CCNP: EIGRP Exam Trivia Questions! Quiz
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Today we’ll be looking at a mix of basic and advanced questions to see if you have what it takes to become a Cisco Certified Network Professional. Whether you want to end up as a network administrator, an engineer or an operations specialist, these questions should have you covered.
Questions and Answers
- 1.
K3 refers to which K value?
- A.
MTU
- B.
Bandwidth
- C.
Reliability
- D.
Delay
- E.
Loading
Correct Answer
D. DelayExplanation
The correct answer is Delay. In networking, K3 refers to the delay value. Delay is the amount of time it takes for a packet to travel from the source to the destination. It is an important parameter in determining the performance and efficiency of a network. By adjusting the delay value, network administrators can control the speed and responsiveness of the network.Rate this question:
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- 2.
K2 refers to which K value?
- A.
Delay
- B.
MTU
- C.
Load
- D.
Bandwidth
- E.
Reliability
Correct Answer
C. LoadExplanation
K2 refers to the Load value. In networking, Load refers to the amount of traffic or data being transmitted over a network. K values are often used to represent different network parameters, and in this case, K2 specifically represents the Load value.Rate this question:
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- 3.
The statement "How far the destination is away from your neighbor" is referred to as being what within EIGRP terminology?
- A.
Advertised Distance
- B.
Successor
- C.
Feasible Distance
- D.
Feasibility Condition
Correct Answer
A. Advertised DistanceExplanation
The term "advertised distance" in EIGRP refers to how far the destination is away from the neighbor. It is a metric that is used to determine the best path for routing.Rate this question:
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- 4.
A unicast update is sent to a neighbor EIGRP router, what type of packet will be sent back to the neighbor that originated the update?
- A.
UPDATE
- B.
QUERY
- C.
REPLY
- D.
ACK
- E.
NO PACKET WILL BE SENT BECAUSE THE UPDATE WAS UNICAST
Correct Answer
D. ACKExplanation
When a unicast update is sent to a neighbor EIGRP router, the neighbor that originated the update will receive an ACK packet in response. This ACK packet serves as a confirmation that the update was successfully received by the neighbor.Rate this question:
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- 5.
For EIGRP neighbors to form what criteria must be matched?
- A.
Process number
- B.
AS number
- C.
Hello and Hold Timers
- D.
K values
- E.
Subnet
- F.
Router IDs
- G.
Area ID
- H.
Authentication (if used)
Correct Answer(s)
B. AS number
D. K values
E. Subnet
H. Authentication (if used)Explanation
To form EIGRP neighbors, the routers must match the AS number, K values, subnet, and authentication (if used). The AS number is used to identify the autonomous system, and routers in the same AS can form neighbors. K values are used to calculate the metric for route selection, and they must be the same for routers to become neighbors. The subnet must be the same for routers to communicate with each other. If authentication is enabled, routers must use the same authentication method and key to form neighbors.Rate this question:
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- 6.
EIGRP is not sending subnet mask information in updates, how can you fix this so that it sends the subnet mask information? EIGRP default settings are in place
- A.
No auto-summary
- B.
Advertise the networks using a specific wild card mask
- C.
Auto-summary
- D.
Manual summarization
Correct Answer
A. No auto-summaryExplanation
Enabling the "no auto-summary" command in EIGRP configuration will fix the issue of EIGRP not sending subnet mask information in updates. By default, EIGRP summarizes network routes at classful boundaries, which means it does not include subnet mask information in updates. However, by disabling auto-summary with the "no auto-summary" command, EIGRP will advertise the networks using their specific subnet mask information, allowing the correct transmission of subnet mask information in updates.Rate this question:
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- 7.
You issue the show ip eigrp neighbors command and notice the Q Cnt is displaying a value of 5. What does this indicate?
- A.
Possible congestion on network
- B.
Number of errors received
- C.
Number of hello packets waiting to be sent
- D.
Number of ACK packets waiting to be sent
Correct Answer
A. Possible congestion on networkExplanation
A Q Cnt value of 5 indicates possible congestion on the network. The Q Cnt stands for Queue Count and it represents the number of packets waiting in the queue to be processed. If the Q Cnt value is high, it suggests that there is a large number of packets waiting to be processed, which can be a sign of congestion. This means that the network may be experiencing heavy traffic or bottleneck issues, causing delays in packet processing and potentially impacting network performance.Rate this question:
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- 8.
