces serial 0/1 command displays the following: Serial0/1 is up, line protocol is down. What is the most likely cause for the line protocol being down? ans: No clock rate has been … [Read more...]
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