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Q1. A network administrator is troubleshooting a redistribution of OSPF routes into EIGRP.
router eigrp 1
network 10.0.0.0
!
router ospf 1
network 172.10.0.0 0.0.255.255 area 0
redistribute eigrp 1
Given the exhibited commands, which statement is true?
A. Redistributed routes will have an external type of 1 and a metric of 1.
B. Redistributed routes will have an external type of 2 and a metric of 20.
C. Redistributed routes will maintain their original OSPF routing metric.
D. Redistributed routes will have a default metric of 0 and will be treated as reachable and advertised.
E. Redistributed routes will have a default metric of 0 but will be treated as unreachable and not advertised.
Answer: B
Explanation:
By default, all routes redistributed into OSPF will be tagged as external type 2 (E2) with a metric of 20, except for BGP routes (with a metric of 1).
Note: The cost of a type 2 route is always the external cost, irrespective of the interior cost to reach that route. A type 1 cost is the addition of the external cost and the internal cost used to reach that route.
Q2. Which three TCP enhancements can be used with TCP selective acknowledgments? (Choose three.)
A. header compression
B. explicit congestion notification
C. keepalive
D. time stamps
E. TCP path discovery
F. MTU window
Answer: B,C,D
Q3. Scenario:
You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command.
Which of the following statements is true about the serial links that terminate in R3
A. The R1-R3 link needs the neighbor command for the adjacency to stay up
B. The R2-R3 link OSPF timer values are 30, 120, 120
C. The R1-R3 link OSPF timer values should be 10,40,40
D. R3 is responsible for flooding LSUs to all the routers on the network.
Answer: B
Q4. An EUI-64 bit address is formed by inserting which 16-bit value into the MAC address of a device?
A. 3FFE
B. FFFE
C. FF02
D. 2001
Answer: B
Q5. Refer to the Exhibit.
A network engineer has configured NTP on a Cisco router, but the time on the router is still incorrect. What is the reason for this problem?
A. The router is not syncing with the peer, even though the NTP request and response packets are being exchanged.
B. The router is not syncing with peer, and the NTP request and response packets are not being exchanged.
C. The router is syncing with the peer, and the NTP request and response packets are being exchanged.
D. The router is dropping all NTP packets.
Answer: A
Q6. CORRECT TEXTJS Industries has expanded their business with the addition of their first remote office. The remote office router (R3) was previously configured and all corporate subnets were reachable from R3. JS Industries is interested in using route summarization along with the EIGRP Stub Routing feature to increase network stability while reducing the memory usage and bandwidth utilization to R3. Another network professional was tasked with implementing this solution. However, in the process of configuring EIGRP stub routing connectivity with the remote network devices off of R3 has been lost.
Currently EIGRP is configured on all routers R2, R3, and R4 in the network. Your task is to identify and resolve the cause of connectivity failure with the remote office router R3. Once the issue has been resolved you should complete the task by configuring route
summarization only to the remote office router R3.
You have corrected the fault when pings from R2 to the R3 LAN interface are successful, and the R3 IP routing table only contains 2 10.0.0.0 subnets.
Answer:
Here are the solution as below:
Explanation:
First we have to figure out why R3 and R4 can not communicate with each other. Use the show running-config command on router R3.
Notice that R3 is configured as a stub receive-only router. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system. This keyword will also prevent any type of route from being sent. Therefore we will remove this command and replace it with the eigrp stub command: R3# configure terminal R3(config)# router eigrp 123 R3(config-router)# no eigrp stub receive-only R3(config-router)# eigrp stub
R3(config-router)# end
Now R3 will send updates containing its connected and summary routes to other routers. Notice that the eigrp stub command equals to the eigrp stub connected summary because the connected and summary options are enabled by default.
Next we will configure router R3 so that it has only 2 subnets of 10.0.0.0 network. Use the show ip route command on R3 to view its routing table:
Because we want the routing table of R3 only have 2 subnets so we have to summary sub- networks at the interface which is connected with R3, the s0/0 interface of R4.
There is one interesting thing about the output of the show ip route shown above: the 10.2.3.0/24, which is a directly connected network of R3. We canu2021t get rid of it in the routing table no matter what technique we use to summary the networks. Therefore, to make the routing table of R3 has only 2 subnets we have to summary other subnets into one subnet.
In the output if we donu2021t see the summary line (like 10.0.0.0/8 is a summaryu2026) then we should use the command ip summary-address eigrp 123 10.2.0.0 255.255.0.0 so that all the ping can work well.
In conclusion, we will use the ip summary-address eigrp 123 10.2.0.0 255.255.0.0 at the interface s0/0 of R4 to summary.
R4> enable R4# conf t
R4(config)# interface s0/0 R4(config-if)# ip summary-address eigrp 123 10.2.0.0 255.255.0.0
Now we jump back to R3 and use the show ip route command to verify the effect, the output is shown below:
Note: Please notice that the IP addresses and the subnet masks in your real exam might be different so you might use different ones to solve this question.
Just for your information, notice that if you use another network than 10.0.0.0/8 to summary, for example, if you use the command ip summary-address eigrp 123 10.2.0.0
255.255.0.0 you will leave a /16 network in the output of the show ip route command.
But in your real exam, if you donu2021t see the line "10.0.0.0/8 is a summary, Null0" then you can summarize using the network 10.2.0.0/16. This summarization is better because all the pings can work well.
Finally donu2021t forget to use the copy run start command on routers R3 and R4 to save the configurations.
R3(config-if)# end R3# copy run start R4(config-if)# end R4# copy run start
If the u201ccopy run startu201d command doesnu2021t work then use u201cwrite memory.u201d
Q7. What is the international standard for transmitting data over a cable system?
A. PPPoE
B. DOCSIS
C. CMTS
D. AAL5
Answer: B
Q8. Which two statements about EVNs are true? (Choose two)
A. VRF using MPLS require a trunk interface that use EVN
B. VRF-Lite requires a trunk interface that uses EVN
C. All EVNs within a trunk interface can share the same IP infrastructure
D. Each EVN within a trunk interface must be configured separately
E. Commands that are specified once under a trunk interface can be inherited by all ENVs
Answer: C,E
Q9. By default, which type of IPv6 address is used to build the EUI-64 bit format?
A. unique-local address
B. IPv4-compatible IPv6 address
C. link-local address
D. aggregatable-local address
Answer: C
Explanation: https://howdoesinternetwork.com/2013/slaac-ipv6-stateless-address- autoconfiguration
Q10. A network administrator executes the command clear ip route. Which two tables does this command clear and rebuild? (Choose two.)
A. IP routing
B. FIB
C. ARP cache
D. MAC address table
E. Cisco Express Forwarding table
F. topology table
Answer: A,B
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