Which of the following neighbors formed adjaceny with this router first? H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 2 10.1.5.2 Se1/2 13 00:00:14 0 5000 1 0 1 10.1.3.1 Se1/0 13 01:22:54 227 1362 0 385 0 10.1.4.1 Se1/1 10 01:24:08 182 1140 0 171
- A.
10.1.5.2
- B.
10.1.4.1
Correct Answer
B. 10.1.4.1Explanation
The correct answer is 10.1.4.1. This can be determined by looking at the "Address" column in the given table. The router's first neighbor is the one with the lowest address, which in this case is 10.1.4.1.Rate this question:
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- 9.
Using Load and Reliability K values is not a good idea because they are dynamic unlike Bandwidth and Delay which are static
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because Load and Reliability K values are dynamic, meaning they can change over time. This makes them unreliable for making long-term decisions or predictions. On the other hand, Bandwidth and Delay are static, meaning they remain constant, making them more reliable for making decisions and predictions. Therefore, using Load and Reliability K values is not a good idea compared to using Bandwidth and Delay.Rate this question:
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- 10.
RouterA,B and C are connected up together and they both have seperate Ethernet segments connected to them. All interfaces are being advertised into EIGRP. Defaults are in place.The no summary command is being used. the LAN network connected to router B fails. What will happen as a result? and what could potentially occur afterwards?
- A.
Router B will not send out any queries because of no summary
- B.
Router B sends out query packets to A and C
- C.
Routers A and C will query Router B
- D.
Queries will be sent around in a loop
- E.
If a reply comes back from Router C but not A then B goes SIA
Correct Answer(s)
B. Router B sends out query packets to A and C
E. If a reply comes back from Router C but not A then B goes SIAExplanation
When the LAN network connected to Router B fails, Router B will send out query packets to Router A and Router C. If a reply comes back from Router C but not from Router A, Router B will go into the Stuck-In-Active (SIA) state. In this state, Router B will stop sending queries and will not participate in the EIGRP routing process until the SIA timer expires. After the SIA timer expires, Router B will rejoin the EIGRP process and continue sending queries.Rate this question:
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- 11.
An EIGRP sends out queries but does not receive all of them back. The SIA timer of 3minutes has expired. What happens now?
- A.
Router will send out a SIA Request
- B.
Route will be marked as passive
- C.
Adjaceny will drop
- D.
Nothing
Correct Answer
C. Adjaceny will dropExplanation
When the SIA (Stuck-in-Active) timer of 3 minutes expires in EIGRP, it means that the router has not received replies to all its queries. In this case, the adjacency between the routers will be dropped. This happens because the router assumes that the neighboring routers are no longer reachable or functioning properly. The dropped adjacency will trigger the router to recompute its routes and try to establish new adjacencies with other routers.Rate this question:
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- 12.
K1 is which metric?
- A.
Bandwidth
- B.
MTU
- C.
Delay
- D.
Load
Correct Answer
A. BandwidthExplanation
K1 is the metric that represents the bandwidth. Bandwidth refers to the maximum amount of data that can be transmitted over a network in a given amount of time. It is typically measured in bits per second (bps) or kilobits per second (Kbps). K1, in this context, is likely a specific variable or identifier used to represent the bandwidth metric in a particular system or scenario.Rate this question:
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- 13.
Loading is which K value
- A.
K5
- B.
K3
- C.
K2
- D.
K4
- E.
K1
Correct Answer
C. K2Explanation
The correct answer is K2 because the question asks for the value of "Loading" and K2 is the option that corresponds to this value.Rate this question:
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- 14.
With auto summary enabled on EIGRP the subnet mask is always sent in updates
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
With auto summary enabled on EIGRP, the subnet mask is not always sent in updates. Auto summary is a feature in EIGRP that automatically summarizes routes at network boundaries. When auto summary is enabled, EIGRP summarizes routes based on their classful network boundaries, which means that the subnet mask is not included in the updates. This can lead to suboptimal routing and potential connectivity issues, especially in networks with variable subnet masks. Therefore, the statement is false.Rate this question:
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- 15.
