Practice 350-401 EIGRP questions with full explanations on every answer.
Start practicing
EIGRP — choose a session length
Free · No account required
Click any question to see the full explanation and answer options, or start a focused practice session above.
A network engineer is troubleshooting an EIGRP issue in a large enterprise network. Two routers, R1 and R2, are connected via a T1 link. R1 is learning a route to 10.0.0.0/8 from R2 with a metric of 28160, but the same route is also learned from another neighbor with a metric of 26880. The engineer notices that the route from R2 is not being installed in the routing table. What is the most likely cause?
2An engineer configures EIGRP on a new router in a DMVPN network. The router has a single physical interface with two subinterfaces: one for the DMVPN tunnel and one for a direct point-to-point link to a hub router. The engineer notices that EIGRP adjacencies form only on the point-to-point link, not on the DMVPN tunnel. The tunnel interface is configured with ip nhrp network-id 1 and ip nhrp nhs 10.1.1.1. What is the most likely reason?
3A network engineer is designing an EIGRP network with multiple routers. The network has a core layer where all routers are fully meshed. The engineer wants to ensure that if a link fails, EIGRP converges quickly without relying on route redistribution or static routes. The engineer configures EIGRP with default timers. However, during a failure simulation, convergence takes over 15 seconds. What is the most likely reason?
4An engineer is troubleshooting an EIGRP issue where a router is not learning a specific route from a neighbor. The engineer runs 'show ip eigrp topology all-links' and sees the route in the topology table with a feasible distance of 100 and a reported distance of 120. The neighbor's advertised distance is 80. The router's own computed distance to the network is 150. The route is not in the routing table. What is the most likely cause?
5A network engineer is configuring EIGRP on a router that connects to multiple remote sites via Frame Relay. The engineer wants to ensure that EIGRP does not form adjacencies over the Frame Relay interfaces to reduce overhead, but still wants to advertise the connected networks. The engineer applies the 'passive-interface' command to the Frame Relay interfaces. However, the remote sites stop receiving the routes. What is the most likely reason?
6An engineer is troubleshooting an EIGRP convergence issue in a network with redundant links. The engineer notices that when a primary link fails, the backup link takes over immediately, but the routing table shows the route with a higher metric. The engineer wants to ensure that the backup link is used only when the primary fails, and that traffic is not load-balanced. The engineer has configured 'variance 2' on all routers. What is the most likely effect of this configuration?
7A network engineer is configuring EIGRP on a router that connects to a service provider network. The engineer wants to advertise a default route to internal routers. The engineer configures 'ip default-network 0.0.0.0' and redistributes a static default route into EIGRP. However, internal routers are not receiving the default route. The engineer checks the EIGRP topology table and sees the default route with a metric of 1. What is the most likely reason?
8A network engineer is designing an EIGRP network with multiple routers in a hub-and-spoke topology. The engineer wants to ensure that the spoke routers do not become transit routers for traffic between other spokes. The engineer configures 'eigrp stub' on the spoke routers. However, after configuration, the spoke routers stop learning some routes from the hub. What is the most likely reason?
9A network engineer is troubleshooting an EIGRP issue where two routers, R1 and R2, are directly connected. R1 shows an EIGRP adjacency with R2, but R2 does not show an adjacency with R1. The engineer checks the interface configurations and finds that R1 has 'ip authentication mode eigrp 1 md5' and 'ip authentication key-chain eigrp 1 MYKEY' configured, while R2 has no authentication configured. What is the most likely cause?
10A network engineer runs the following command on Router R1: R1# show ip eigrp neighbors EIGRP-IPv4 Neighbors for AS(100) H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 192.168.1.2 Gi0/0 13 00:12:34 12 100 0 45 1 10.1.1.2 Gi0/1 12 00:10:20 15 120 0 32 Based on this output, what can be concluded?
11A network engineer runs the following command on Router R1: R1# show ip eigrp topology EIGRP-IPv4 Topology Table for AS(100)/ID(192.168.1.1) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 10.1.1.0/24, 1 successors, FD is 1310720 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 P 10.2.2.0/24, 1 successors, FD is 1310720 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 P 10.3.3.0/24, 1 successors, FD is 1310720 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 Based on this output, what can be concluded?
