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CCNA Exploration Module 2 Chapter 9 EIGRP V 4.0 9.0.1 What features are found in EIGRP that are not found in other distance vector routing protocols? What type of protocol does EIGRP act like? What type of routing protocol is EIGRP? How is EIGRP similar to RIP v2? 9.1.1 What protocol was the precursor to EIGRP? What are the metrics composed of? What algorithm was used in IGRP? What two things does EIDRP not do? What table does EIGRP maintain that is separate from the routing table? What is included in the above table? Define loop-free. What is the result of using mechanisms to prevent routing loops and count to infinity problems in RIP and IGRP? What does EIGRP use to solve these problems? 9.1.2 What are the three type/length/value types in EIGRP? What is the protocol field value for EIGRP? What is the destination ip address? What is the MAC address for an EIGRP packet in a frame? 126.96.36.199 What are the four Opcodes for EIGRP? What are the two factors that EIGRP weights? Define delay. Define Bandwidth. What is the minimum length for a subnet mask in EIGRP? What is added to the subnet mask to reach the minimum length? 9.1.3 What are the three protocols does EIGRP support? What does EIGRP use to be able to support these protocols? 9.1.4 What protocol does EIGRP use to deliver and receive packets? Why does EIGRP have to use the above protocol? What are the two methods of delivery for RTP? What is the difference between the two methods of delivery? What are the two methods that RTP can send packets? 188.8.131.52 What are Hello packets used for? What are Update packets used for? When are Update packets sent? What are ACK packets used for? When are ACK packets used in EIGRP? What type of delivery method does an ACK packet use? What are QUERY and REPLY packets used for? 9.1.5 What must happen before EIGRP can exchange packets between routers? What is a Hello packet used for? How often are hello packets sent? How often are hellos packets sent on multipoint nonbroadcast multiaccess networks (NBMA)? What does an EIGERP router assume if it continues to receive hello packets from a neighbor? Define Holdtime. What is the holdtime by default? What happens if the holdtime expires? 9.1.6 Define partial. Define bounded. Why does EIGRP use partial bounded updates? 9.1.7 What is the Diffusing Update Algorithm (DUAL)? What problem is associated with DUAL recalculations? What does DUAL do to avoid recalculations? 9.1.8 Define Administrative Distance. What are the two default administrative distances for EIGRP? What is the administrative distance for a summary route? 9.1.9 Can EIGRP be configured to use authentication? 9.2.2 Define an Autonomous System. Who is responsible for assigning AS? What is the length of an AS number? Who needs an autonomous system number? 184.108.40.206 What does EIGRP use a process ID for? 9.2.3 What is the command to enable EIGRP as the routing protocol? Who chooses the autonomous system number used in the above command? What is the range available for autonomous system numbers? 9.2.4 What are the two functions that the network command provides? 220.127.116.11 What is used in EIGRP to limit the number of interfaces within a network that will be advertised? What is the inverse of a subnet called? 9.2.5 What must be established before any updates can be sent or received? Define the following entries in the EIGRP neighbor table: H column Address Interface Hold Uptime SRTT Queue Count Sequence Number If a ping is successful but the router still does not see the other router as a neighbor, what else should be checked? 9.2.6 What is the command to disable automatic route summarization? What variably subnetted mean? 18.104.22.168 What happens if a packet matches the parent route but none of the child routes? What are the two conditions that must be met for EIGRP to include a null0 summary route? What happens to the summary route when the no auto- summary command is issued? 9.3.1 What are the metrics that EIGRP can use? What two metrics are used by default? 22.214.171.124 What command can be issued to see the K values? 9.3.2 What command can be used to examine the actual values used for bandwidth, delay, reliability, and load in the computation of the routing metric? 126.96.36.199 Define delay. 188.8.131.52 Define reliability. Define load. 9.3.3 Does the bandwidth command change the actual speed of the interface? 9.3.4 What is the multiplier used to calculate EIGRP metric? 184.108.40.206 What bandwidth is used in calculating the EIGRP value between two interfaces? What is the reference value for bandwidth in EIGRP? How is delay calculated in EIGRP? How is the final metric that EIGRP uses calculated? 9.4.1 What is the algorithm EIGRP uses to determine the best path? What are the four main features that DUAL provides? What are the terms associated with DUAL? 9.4.2 Define successor. Define feasible distance(FD). 9.4.3 Define feasible successor(FS). Define feasibility condition (FC). Define Reported Distance (RD) or Advertised Distance (AD) 9.4.4 Where are the successor, feasible distance, and any feasible successors with their reported distances kept by a router? What command will show you the topology database? 220.127.116.11 Know each piece of the topology table. 9.4.6 What is the centerpiece of EIGRP is DUAL and its EIGRP route-calculation engine called? What does the FSM define? 18.104.22.168 What happens after the interface is shut down? 22.214.171.124 What state does DUAL place a route in if the successor goes down and there is no feasible successor? What happens if the sender does not receive replies that have a route to the network? 9.5.1 What happens if a packet matches the parent route but not any of the child routes? What happens is you disable auto summarization? 126.96.36.199 What happens to all adjacencies after the no auto- summary command is issued? 9.5.3 What command is used to enter a manual route summarization? What happens to the routing table after the above command is entered? 9.5.4 What type of route can be used with any of the routing protocols we have used so far? What command is used to include a static default route with its EIGRP routing updates? What does a default route provide a default path to? 9.5.5 What can be changed to improve EIGRP? 188.8.131.52 What are the two areas discussed that can also be fine tuned? What happens if the hold time is not adjusted when the hello interval is adjusted? What should the hold time be set to?
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