Service Provider Routing and Switching Professional Topic 1
Question #: 42
Topic #: 1
Which two statements are correct about reflecting inet-vpn unicast prefixes in BGP route reflection? (Choose two.)
A. Clients add their originator ID when advertising routes to their route reflector.
B. Route reflectors add their cluster ID to the AS path when readvertising client routes.
C. Route reflectors do not change any existing BGP attributes by default when advertising routes.
D. A BGP peer does not require any configuration changes to become a route reflector client.
Selected Answer: B
Question #: 96
Topic #: 1
Click the Exhibit button.
Which two statements are correct about the class-of-service configuration shown in the exhibit? (Choose two.)
A. The drop probability jumps immediately from 20% to 60% when the queue level reaches 75% full.
B. To use this drop profile, you reference it in a scheduler.
C. The drop probability gradually increases from 20% to 60% as the queue level increases from 50% full to 75% full.
D. To use this drop profile, you apply it directly to an interface.
Selected Answer: D
Question #: 90
Topic #: 1
Which two statements are correct regarding bootstrap messages that are forwarded within a PIM sparse mode domain? (Choose two.)
A. Bootstrap messages distribute RP information dynamically during an RP election.
B. Bootstrap messages are used to notify which router is the PIM RP.
C. Bootstrap messages are forwarded only to routers that explicitly requested the messages within the PIM sparse-mode domain.
D. Bootstrap messages are forwarded to all routers within a PIM sparse-mode domain.
Selected Answer: D
Question #: 91
Topic #: 1
You must alter class-of-service values in packets on the outbound interface of an edge router.
In this scenario, which CoS component allows you to accomplish this task?
A. output policer
B. scheduler
C. rewrite rules
D. forwarding classes
Selected Answer: C
Question #: 70
Topic #: 1
You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network.
In this scenario, which statement is correct?
A. You must use the same route-distinguisher value on both PE devices.
B. You must assign a unique site number to each attached site’s configuration.
C. This type of VPN only supports Ethernet interfaces when connecting to CE devices.
D. This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices.
Selected Answer: B
Question #: 55
Topic #: 1
Your network is receiving the 203.0.113.0/24 network using EBGP from AS 64500 and AS 64501. Both of these advertisements have identical local-preference values, AS-path lengths, and BGP origin codes. You want to influence the way your AS sends traffic to the 203.0.113.0/24 network.
In this scenario, which attribute would you consider next when selecting the best path?
A. router ID
B. MED value
C. peer IP address
D. IGP metric
Selected Answer: A
Question #: 54
Topic #: 1
Click the Exhibit button.
Which two statements are correct about the class-of-service configuration shown in the exhibit? (Choose two.)
A. Incoming traffic will be classified using the default classifier.
B. The best-effort queue can never transmit more than 40% of the total bandwidth on the ge-0/0/0 interface, even if that bandwidth is available.
C. Incoming traffic will not be classified because no classifier exists in the configuration.
D. The best-effort queue can transmit more than 40% of the total bandwidth on the ge-0/0/0 interface, if no other queue is using that bandwidth.
Selected Answer: AD
Question #: 39
Topic #: 1
Click the Exhibit button.
You have MAC addresses moving in your EVPN environment.
Referring to the exhibit, which two statements are correct about the sequence number? (Choose two.)
A. It identifies MAC addresses that should be discarded.
B. It resolves conflicting MAC address ownership claims.
C. It is advertised using a Type 2 message.
D. It helps the local PE to identify the latest advertisement.
Selected Answer: CD
Question #: 36
Topic #: 1
Click the Exhibit button.
After adding Customer C to your Layer 3 VPN. you must ensure that PE2 is receiving VPN routes for all customers attached to PE1, as shown in the exhibit.
Which operational command displays this information?
A. show route table inet.0
B. show route table bgp.l3vpn.0
C. show route table customer-c.inet.0
D. show route summary
Selected Answer: B
Question #: 29
Topic #: 1
Click the Exhibit button.
You are asked to exchange routes between R1 and R4 as shown in the exhibit. These two routers use the same AS number.
Which two steps will accomplish this task? (Choose two.)
A. Configure the BGP group with the advertise-peer-as parameter on R2 and R3.
B. Configure the BGP group with the as-override parameter on R1 and R4.
C. Configure the BGP group with the advertise-peer-as parameter on R1 and R4.
D. Configure the BGP group with the as-override parameter on R2 and R3.
Selected Answer: AD
Question #: 26
Topic #: 1
You are configuring schedulers to define the class-of-service properties of output queues. You want to control packet drops during periods of congestion.
