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1 / 60

Refer to the exhibit. After you applied these configurations to routers R1 and R2, the two devices could not form a neighbor relationship. Which reason for the problem is the most likely?

The two routers have the same network ID

The two routers have different IS-types

The two routers have the same area ID

The two routers cannot authenticate with one another

2 / 60

An engineer wants to map a multicast IP address to a multicast MAC. How many bits are used to make the conversion?

Igher-order 23 bits

Igh-order 24 bits

Ower-order 24 bits

Ow-order 23 bits

3 / 60

Which difference must an engineer consider when implementing inter-domain and intra-domain multicast routing on the network?

Ntra-domain routing is dependent on the RP router within the same SP network, but inter-domain routing reduces the dependency on the other SP network

Nter-domain routing supports policy routing to connect different multicast domains using PIM-SM, but intra-domain routing supports policy routing using PIM-SM only within a single domain

Ntra-domain routing allows the service provider to control incoming and outgoing multicast data streams on its network, but inter-domain routing limits the service provider's control

Ntra-domain routing uses the PIM and MBGP protocols for multicast routing, but inter-domain routing

4 / 60

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

The receiver explicitly requests traffic from a single source, which responds by forwarding all traffic

The RP on the shared tree floods traffic out of all PIM configured interfaces

The receiver explicitly requests traffic from each desired source, which responds by sending all traffic

The receiver explicitly requests its desired traffic from the RP on the shared tree

5 / 60

For which reason can two BGP peers fail to establish a neighbor relationship?

Their remote-as numbers are misconfigured

They are both activated under an IPv4 address family

Their BGP timers are mismatched

Their BGP send-community strings are misconfigured

6 / 60

Refer to the exhibit. After troubleshooting BGP traffic steering issue, which action did the network operator take to achieve the correct effect of this configuration?

Routes directly attached to AS 65517 have the local preference set to 150

Routes that have passed through AS 65517 have the local preference set to 150 and the traffic is denied

Routes that have originated through AS 65517 have the local preference set to 150

Routes that have passed through AS 65517 have the local preference set to 150

7 / 60

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

DR support for topology management

routing process enabled by default on all interfaces

hierarchical CLI

show ip ospf topology command

8 / 60

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

Circuit type

Hello interval

Metric

Priority

9 / 60

Refer to the exhibit. P1 and PE3 Cisco IOS XR routers are directly connected and have this configuration applied. The BGP session is not coming up. Assume that there is no IP reachability problem and both routers can open tcp port 179 to each other. Which two actions fix the issue? (Choose two.)

Change MD5 to HMAC-SHA1-12, Change MD5 to HMAC-MD5

Change MD5 to HMAC-ESP, Change MD5 to SHA-1

Change MD5 to SHA-1, Remove the send and accept lifetime under key 1

Remove the send and accept lifetime under key 1, Change MD5 to SHA-1

Change MD5 to HMAC-MD5, Change MD5 to HMAC-ESP

10 / 60

Refer to the exhibit. Which router does R1 install as an alternate next hop when trying to reach R3 if LFA is enabled?

11 / 60

Refer to the exhibit. Router 1 has attempted to establish a Cisco MPLS TE tunnel to router 2, but the tunnel has failed. Which statement about this configuration is true?

Router 1 must have Cisco MPLS TE enabled on interface gigabitethernet0/1

Router 2 must have a tunnel interface created with router 1 as the destination

Router 1 must define an explicit path to router 2

Router 1 and router 2 must define the RSVP bandwidth reserved on the physical interfaces

12 / 60

Which command is used to enable BIDIR-PIM under global configuration mode for Cisco IOS XE Sofware?

ip pim bidir

ipv4 pim bidir-enable

ip multicast-routing

ip pim bidir-enable

13 / 60

Refer to the exhibit. Which statement about this configuration is true?

Router 1 receives only the best path from neighbor 192.168.1.1

Router 1 receives up to two paths from neighbor 192.168.1.1 for all routes in the same AS

Router 1 sends up to two paths to neighbor 192.168.1.1 for all routes

Router 1 sends and receives multiple best paths from neighbor 192.168.1.1

14 / 60

Refer to the exhibit. An engineer is troubleshooting an OSPF issue. Router 1 has a neighbor relationship with router 2. Only router 1 classful EIGRP routes can be seen on router 2. In order for all EIGRP routes to be redistributed correctly, which action should be taken?