12A network engineer runs the following command on Router R1: R1# show ip eigrp interfaces detail EIGRP-IPv4 Interfaces for AS(100) Interface: GigabitEthernet0/0 Mtu: 1500, Bandwidth: 1000000 Kbit, Delay: 100 microseconds Reliability: 255/255, Load: 1/255, Min MTU: 1500 Hello interval: 5 sec, Hold time: 15 sec Next hello in: 3 secs Passive interface: No Split horizon: Enabled Authentication: None Neighbor count: 1 Interface: GigabitEthernet0/1 Mtu: 1500, Bandwidth: 100000 Kbit, Delay: 1000 microseconds Reliability: 255/255, Load: 1/255, Min MTU: 1500 Hello interval: 5 sec, Hold time: 15 sec Next hello in: 1 secs Passive interface: No Split horizon: Enabled Authentication: None Neighbor count: 1 Based on this output, what can be concluded?
13A network engineer runs the following command on Router R1: R1# show ip eigrp traffic EIGRP-IPv4 Traffic Statistics for AS(100) Hellos sent/received: 1000/950 Updates sent/received: 45/40 Queries sent/received: 2/3 Replies sent/received: 3/2 Acks sent/received: 50/48 Input queue high water mark: 1 Input queue depth: 0 Total packets sent: 1100 Total packets received: 1043 Based on this output, what can be concluded?
14A network engineer runs the following command on Router R1: R1# show ip eigrp topology 10.1.1.0/24 EIGRP-IPv4 Topology Entry for AS(100)/ID(192.168.1.1) for 10.1.1.0/24 State: Passive, Reply status: 0, Originating router: 192.168.1.1 Routing Descriptor Blocks: 0.0.0.0 (Null0), from 0.0.0.0, Send flag: 0x0 Composite metric: (128256/0), Route is Internal Vector metric: Minimum bandwidth: 1000000 Kbit Total delay: 100 microseconds Reliability: 255/255 Load: 1/255 Minimum MTU: 1500 Hop count: 0 192.168.1.2 (GigabitEthernet0/0), from 192.168.1.2, Send flag: 0x0 Composite metric: (1310720/128256), Route is Internal Vector metric: Minimum bandwidth: 1000000 Kbit Total delay: 1100 microseconds Reliability: 255/255 Load: 1/255 Minimum MTU: 1500 Hop count: 1 Based on this output, what can be concluded?
15A network engineer runs the following command on Router R1: R1# debug eigrp packets hello EIGRP: Received HELLO on Gi0/0 nbr 192.168.1.2 AS 100, Flags 0x0, Seq 0/0 interfaceQ 0/0 EIGRP: Sending HELLO on Gi0/0 AS 100, Flags 0x0, Seq 0/0 interfaceQ 0/0 EIGRP: Received HELLO on Gi0/1 nbr 10.1.1.2 AS 100, Flags 0x0, Seq 0/0 interfaceQ 0/0 EIGRP: Sending HELLO on Gi0/1 AS 100, Flags 0x0, Seq 0/0 interfaceQ 0/0 Based on this output, what can be concluded?
16A network engineer runs the following command on Router R1: R1# show ip eigrp neighbors detail EIGRP-IPv4 Neighbors for AS(100) H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 192.168.1.2 Gi0/0 13 00:12:34 12 100 0 45 Version 2.0/2.0, Retrans: 0, Retry: 0, Maxseq: 0 Prefixes: 3 Topology ids: 0 Authentication: None Topology: base (0x0) Based on this output, what can be concluded?
17A network engineer runs the following command on Router R1: R1# show ip eigrp interfaces EIGRP-IPv4 Interfaces for AS(100) Interface Peers Xmit Queue Mean Pacing Time Multicast Pending Un/Reliable SRTT Un/Reliable Flow Timer Routes Gi0/0 1 0/0 12 0/10 50 0 Gi0/1 1 0/0 15 0/10 55 0 Based on this output, what can be concluded?
18A network engineer runs the following command on Router R1: R1# show ip eigrp topology all-links EIGRP-IPv4 Topology Table for AS(100)/ID(192.168.1.1) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 10.1.1.0/24, 1 successors, FD is 1310720, serno 5 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 via 10.2.2.2 (1587200/1310720), GigabitEthernet0/1 P 10.2.2.0/24, 1 successors, FD is 1310720, serno 6 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 via 10.2.2.2 (1587200/1310720), GigabitEthernet0/1 Based on this output, what can be concluded?
19Consider the following EIGRP configuration on a Cisco IOS router: router eigrp 100 network 10.0.0.0 passive-interface default no passive-interface GigabitEthernet0/1 What is the effect of this configuration?