An EIGRP router doing manual summarization will have null 0 assigned to this summary.This means forward all packets destined for that network to null 0 which is a blackhole and therefore will be discarded.It helps prevent routing loops.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
When an EIGRP router is configured to perform manual summarization, it assigns the null 0 interface to the summary route. This means that any packets destined for a network within that summary range will be forwarded to the null 0 interface, which acts as a blackhole and discards the packets. This helps prevent routing loops by ensuring that packets are not continuously routed in circles. Therefore, the statement "An EIGRP router doing manual summarization will have null 0 assigned to this summary" is true.Rate this question:
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- 16.
You carry out manual summarization on the following prefixes: 192.168.0.0/27 (90/2000) 192.168.0.32/27 (90/1234) 192.168.0.64/27 (90/5400) SUmmary route is 192.168.0.0/25. What will be the admin distance/metric for the summary route being advertised
- A.
5/2000
- B.
5/1234
- C.
170/1234
- D.
5/5400
Correct Answer
B. 5/1234Explanation
The lowest metric for a specific route will be used for the summary route. 5 is the AD for summary routesRate this question:
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- 17.
On your router which you are trying to setup through the Frame relay cloud to your spoke routers, you configure the DLCI and remote IP addresses but forget to add on the broadcast key word. You wait several minutes but EIGRP adjaceny has not formed. You are using point to multipoint sub interfaces. How can you resolve this easily?
- A.
Change the frame map statement to frame relay interface dlci
- B.
Change the lmi type
- C.
Give up
- D.
Add neighbor statements on the hub router
Correct Answer
D. Add neighbor statements on the hub routerExplanation
By adding neighbor statements on the hub router, you can easily resolve the issue of the EIGRP adjacency not forming. The neighbor statements will establish a neighbor relationship between the hub router and the spoke routers, allowing EIGRP to form adjacencies and exchange routing information.Rate this question:
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- 18.
Your frame relay provider has given you a CIR of 256Kb and your connection to the cloud is using a T1 line. You want to configure EIGRP. You are using physical interfaces.EIGRP AS 1. What must you do to ensure EIGRP packets do not overwhelm the network?
- A.
Change the bandwidth to 1544 on the physical interface
- B.
Type ip bandwidth-percent eigrp 1 80 on the physical interface
- C.
Type bandwidth 256 on the physical interface
- D.
Type ip bandwidth-percent eigrp 1 256 on the serial interface
Correct Answer
C. Type bandwidth 256 on the physical interfaceExplanation
You must configure the serial interface to reflect exactly what the FR has given you in CIR.This rule only applies when you have a physical interface and not subinterfacesRate this question:
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- 19.
On a FR network, you have three routers running EIGRP. Hub and spoke.Each router has a physical interface with a BW=500Kb ps. What is the BW that you should configure on the hub
- A.
500
- B.
768
- C.
250
- D.
1500
Correct Answer
D. 1500Explanation
The correct answer is 1500 because in a hub and spoke network, the hub acts as a central point that connects all the spokes. Since the hub is responsible for handling the traffic from all the spokes, it needs to have a higher bandwidth than the spokes. In this case, each router has a physical interface with a bandwidth of 500Kbps, so the hub should have a bandwidth that can handle the combined traffic from all three routers, which is 3 * 500Kbps = 1500Kbps.Rate this question:
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- 20.
In a hub and spoke FR networking running EIGRP. You are using p2p sub interfaces. The hub router has a 1544Mb interface and the spokes are 768. What value should you configure on the hub ?
- A.
512
- B.
768
- C.
256
- D.
1544
Correct Answer
D. 1544Explanation
In a hub and spoke FR networking running EIGRP, the hub router has a 1544Mb interface, which means it has the highest bandwidth among all the routers. Therefore, the value that should be configured on the hub router is 1544, as it can handle the maximum amount of traffic and provide efficient communication between the hub and spokes.Rate this question:
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- 21.
In a hub and spoke FR networking running EIGRP. You are using p2p sub interfaces. The hub router has a 1544Mb interface and the spokes R2 and R3 are 512 and 768 respecitively. What value should you configure on the spoke R3 ?