Router 1 must have the keyword ospf-metric included in the redistribution command for all EIGRP routes to be redistributed

Router 1 must remove the AS number 1 from the redistribution command for all EIGRP routes to be redistributed

Router 1 must have the keyword subnets included in the redistribution command for all EIGRP routes to be redistributed

Router 1 must have the keyword metric-type 1 included in the redistribution command for all EIGRP routes to be redistributed

15 / 60

Refer to the exhibit. CE1 and CE2 cannot communicate through the service provider BGP peering is established between PE1 and PE2. IS-IS is the only routing protocol running in the service provider core. What step can be done to troubleshoot the issue?

Confirm that IS-IS is running with metric-style narrow

Verify the MPLS LSPs

Configure BGP between CE and PE routers

Switch the IGPs running in the core from IS-IS to OSPF to support a Cisco MPLS TE tunnel from PE1 to PE2

16 / 60

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

Infinite

Automatic

17 / 60

Refer to the exhibit. Which task must you perform on interface g1/0/0 to complete the SSM implementation?

configure IGMPv3

disable IGMP

configure OSPFv3

enable CDP

18 / 60

After you change the IP address on an IOS XR router, you cannot ping the new address.
Which step did you forget to complete?

Roll back the configuration

Merge the configuration

Commit the configuration

Save the running configuration

19 / 60

Refer to the exhibit. How are packets directed through the data plane when SRv6 is implemented?

A stack of labels represents an ordered list of segments

The packet is encapsulated with a header and trailer encoding the ordered list of segments

The MPLS data plane is used to push labels onto IGP routes

An ordered list of segments is encoded in a routing extension header

20 / 60

Refer to the exhibit. An engineer is addressing an IS-IS design issue which is running within the topology. All links are running on FastEthernet, except the link between R5 and R4, which is Gigabit Ethernet. Which statement about the design is true?

R5 prefers to use R4 as the next hop for all routes

R1 prefer to use R5 as the next hop to reach R4

R4 prefer to reach R5 using R1 as the next hop

All links have equal cost if the default metric is used

21 / 60

Refer to the exhibit. A service provider technician is working on a multicast issue for a customer. While checking the multicast table, the technician notices that no flags are present for the (1.1.1.1, 239.1.1.1) entry, yet flags are present for the (1.1.1.1, 232.1.1.1) entry.
Which factor might explain this issue?

Only the default SSM range is permitted

Only GLOP is permitted

Only the administratively scoped range is permitted

Only ASM is permitted

22 / 60

Which feature is used in multicast routing to prevent loops?

RPF

Split horizon

STP

Inverse ARP

23 / 60

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

To reduce the number of iBGP peering sessions

To reduce the number of eBGP routes that must be shared between autonomous systems

To support a larger number of eBGP peer sessions

To increase the number of routes that can be redistributed between the running IGP and BGP

24 / 60

Refer to the exhibit. Why is neighbor 10.1.5.5 stuck in "2WAY" state?

It is an expected behavior when OSPF network type is broadcast

OSPF parameters (Area ID or hello interval) are mismatched between R2 and 10.1.5.5

Router ID 10.1.5.5 is not reachable from R2

OSPF authentication has failed between R2 and 10.1.5.5

25 / 60

You have configured MSDP peering between two autonomous systems that pass traffic between two sites, but the peering has failed to come up.
Which task do you perform to begin troubleshooting the problem?

Verify that multicast has been disabled globally

Verify that PIM-DM is configured on the source interface

Verify that the two MSDP peers allow asymmetric routing

Verify that both source interfaces are reachable from both peers

26 / 60

An engineer is troubleshooting a connectivity issue across the MPLS network and is verifying the forwarding behavior of packets. Which table does the engineer look at to verify the forwarding behavior of an IP packet as it enters the MPLS network at the ingress LSR?

FIB

LIB

RIB

LFIB

27 / 60

Refer to the exhibit. R1 is directly connected to R2 and R3. R1 is in BGP AS 123, R2 is in BGP AS 2, and R3 is in BGP AS 3. Assume that there is no connectivity issue between R1, R2 and R1, R3. Which result between BGP peers R1, R2 and R1, R3 is true?