In this scenario, which CoS configuration parameter would be used to accomplish this task?
A. buffer size
B. priority
C. shaping rate
D. drop profile
Selected Answer: D
Question #: 16
Topic #: 1
An interface is configured with a behavior aggregate classifier and a multifield classifier.
How will the packet be processed when received on this interface?
A. The packet will be processed by the MF classifier first, then the BA classifier.
B. The packet will be processed by the BA classifier first, then the MF classifier.
C. The packet will be discarded.
D. The packet will be forwarded with no classification changes.
Selected Answer: B
Question #: 40
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, you must provide VRF Internet access over a single connection for VPN-A Site 1, which connects to PE-1.
Which two statements are correct in this scenario? (Choose two.)
A. You must use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.
B. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.
C. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.
D. You do not need to use the RIB group default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.
Selected Answer: D
Question #: 14
Topic #: 1
Click the Exhibit button.
R4 is directly connected to both RPs (R2 and R3). R4 is currently sending all joins upstream to R3 but you want all joins to go to R2 instead.
Referring to the exhibit, which configuration change will solve this issue?
A. Change the bootstrap priority on R2 to be higher than R3.
B. Change the local address on R2 to be higher than R3.
C. Change the default route in inet.2 on R4 from R3 as the next hop to R2.
D. Change the group-range to be more specific on R2 than R3.
Selected Answer: D
Question #: 84
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, what do the brackets [ ] in the AS path identify?
A. They identify that the autonomous system number is incomplete and awaiting more information from the BGP protocol.
B. They identify that a BGP confederation is being used to ensure that there are no routing loops.
C. They identify an AS set. which are groups of AS numbers in which the order does not matter.
D. They identify the local AS number associated with the AS path if configured on the router, or if AS path prepending is configured.
Selected Answer: D
Question #: 65
Topic #: 1
Click the Exhibit button.
You are attempting to summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500. You implement the export policy shown in the exhibit and all routes from the routing table stop being advertised.
In this scenario, which two steps would you take to summarize the route in BGP? (Choose two.)
A. Replace exact in the export policy with orlonger.
B. Remove the from protocol bgp command from the export policy.
C. Add the set protocols bgp family inet unicast add-path command to allow additional routes to the RIB tables.
D. Add the set routing-options aggregate route 203.0.113.128/25 command.
Selected Answer: AD
Question #: 61
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which statement is correct?
A. VPN routes are exported with the target:65512:1 and target:65512:2 route targets.
B. You cannot use the vrf-target and vrf-export statements in the same VRF.
C. VPN routes with the target:65512:1 and target:65512:2 route targets are imported.
D. VPN routes are exported with only the target:65512:1 route target
Selected Answer: B
Question #: 60
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are correct about the dual route reflectors within a cluster? (Choose two.)
A. RR1 and RR2 must have the same duster ID to exchange routes learned from the client.
B. RR1 and RR2 append the duster ID when advertising routes from dient to dient.
C. RR1 and RR2 advertise routes learned from the clients to EBGP peers, using itself as the next hop.
D. RR1 advertises routes from the client to RR2. using itself as the next hop.
Selected Answer: BC
Question #: 49
Topic #: 1
Which two statements about IS-IS are correct? (Choose two.)
A. CSNPs are used to request a missing LSP.
B. PSNPs are used to acknowledge a received LSP.
C. PSNPs are used to request a missing LSP.
D. CSNPs are used to acknowledge a received LSP.
Selected Answer: D
Question #: 47
Topic #: 1
Click the Exhibit button.
You have an OSPF environment. You have recently added a router called R4 that is directly connected to R1 and R2. You discover that R4 is only peering with R2.
Referring to the exhibit, how would you correct the peering?
A. Adjust the Hello Interval on R1 and R2 to match the Hello Interval on R4.
B. Change the MTU size on R1 and R2 to be 22 bytes higher than R4’s MTU size.
C. Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2.
D. Adjust the Priority on R1 to be lower than the Priority on R4.
Selected Answer: D
Question #: 44
Topic #: 1
Which two statements describe PIM-SM? (Choose two.)
A. Routers without receivers must periodically prune themselves from the SPT.
B. Traffic is only forwarded to routers that request to join the distribution tree.
C. Traffic is initially flooded to all routers and an S,G is maintained for each group.
D. Routers with receivers send join messages to their upstream neighbors.
Selected Answer: A
Question #: 35
Topic #: 1
Click the Exhibit button.
