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Cisco 300-410 Practice Test - Questions Answers, Page 7
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Question 61
After some changes in the routing policy, it is noticed that the router in AS 45123 is being used as a transit AS router for several service provides. Which configuration ensures that the branch router in AS 45123 advertises only the local networks to all SP neighbors?
By default BGP advertises all prefixes to external BGP neighbors. This means that if you are multi-homed (connected to two or more ISPs) then you might become a transit AS. For example, ISP 2 in AS 200 can send traffic to your router in AS 100 to reach ISP 3 in AS 300 because you advertised prefixes in ISP 3 to ISP 2.
This is what will be seen in the BGP routing table of ISP1:
Question 62
Refer to the exhibit.
Redistribution is enabled between the routing protocols, and nowPC2 PC3, and PC4 cannot reach PC1. What are the two solutions to fix the problem? (Choose two.)
Filter RIP routes back into RIP when redistributing into RIP in R2
Filter OSPF routes into RIP FROM EIGRP when redistributing into RIP in R2.
Filter all routes except RIP routes when redistributing into EIGRP in R2.
Filter RIP AND OSPF routes back into OSPF from EIGRP when redistributing into OSPF in R2
Filter all routes except EIGRP routes when redistributing into OSPF in R3.
Even PC2 cannot reach PC1 so there is something wrong with RIP redistribution in R2. Because RIP has higher Administrative Distance (AD) value than OSPF and EIGRP so it will be looped when doing mutual redistribution.
Question 63
Refer to the exhibit.
A company is evaluating multiple network management system tools. Trending graphs generated by SNMP data are returned by the NMS and appear to have multiple gaps. While troubleshooting the issue, an engineer noticed the relevant output. What solves the gaps in the graphs?
Remove the exceed-rate command in the class map.
Remove the class map NMS from being part of control plane policing.
Configure the CIR rate to a lower value that accommodates all the NMS tools
Separate the NMS class map in multiple class maps based on the specific protocols with appropriate CoPP actions
Reference:
https://tools.cisco.com/security/center/resources/copp_best_practicesThe class-map NMS in the exhibit did not classify traffic into specific protocols so many packetswere dropped. We should create some class-map to classify the receiving traffic. It is also arecommendation of CoPP/CPP policy:
"Developing a CPP policy starts with the classification of the control plane traffic. To that end, the control plane traffic needs to be first identified and separated into different class maps."
Question 64
What is a role of route distinguishers in an MPLS network?
Route distinguishers define which prefixes are imported and exported on the edge router
Route distinguishers allow multiple instances of a routing table to coexist within the edge router.
Route distinguishers are used for label bindings.
Route distinguishers make a unique VPNv4 address across the MPLS network
Question 65
Refer to the exhibit.
AAA server 10.1.1.1 is configured with the default authentication and accounting settings, but the switch cannot communicate with the server Which action resolves this issue?
Match the authentication port
Match the accounting port
Correct the timeout value.
Correct the shared secret.
Command Default
Accounting port: 1813
Authentication port: 1812
Accounting: enabled
Authentication: enabled
Retransmission count: 1
Idle-time: 0
Server monitoring: disabled
Timeout: 5 seconds
Test username: test
Test password: test
Reference:
https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/n5k/commands/radius-serverhost.htmlBy default, RADIUS uses UDP port 1812 for authentication and port 1813 for accounting. In theexhibit above we see port 1814 is being used for authentication to AAA server at 10.1.1.1 whichis not the default port so we must adjust the authentication port to the default value 1812.
Question 66
Refer to the exhibit.
The network administrator configured VRF lite for customer
The technician at the remote site misconfigured VRF on the router. Which configuration will resolve connectivity for both sites of customer_a?
Option A
Option B
Option C
Option D
From the exhibit, we learned:
+ VRF customer_a was exported with Route target (RT) of 1:1 so at the remote site it must be imported with the same RT 1:1.
+ VRF customer_a was imported with Route target (RT) of 1:1 so at the remote site it must be exported with the same RT 1:1.
Therefore at the remote site we must configure the command "route-target both 1:1" (which is equivalent to two commands "route-target import 1:1" & "route-target export 1:1".
Question 67
What is a function of IPv6 ND inspection?
It learns and secures bindings for stateless autoconfiguration addresses in Layer 3 neighbor tables
It learns and secures bindings for stateless autoconfiguration addresses in Layer 2 neighbor tables
It learns and secures bindings for stateful autoconfiguration addresses in Layer 2 neighbor tables.
It learns and secures bindings for stateful autoconfiguration addresses in Layer 3 neighbor tables.
Question 68
Exhibit:
BGP is flapping after the Copp policy is applied. What are the two solutions to fix the issue?
(Choose two)
Configure BGP in the COPP-CRITICAL-7600 ACL
Configure a higher value for CIR under the default class to allow more packets during peak traffic
Configure a higher value for CIR under the class COPP-CRITICAL-7600
Configure a three-color policer instead of two-color policer under class COPP-CRITICAL- 7600
Configure IP CEF to CoPP policy and BGP to work
The policy-map COPP-7600 only rate-limit HTTP & HTTPS traffic (based on the ACLconditions) so any BGP packets will be processed in the class "class-default", which dropsexceeded BGP packets. Therefore we have two ways to solve this problem:
+ Add BGP to the ACL with the statement "permit tcp any any eq bgp"
+ Configure higher value for CIR in default class as 2Mbps is too low for web traffic (http & https)
Question 69
What is an advantage of using BFD?
It detects local link failure at layer 1 and updates routing table.
It detects local link failure at layer 2 and updates routing protocols.
It has sub-second failure detection for layer 1 and layer 3 problems.
It has sub-second failure detection for layer 1 and layer 2 problems.
Question 70
Refer the exhibit.
Which action resolves intermittent connectivity observed with the SNMP trap packets?
Decrease the committed burst Size of the mgmt class map
Increase the CIR of the mgmt class map
Add a new class map to match TCP traffic
Add one new entry in the ACL 120 to permit the UDP port 161
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