The BGP session does not come up between R1 and R2 and between R1 and R3

The BGP session comes up between R1 and R2, but not between R1 and R3

The BGP session comes up between R1 and R2 and between R1 and R3

The BGP session comes up between R1 and R3, but not between R1 and R2

28 / 60

Refer to the exhibit. Router 1 has established an SR-TE tunnel with router 2. Which statement describes this configuration?

Router 1 is the head-end tunnel and has dynamically chosen a path to router 2

Router 2 is the head-end tunnel and has explicitly set a path to router 1

Router 1 and router 2 have a bidirectional tunnel set up with dynamic path selection

Router 1 has a list of labels used to explicitly lay out a path to router 2

29 / 60

Refer to the exhibit. Router 1 is a core ABR in a Cisco Unified MPLS environment. All of the router 1 BGP peers are established, but traffic between customers is failing. Which BGP configuration must be added to the configuration?

It must be configured for graceful restart

It must be configured with send labels

It must be configured with PIC edge

It must be configured with a route reflector

30 / 60

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?

SNMP server

Path computation engine

Tail-end router

Traffic controller

31 / 60

Refer to the exhibit. Which LSA type is indicated by this router output?

type 1 LSA

type 2 LSA

type 3 LSA

type 4 LSA

32 / 60

Refer to the exhibit. Router 1 is connected to router 2 on interface TenGigE0/1. Which interface provides the alternate path to 172.16.200.9/32 when the link between router 1 and router 2 goes down?

TenGigE0/2 interface provides the alternate path

A primary path must be manually installed

A backup path must be statically installed

Refer to the exhibit. Router 1 is connected to router 2 on interface TenGigE0/1. Which interface provides the alternate path to 172.16.200.9/32 when the link between router 1 and router 2 goes down?

33 / 60

Which statement about enabling segment routing for IGPs is true?

Segment routing can be enabled only globally

Segment routing can be enabled only under the routing process

Segment routing must first be enabled under then routing process and then globally

Segment routing must first be enabled globally and then under the routing process

34 / 60

Which task is performed when troubleshooting LDP?

Execute the traceroute utility to generate information about the labels used along the path

Verify that Cisco Express Forwarding has been disabled on the network

Verify that MPLS is disabled globally and enabled on the necessary interfaces in a per-interface basis

Execute the ping utility to generate information about the MAC addresses used along the path

35 / 60

Refer to the exhibit. After troubleshooting an OSPF adjacency issue, routers 1, 2, and 3 have formed OSPF neighbor relationships. Which statement about the configuration is true?

Router 2 uses router 1 as the next hop for 192.168.0.0/24

Router 2 receives a Type 7 LSAs from router 3 for its connected subnets Correct

Router 2 uses router 3 as the next hop for 192.168.0.0/24

Router 2 receives a Type 5 LSAs from router 1 for its connected subnets

36 / 60

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?

The interface mode ip router is-is command was not included in the script

The configured IS-IS NSEL value is not allowing the routing systems to establish a neighborship

The IS-IS "ISP" and "ISP2" instances are unrelated and unable to intercommunicate

The same interface cannot be advertised in two different IS-IS instances

37 / 60

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

Path policy

Explicit maps

Shortest path calculated by IGP

Dynamic rules

38 / 60

For which reason can two devices fail to establish an OSPF neighbor relationship?

The two devices have the same area ID

The two devices have different router IDs

The two devices have different process IDs

The two devices have different network types

39 / 60

Refer to the exhibit. A network operator is working to filter routes from being advertised that are covered under an aggregate announcement. The receiving router of the aggregate announcement block is still getting some of the more specific routes plus the aggregate. Which configuration change ensures that only the aggregate is announced now and in the future if other networks are to be added?

Set each specific route in the AGGRO policy to remove instead of suppress-route

Filter the routes on the receiving router

Set each specific route in the AGGRO policy to drop instead of suppress-route

Configure the summary-only keyword on the aggregate command

40 / 60

Refer to the exhibit. A network operator is getting the route for 10.11.11 0/24 from two upstream providers on #XR3. The network operator must configure #XR3 to force the 10.11.11.0/24 prefix to route via next hop of 10.0.0.9 as primary when available. Which of these can the operator use the routing policy language for, to enforce this traffic forwarding path?

Weight of 100 on the prefix coming from 192.168.0.1

Lower local preference on the prefix coming from 192.168.0.2

Higher local preference on the prefix coming from 192.168.0.1

Weight of 0 on the prefix coming from 192.168.0.2

41 / 60

Refer to the exhibit. Which effect of this configuration is true?