R1 and R8 are not receiving each other’s routes.
Referring to the exhibit, what are three configuration commands that would solve this problem? (Choose three.)
A. Configure remove-private on advertisements from AS 64497 toward AS 64498.
B. Configure as-override on advertisement from AS 64500 toward AS 64512.
C. Configure remove-private on advertisements from AS 64500 toward AS 64499.
D. Configure loops and advertise-peer-as on routers in AS 64497 and AS 64450.
E. Configure loops on routers in AS 65412 and advertise-peer-as on routers in AS 64498.
Selected Answer: ABC
Question #: 34
Topic #: 1
You have an L2VPN connecting two CEs across a provider network that runs OSPF. You have OSPF configured on both CEs.
Which two statements are correct in this scenario? (Choose two.)
A. OSPF neighborship is formed between the CEs and PEs.
B. OSPF neighborship is formed between the two CEs.
C. The CE and PE OSPF areas must match.
D. The CE and PE OSPF areas can be different.
Selected Answer: B
Question #: 27
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are correct about BGP routes on R3 that are advertised to R1? (Choose two.)
A. By default, the next-hop value for these routes is not changed by R3 before being sent to R1.
B. By default, the next-hop value for these routes is changed by R3 before being sent to R1.
C. By default, the BGP local-preference value that is assigned on R3 is advertised to R1.
D. By default, all BGP attributes values must be removed before advertising the routes to R1.
Selected Answer: C
Question #: 15
Topic #: 1
Which two statements are correct regarding the PIM DR in a PIM-SM domain? (Choose two.)
A. By default. PIM DR election is performed on point-to-point links.
B. If the DR priorities match, the router with the lowest IP address is selected as the DR.
C. The source DR sends PIM register messages from the source network to the RP.
D. The receiver DR sends PIM join and PIM prune messages from the receiver network toward the RP.
Selected Answer: C
Question #: 11
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are true? (Choose two.)
A. The multihop configuration is used for load balancing.
B. This route is learned from the same AS number.
C. This route is learned from two different AS numbers.
D. The multipath configuration is used for load balancing.
Selected Answer: C
Question #: 6
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are true? (Choose two.)
A. The devices advertising this route into EVPN are 10.0.2.12 and 10.0.2.22.
B. This route is learned through EBGP.
C. The device advertising this route into EVPN is 192.168.101.5.
D. This is an EVPN Type-2 route.
Selected Answer: CD
Question #: 5
Topic #: 1
Which two statements are correct about VPLS tunnels? (Choose two.)
A. BGP-signaled VPLS tunnels require manual provisioning of sites.
B. LDP-signaled VPLS tunnels only support control bit 0.
C. LDP-signaled VPLS tunnels use auto-discovery to provision sites.
D. BGP-signaled VPLS tunnels can use either RSVP or LDP between the PE routers.
Selected Answer: BD
Question #: 2
Topic #: 1
Click the Exhibit button.
You are troubleshooting the connection between AS 64496 and AS 64497 and notice that only one of the paths is being used for traffic forwarding.
Referring to the exhibit, which three actions will ensure that R1 is configured properly for load balancing BGP routes? (Choose three.)
A. Verify that the routing table on R1 has BGP routes for 203.0.113.128/25 with multiple next hops.
B. Verify that the multipath option is configured under protocols bgp on both R2 and R3.
C. Verify that there is a load balancing export policy under routing-options for the received BGP routes on R1.
D. Verify that the multipath option is configured under protocols bgp on R1.
E. Verify that an import load balancing policy exists under protocols bgp for the received BGP routes on R1.
Selected Answer: ACD
Question #: 93
Topic #: 1
Click the Exhibit button.
Which two statements about the configuration shown in the exhibit are correct? (Choose two.)
A. This VPN connects customer sites that use the same AS number.
B. This VPN connects customer sites that use different AS numbers.
C. A Layer 3 VPN is configured.
D. A Layer 2 VPN is configured.
Selected Answer: BC
Question #: 51
Topic #: 1
In IS-IS. which two statements are correct about the designated intermediate system (DIS) on a multi-access network segment? (Choose two.)