20Given the following EIGRP configuration on a router: router eigrp 200 network 192.168.1.0 0.0.0.255 network 10.0.0.0 Which statement about this configuration is true?
21Examine the following EIGRP configuration snippet: interface GigabitEthernet0/0 ip bandwidth-percent eigrp 100 50 What is the effect of this command?
22Consider the following EIGRP configuration: router eigrp 100 metric weights 0 1 0 1 0 0 What does this configuration accomplish?
23Given the following EIGRP named mode configuration: router eigrp TEST address-family ipv4 unicast autonomous-system 100 network 10.0.0.0 0.255.255.255 topology base distance eigrp 90 170 exit-address-family Which statement is true?
24Examine the following EIGRP configuration for route summarization: interface GigabitEthernet0/0 ip summary-address eigrp 100 192.168.0.0 255.255.252.0 What is the effect of this command?
25What is the default EIGRP hello interval on a point-to-point serial link?
26Which of the following is used by EIGRP to calculate the feasible distance (FD) of a route?
27What is the default hold time multiplier for EIGRP?
28Drag and drop the steps of EIGRP DUAL route computation into the correct order, from first to last.
29Drag and drop the steps of EIGRP neighbor establishment into the correct order, from first to last.
30Drag and drop the steps of EIGRP route summarization configuration into the correct order, from first to last.
31Drag and drop the steps of EIGRP stub configuration for hub-and-spoke into the correct order, from first to last.
32Drag and drop the steps of EIGRP authentication using MD5 key-chain into the correct order, from first to last.
33Drag and drop the steps of EIGRP named mode configuration steps into the correct order, from first to last.
34Drag and drop the steps of EIGRP redistribution from OSPF with metric seeding into the correct order, from first to last.
35Drag and drop the steps of EIGRP variance-based unequal-cost load balancing into the correct order, from first to last.
36Drag and drop the steps of EIGRP stub configuration for hub-and-spoke into the correct order, from first to last.
37Drag and drop the steps of EIGRP authentication using MD5 key-chain into the correct order, from first to last.
38Drag and drop the steps of EIGRP named mode configuration steps into the correct order, from first to last.
39Drag and drop the steps of EIGRP redistribution from OSPF with metric seeding into the correct order, from first to last.
40Drag and drop the steps of EIGRP variance-based unequal-cost load balancing into the correct order, from first to last.
41Drag and drop each EIGRP packet type on the left to its matching function on the right.
42Drag and drop each EIGRP metric component on the left to its matching K variable on the right.
43Drag and drop each EIGRP router role on the left to its matching definition on the right.
44Drag and drop each EIGRP state on the left to its matching DUAL stage on the right.
45Drag and drop each EIGRP timer on the left to its matching default value on the right.
46Drag and drop each EIGRP packet type on the left to its matching function on the right.
47Drag and drop each EIGRP metric component on the left to its matching variable on the right.
48Drag and drop each EIGRP router role on the left to its matching definition on the right.
49Drag and drop each EIGRP DUAL state on the left to its matching stage on the right.
50Drag and drop each EIGRP timer on the left to its matching default value on the right.
51Which two statements about EIGRP feasible successors are true? (Choose two.)
52Which three statements about EIGRP packet types are true? (Choose three.)
53Which two statements about EIGRP route summarization are true? (Choose two.)
54Which three statements about EIGRP stub routing are true? (Choose three.)
55Which two statements about EIGRP feasible successors are true? (Choose two.)
56Which two statements about EIGRP stub routing are true? (Choose two.)
57Which three statements about EIGRP named mode configuration are true? (Choose three.)
58Which three statements about EIGRP route summarization are true? (Choose three.)
The EIGRP domain covers the key concepts tested in this area of the 350-401 exam blueprint published by Cisco. Courseiva provides free domain-focused practice, mock exams, missed-question review, and readiness tracking across all 350-401 domains — no account required.
The Courseiva 350-401 question bank contains 58 questions in the EIGRP domain. Click any question to see the full explanation and answer breakdown.
Start with a 10-question focused session to identify your baseline accuracy in this domain. Read every explanation — even for questions you answer correctly — to understand the reasoning. Once you score consistently above 80%, move to a 20–30 question session to confirm depth before moving to the next domain.
Yes — the session launcher on this page draws questions exclusively from the EIGRP domain. Choose 10, 20, 30, or 50 questions for a focused session, or click individual questions to review them one by one.
Save your results, see per-domain analytics, and get readiness scores — free, for every certification.
Sign Up FreeFree forever · Every certification included