It sets the hold timer to 30 seconds and the keepalive timer to 240 seconds

It sets the hold timer to 30 milliseconds and the keepalive timer to 240 milliseconds

It sets the keepalive timer to 30 milliseconds and the hold timer to 240 milliseconds

It sets the keepalive timer to 30 seconds and the hold timer to 240 seconds

42 / 60

Refer to the exhibit. Which tree does multicast traffic follow?

MDT voice

Shared tree

Source tree

MDT default

43 / 60

An ISP has an MPLS VPN-based network with 12 PE routers. How many peerings are required between the 12 routers if the engineer has not configured route reflectors?

44 / 60

What is a requirement of PIM-SM?

t requires OSPF to be configured on the network

t must be enabled on loopback interfaces only

t requires Cisco Express Forwarding to be enabled

t must use an RP

45 / 60

What is a characteristic of a segment routing mapping server?

t must be placed in the core of the network

t serves multiple VRFs

t applies SID mappings from one IGP instance to another IGP instance

t must have an IGP adjacency

46 / 60

Which feature provides service independence in service provider networks?

Refix SID that contains router hops toward the destination

Djacency SID that represents a path between the routers

Ode SID that identifies the network device

Inding SID that is used to stitch different domains

47 / 60

Which IPv6 prefix format defines the destination of a dynamic 6to4 tunnel?

e80::/10

f00::/8

001:db8::/32

002::/16

48 / 60

Which technique should be permitted on ASA Firewall to allow MSDP Peering?

DP socket(s) carrying MSDP messages

IMv2 messages carrying MSDP messages

Ulticast BGP carrying MSDP messages

CP socket(s) carrying MSDP messages

49 / 60

The operator must leverage automated steering and coloring with the design. Which two elements from an SR Policy tuple are used for automated steering inside of the network? (Choose two.)

Eadend, M paths

M paths, Andidate labels

Ndpoint, Olor

Andidate labels, M paths

Olor, Eadend

50 / 60

Which tag command is used within route-map to redistribute routes that match with routes tagged with the specified tag numbers?

Atch route tag

Atch all tag

Atch routing tag

Atch tag

51 / 60

When deploying a nationwide network of routers, what is the benefit of using BGP confederations?

Automatability

Security

Availability

Scalability

52 / 60

Which type of encapsulation does Segment Routing v6 (SRv6) use?

GRE encapsulation

IPv6 encapsulation

IPv4 encapsulation

MPLS encapsulation

53 / 60

Which component is responsible for calculating the optimal path for traffic flows in PCE-based path calculation?

MPLS labels

Link state routing protocols

Segment routing headers

Centralized controller (PCE)

54 / 60

How are constraints, metrics, and attributes used in Segment Routing Traffic Engineering?

To establish RSVP-TE tunnels

To enable link state routing protocols

To configure MPLS label distribution

To define policies for traffic steering and path calculation

55 / 60

What is the purpose of traffic steering in route manipulation?

To redistribute traffic among multiple paths to optimize network performance

To filter routes based on specific criteria

To control the flow of traffic within the network

To manipulate the cost or metrics of routes

56 / 60

Which routing protocol supports traffic engineering and traffic steering capabilities?

BGP

OSPF

EIGRP

IS-IS

57 / 60

How can route filtering be implemented in BGP?

All of the above

Using prefix lists or access control lists (ACLs)

Using AS_PATH manipulation techniques

Using route maps or regular expressions

58 / 60

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

Cisco IOS XR router must use dynamic routing or a static route back to the Cisco IOS router to establish the peer relationship

BFD is not compatible between Cisco IOS XR and Cisco IOS Software

Cisco IOS XR Software does not support BFD multihop for IPv4

Cisco IOS XR router must use LDP to route back to the Cisco IOS router to establish the peer relationship

59 / 60

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

OSPF, BGP

BGP, EIGRP

RIP, IGRP

IGRP, OSPF

EIGRP, BGP

60 / 60

Which two characteristics unique to SSM when compared to ASM are true? (Choose two.)

It uses SPT switchover, It uses (*,G) exclusively

It uses (*,G) exclusively, It uses RP

It uses IGMPv3, It uses (S,G) exclusively

It uses RP, It uses (S,G) exclusively

It uses (S,G) exclusively, It uses SPT switchover

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