A. On the multi-access network, each router forms an adjacency to every other router on the segment.
B. On the multi-access network, each router only forms an adjacency to the DIS.
C. A router with a priority of 1 wins the DIS election over a router with a priority of 10.
D. A router with a priority of 10 wins the DIS election over a router with a priority of 1.
Selected Answer: A
Question #: 50
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which three statements are correct about route 10.0.0.0/16 when using the default BGP advertisement rules? (Choose three.)
A. R2 will advertise 10.0.0.0/16 to R4 with 172.16.1.1 as the next hop.
B. R2 will advertise 10.0.0.0/16 to R3 with 192.168.1.1 as the next hop.
C. R1 will advertise 10.0.0.0/16 to R2 with 192.168.1.1 as the next hop.
D. R1 will prepend AS 65531 when advertising 10.0.0.0/16 to R2.
E. R4 will advertise 10.0.0.0/16 to R6 with 172.16.1.1 as the next hop.
Selected Answer: ACE
Question #: 3
Topic #: 1
After a recent power outage, your manager asks you to investigate ways to automatically reduce the impact caused by suboptimal routing in your OSPF and OSPFv3 network after devices reboot.
Which three configuration statements accomplish this task? (Choose three.)
A. set protocols ospf3 realm ipv4-unicast overload timeout 900
B. set protocols ospf overload
C. set protocols ospf overload timeout 900
D. set protocols ospf3 overload
E. set protocols ospf3 overload timeout 900
Selected Answer: ACE
Question #: 1
Topic #: 1
Click the Exhibit button.
R2 is receiving the same route from R1 and R3. You must ensure that you can load balance traffic for that route.
Referring to the exhibit, which configuration change will allow load balancing?
A. Configure the multipath parameter under the global BGP configuration.
B. Apply the prepend policy as an import policy under group R1.
C. Configure the multipath multiple-as parameter under the global BGP configuration.
D. Apply the prepend policy as an import policy under group R3.
Selected Answer: A
Question #: 66
Topic #: 1
Which statement is true regarding BGP FlowSpec?
A. It is used to protect a network from denial-of-service attacks dynamically.
B. It uses dynamically created routing policies to protect a network from denial-of-service attacks.
C. It uses a remote triggered black hole to protect a network from a denial-of-service attack.
D. It verifies that the source IP of the incoming packet has a resolvable route in the routing table.
Selected Answer: D
Question #: 95
Topic #: 1
Click the Exhibit button.
You want Site 1 to access three VLANs that are located in Site 2 and Site 3. The customer-facing interface on the PE-1 router is configured for Ethernet-VLAN encapsulation.
What is the minimum number of L2VPN routing instances to be configured to accomplish this task?
A. 1
B. 2
C. 3
D. 6
Selected Answer: B
Question #: 71
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, you are receiving the 192.168.0.0/16 route on both R3 and R4 from your EBGP neighbor. You must ensure that R1 and R2 receive both BGP routes from the route reflector.
In this scenario, which BGP feature should you configure to accomplish this behavior?
A. add-path
B. route-target
C. multipath
D. multihop
Selected Answer: D
Question #: 12
Topic #: 1
A packet is received on an interface configured with transmission scheduling. One of the configured queues is exceeding the allocated bandwidth.
In this scenario, which two actions will be taken by default on a Junos device? (Choose two.)
A. The exceeding queue will be considered to have negative bandwidth credit.
B. The excess traffic will be discarded.
C. The exceeding queue will be considered to have positive bandwidth credit.
D. The excess traffic will use bandwidth available from other queues.
Selected Answer: AD
Question #: 86
Topic #: 1
Click the Exhibit button.
The network shown in the exhibit is based on IS-IS.
Which statement is correct in this scenario?
A. The routers are using unnumbered interfaces.
B. The system ID of R1_2 is 192.168.16.1.
C. The NSEL byte for Area 0001 is 00.
D. The area address is two bytes.
Selected Answer: C
Question #: 85
Topic #: 1
Your organization manages a Layer 3 VPN for multiple customers. To support advanced route filtering on your PE routers, you must advertise more than one BGP community on advertised VPN routes to remote PE routers.
Which routing-instance configuration parameter would support this requirement?
A. vrf-target import
B. vrf-export
C. vrf-target export
D. vrf-import
Selected Answer: B
Question #: 79
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, you must provide Internet access for VPN-A using CE-1 as the hub CE.
Which two statements are correct in this situation? (Choose two.)
A. Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> GW-1.
