Cisco 300-510 Exam Dumps

Cisco 300-510 Sample Question Answers

Question # 1

An engineer is troubleshooting slow performance issues on a customer’s network after the last multicast configuration change was applied on it While checking the running configuration on the router the engineer notices there are many ip igmp join-group commands applied on several interfaces of the router which caused the high CPU utilization usage. What action must the engineer take to solve this issue? 

A. Configure ip igmp static-group command on all interfaces  
B. Remove ip igmp join-group command on all unnecessary interfaces  
C. Configure all router interfaces to be process-switched by increasing the query interval  
D. Remove unnecessary members from the IGMP group  

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Question # 2

For which reason do you deploy BGP confederations within a BGP transit backbone? 

A. to support a larger number of eBGP peer sessions  
B. to increase the number of routes that can be redistributed between the running IGP and BGP 
C. to reduce the number of eBGP routes that must be shared between autonomous systems 
D. to reduce the number of iBGP peering sessions  

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Question # 3

Explanation: Some level of load balancing is achieved by default as BGP prefers shortest AS_PATH for certain prefix (Cisco BGP path selection algorithm - rule 4) . If 1-7 rules gives no preference for certain prefix then with rule 8. Prefer lowest IGP metric to BGP next hop we can force traffic to R2 or R3 influencing load distribution.

A. commit the configuration  
B. roll back the configuration  
C. merge the configuration  
D. save the running configuration  

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Question # 4

In a PIM-SM environment, which mechanism determines the traffic that a receiver receives?

A. The receiver explicitly requests its desired traffic from the RP on the shared tree.  
B. The receiver explicitly requests traffic from a single source, which responds by forwarding all traffic. 
C. The RP on the shared tree floods traffic out of all PIM configured interfaces.  
D. The receiver explicitly requests traffic from each desired source, which responds by sending all traffic. 

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Question # 5

Which two differences should be considered when deciding whether to implement to implement routing policies or route maps? (Choose two.)

A. Sequences are added after implementing a route map, but routing policies must be reconfigured when change is needed.
B. Route maps are implemented using hierarchical policies, but routing policies must be implemented sequentially
C. Route maps require an explicit deny at the end of the sequence, but routing policies have an implicit deny at the end of the program.
D. Route policies require sequence numbers, but route maps are implemented without sequencing. 
E. Route maps are supported in Cisco 10S Software and routing policies are supported in Cisco IOS XR Software. 

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Question # 6

A network operator working for a telecommunication company with an employee id: 4074:92:707 is planning to implement the Nonstop Forwarding (NSR) feature on the customer’s core network. After getting the configuration ready for NSR. on which router should the operator implement NSR changes? 

A. on the CE router  
B. on the ASBR router  
C. on the ABR router  
D. on the PE router  

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Question # 7

A network consultant is troubleshooting IS-IS instances to identify why a routing domains is having communication problems between the two instances. Which description of the possible cause of issues in the routing domain is true?

A. The same interface cannot be advertised in two different IS-IS instances  
B. The IS-IS “ISP” and “ISP2” instances are unrelated and unable to intercommunicate  
C. The configured IS-IS NSEL value is not allowing the routing systems to establish a neighborship 
D. The interface mode ip router is-is command was not included in the script  

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Question # 8

Which cost is the default when redistributing routes from BGP to OSPF? 

A. 20  
B. 1  
C. infinite  
D. automatic  

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Question # 9

What can be used to determine a path from the head-end to a tail-end router when implementing SR-TE with a head-end, with little information on the network topology?

A. traffic controller  
B. path computation engine  
C. tail-end router  
D. SNMP server  

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Question # 10

What is the role of segment routing mapping server? 

A. It advertises a local SID mapping policy to all the mapping clients.  
B. It works with IGP instances to calculate the prefix-SIDs in the absence of a mapping policy
C. It selects multiple mapping entries to create overlapping active mapping policies.  
D. It reads and translates remotely received SIDs from other mapping servers to create SID mapping entries.

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Question # 11

A network engineer is troubleshooting OSPF multiarea. Which Cisco IOS XR feature should the engineer use in order to streamline OSPF issue? 

A. hierarchical CLI 
B. routing process enabled by default on all interfaces  
C. DR support for topology management  
D. show lp ospf topology command  

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Question # 12

You have configured routing policies on a Cisco IOS XR device with routing policy language. Which two statements about the routing policies are true? (Choose two.)

A. The routing policies affect BGP-related routes only.  
B. If you make edits to an existing routing policy without pasting the full policy into the CLI, the previous policy is overwritten.
C. You can change an existing routing policy by editing individual statements.  
D. The routing policies are implemented in a sequential manner.  
E. The routing policies are implemented using route maps.  

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Question # 13

Which task is performed when troubleshooting LDP? 