- A.
1544
- B.
512
- C.
768
- D.
256
Correct Answer
C. 768Explanation
In a hub and spoke FR networking running EIGRP, the hub router has a 1544Mb interface and the spokes R2 and R3 are 512 and 768 respectively. Since the question asks for the value to configure on the spoke R3, the correct answer is 768. This is because the value to configure on the spoke should match its interface capacity, and in this case, R3 has a capacity of 768Mb.Rate this question:
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- 22.
The CIR of the three EIGRP routers in FR network vary. R1 is the hubeand has been given a CIR=2048Kb. R2 the spoke has a CIR=1544kB AND R3 has a CIR=512Kb. What BW should you configure on the hub? ALL routers are using phsyical interfaces
- A.
1536
- B.
2048
- C.
512
- D.
1544
Correct Answer
A. 1536Explanation
The CIR (committed information rate) is the maximum average rate at which data can be transmitted between two devices. In this scenario, the hub (R1) has a CIR of 2048Kb, while the spoke routers (R2 and R3) have lower CIR values. The hub should be configured with a bandwidth (BW) of 1536Kb, which is the lowest CIR among the spoke routers. This ensures that the hub's bandwidth matches the capacity of the spoke routers, preventing congestion and ensuring efficient data transmission.Rate this question:
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- 23.
The CIR of the three EIGRP routers in FR network vary. R1 is the hub and has been given a CIR=2048Kb. R2 the spoke has a CIR=1544kB AND R3 has a CIR=512Kb. What BW should you configure on the hub? ALL routers are using multipoint interfaces
- A.
2048
- B.
4104
- C.
1536
- D.
512
Correct Answer
B. 4104Explanation
The CIR (committed information rate) represents the guaranteed bandwidth that can be used by a router. In a multipoint network, the CIR of the hub should be equal to the sum of the CIRs of all the spokes. In this case, the CIR of R1 (hub) is 2048Kb, the CIR of R2 (spoke) is 1544Kb, and the CIR of R3 (spoke) is 512Kb. Therefore, to configure the correct bandwidth on the hub, we need to add the CIRs of all the spokes: 2048 + 1544 + 512 = 4104Kb.Rate this question:
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- 24.
Which of the following can be both unicast and multicast?
- A.
Query
- B.
Ack
- C.
Update
- D.
Reply
- E.
Hello
Correct Answer
C. UpdateExplanation
The correct answer is "update" because it can be sent to a single destination (unicast) or multiple destinations (multicast).Rate this question:
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- 25.
Which of the following are ONLY unicast?
- A.
Reply
- B.
Hello
- C.
Update
- D.
Query
Correct Answer
A. ReplyExplanation
The term "unicast" refers to a type of network communication where data is sent from one sender to one receiver. In this case, the only option that fits this criteria is "reply", as it implies a response from one specific sender to another specific receiver. The other options ("hello", "update", and "query") do not necessarily imply a one-to-one communication and can be used for multicast or broadcast purposes as well.Rate this question:
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- 26.
EIGRP stub routers advertising only connected and/or summary routes have benefits such as? 3 obvious ones please
- A.
Lowers amount of queries flying around
- B.
Makes their IP routing tables smaller
- C.
Less updates are sent
- D.
They wont be used as a transit area
- E.
Prevents sub optimal routing
Correct Answer(s)
A. Lowers amount of queries flying around
D. They wont be used as a transit area
E. Prevents sub optimal routingExplanation
The benefits of EIGRP stub routers advertising only connected and/or summary routes are as follows:
1. Lowering the amount of queries flying around: By advertising only connected and/or summary routes, the router reduces the number of queries sent to other routers in the network, thereby reducing network traffic and improving overall network efficiency.
2. They won't be used as a transit area: Stub routers only advertise routes that are directly connected to them or summarized routes. This prevents them from being used as a transit area for routing traffic between other routers, which can help improve network security and reduce unnecessary network congestion.
3. Preventing suboptimal routing: By advertising only connected and/or summary routes, stub routers ensure that traffic is directed along the most efficient paths in the network. This helps prevent suboptimal routing, where traffic may be unnecessarily routed through multiple routers, leading to increased latency and decreased network performance.Rate this question:
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