A. Execute the ping utility to generate information about the MAC addresses used along the path
B. Verify that MPLS is disabled globally and enabled on the necessary interfaces in a perinterface basis 
C. Execute the traceroute utility to generate information about the labels used along the path 
C. Execute the traceroute utility to generate information about the labels used along the path 

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Question # 14

What are three requirements for a static IPv6-in-IPv4 tunnel? (Choose three.) 

A. A static IPv6 address must be configured.  
B. A dynamic IPv6 address must be configured.  
C. Cisco Express Forwarding must be enabled.  
D. Each tunnel endpoint must support IPv4 and IPv6.  
E. A static IPv4 address must be configured.  
F. A dynamic IPv4 address must be configured.  

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Question # 15

Which two conditions must be met before separate ISPs can provide interdomain multicast routing? (Choose two.)

A. Each ISP must configure MSDP to connect its individual multicast administrative domain to the domains at other ISPs. 
B. Each ISP must dedicate a single router to handle multicast traffic between providers.  
C. Each ISP must replace its RP assignment with a global RP.  
D. Each ISP must configure its network to use PIM-DM.  
E. Each ISP must support intradomain multicast routing.  

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Question # 16

Which expression, when used with the as-path-set command, matches the AS path attribute of the route?

A. neighbor-is 
B. dfa-regtex
C. ios-regex
D. Length

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Question # 17

Which output from the show isis interface command helps an engineer troubleshoot an IS-IS adjacency problem on a Cisco IOS-XR platform?

A. metric 
B. priority
C. circuit type 
D. hello interval

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Question # 18

What is the difference between basic IS-IS and OSPF packet types? 

A. IS-IS and OSPF use area packets, but only IS-IS uses sequence number packets.  
B. IS-IS and OSPF use link-state update packets, but only OSPF uses link-state ACK packets.
C. IS-IS and OSPF use Hello packets, but only OSPF uses DBD packets.  
D. IS-IS and OSPF use link-state update packets, but only IS-IS uses DBD packets.  

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Question # 19

What is used by SR-TE to steer traffic through the network? 

A. shortest path calculated by IGP  
B. dynamic rules  
C. path policy  
D. explicit maps  

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Question # 20

Which statement about BFD on Cisco IOS XR Software is true? 

A. Cisco IOS XR router must use LDP to route back to the Cisco IOS router to establish the peer relationship. 
B. Cisco IOS XR Software does not support BFD multihop for IPv4.  
C. Cisco IOS XR router must use dynamic routing or a static route back to the Cisco IOS router to establish the peer relationship.
D. BFD is not compatible between Cisco IOS XR and Cisco IOS Software.  

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Question # 21

Which two routing protocols have extensions capable of running SRv6? (Choose two.) 

A. OSPF  
B. BGP  
C. RIP  
D. IGRP  
E. EIGRP  

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Question # 22

Which two statements about route reflectors are true? (Choose two.) 

A. Routes received from nonclient peers are reflected to route reflector clients as well as nonclient peers. 
B. Routes received from nonclient peers are reflected to route reflector cluster as well as OSPF peers
C. If a router received an iBGP route with the originator-ID attribute set to its own router ID, the route is discarded. 
D. Routes received from a route reflector client is reflected to other clients and nonclient peers. 
E. If a route reflector receives a route with a cluster-list attribute containing a different cluster ID, the route is discarded.

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Question # 23

Which statement about enabling segment routing for IGPs is true? 

A. Segment routing must first be enabled under then routing process and then globally  
B. Segment routing must first be enabled globally and then under the routing process  
C. Segment routing can be enabled only under the routing process  
D. Segment routing can be enabled only globally  

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Question # 24

What are two differences between OSPF and IS-IS? (Choose two.) 

A. OSPF is a link-state routing protocol, and IS-IS is a distance-vector routing protocol.  
B. OSPF uses a router ID to identify a router, and IS-IS uses a system ID.  
C. OSPF elects a DR and a BDR, and IS-IS elects a DIS.  
D. Unlike OSPF. IS-IS supports virtual links.  
E. Unlike IS-IS routers, an OSPF router belongs to only one area in addition to the backbone area.  

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Question # 25

What is the characteristic of enabling segment routing for IGPs? 

A. Segment routing must first be enabled under the routing process and then globally.  
B. Segment routing must first be enabled globally and then under the routing process.  
C. Segment routing must be enabled only globally.  
D. Segment routing must be enabled only under the routing process.  

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Question # 26

Which keyword is used with the match route-type command to redistribute the external BGP and IGP routes using route map? 

A. match route-type type-1  
B. match route-type nssa-external  
C. match route-type type-2  
D. match route-type external  

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Question # 27

What is the purpose of a BGP confederation? 

A. It limits the number of routes a device receives from its peers, which reduces CPU load.  
B. It improves service by increasing the number of simultaneous iBGP peering sessions.  
C. It redirects traffic away from route reflectors, which reduces their operating load.  
D. It reduces the number of iBGP peers and increases stability.  

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