B. Internet traffic from Site 2 takes the path of PE-2 -> PE-1 -> CE-1 -> PE-1 -> GW-1.
C. You must use RIB groups to leak routes between the inet.0 and VPN-A.inet.0 tables.
D. RIB groups are not needed to leak routes between the inet.0 and VPN-A.inet.0 tables.
Selected Answer: BD
Question #: 94
Topic #: 1
Click the Exhibit button.
Based on the configuration contents shown in the exhibit, which statement is true?
A. Joins for group 224.7.7.7 are rejected if the source address is 192.168.100.10.
B. Joins for group 224.7.7.7 are always rejected, regardless of the group count.
C. Joins for group 224.7.7.7 are accepted if the group count is less than 25.
D. Joins for any group are accepted if the group count value is less than 25.
Selected Answer: A
Question #: 76
Topic #: 1
Click the Exhibit button.
Which two statements about the output shown in the exhibit are correct? (Choose two.)
A. The connection has not flapped since it was initiated.
B. The PE is attached to a single local site.
C. There has been a VLAN ID mismatch.
D. The PE router has the capability to pop flow labels.
Selected Answer: B
Question #: 69
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are correct about BGP routes on R3 that are learned from the ISP-A neighbor? (Choose two.)
A. The next-hop value for these routes Is changed by ISP-A before being sent to R3.
B. All BGP attribute values must be removed before receiving the routes.
C. The BGP local-preference value that is used by ISP-A is not advertised to R3.
D. By default, the next-hop value for these routes is not changed by ISP-A before being sent to R3.
Selected Answer: AC
Question #: 59
Topic #: 1
Click the Exhibit button.
Referring to the exhibit. PE-1 and PE-2 are getting route updates for VPN-B when neither of them service that VPN.
Which two actions would optimize this process? (Choose two.)
A. Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement on the PEs.
B. Configure the family route-target statement on the RR.
C. Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement on the RR.
D. Configure the family route-target statement on the PEs.
Selected Answer: BC
Question #: 52
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, a working L3VPN exists that connects VPN-A sites. CoS is configured correctly to match on the MPLS EXP bits of the LSP. but when traffic is sent from Site-1 to Site-2. PE-2 is not classifying the traffic correctly.
What should you do to solve the problem?
A. Configure VPN prefix mapping for the PE-1_to_PE-2 LSP.
B. Set a static CoS value for the PE-1_to_PE-2 LSP.
C. Configure the explicit-null statement on PE-2.
D. Configure the explicit-null statement on PE-1.
Selected Answer: C
Question #: 48
Topic #: 1
What is the correct order of packet flow through configurable components in the Junos OS CoS features?
A. Multifield Classifier -> Behavior Aggregate Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Rewrite Marker -> Scheduler/Shaper/RED
B. Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker
C. Behavior Aggregate Classifier -> Input Policer -> Multifield Classifier -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker
D. Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Scheduler/Shaper/RED -> Output Policer -> Rewrite Marker
Selected Answer: B
Question #: 63
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, the PE-to-CE protocol being used is OSPF for the L3VPN. Also, there is an OSPF neighborship between CE-1 and CE-2.
Which statement is correct in this situation?
A. You must set a high metric on the CE-1 to PE-1 link for hosts at Site-1 to use the CE-1 to CE-2 link to reach hosts at Site-2.
B. You must set a high metric on the CE-1 to CE-2 link for hosts at Site-1 to use the L3VPN to reach hosts at Site-2.
C. Hosts at Site-1 will reach hosts at Site-2 through the CE-1 and CE-2 link by default.
D. Hosts at Site-1 will reach hosts at Site-2 through the L3VPN by default.
Selected Answer: C
Question #: 57
Topic #: 1
You have an L2VPN connecting two CEs across a provider network. The CEs and provider network are configured with the default MTU setting. You use the ping command from one CE to the other CE with a size of 1500 bytes.
In this scenario, which statement is correct when using the ping command?
A. You expect an ICMP message too long error.
B. You expect an echo reply.
C. You expect a silent discard.
D. You expect the ping results to be fragmented.
Selected Answer: C
Question #: 38
Topic #: 1
Click the Exhibit button.
You have an EVI implemented between PE-1, PE-2, and PE-3 to allow communication between CE-1 and CE-2. CE-2 receives unicast traffic from CE-1 on both links to PE-2 and PE-3. When CE-1 sends broadcast traffic. CE-2 receives it on only one of the multihomed links.
Referring to the exhibit, which EVPN route type enables this behavior?
A. Type 2
B. Type 4
C. Type 1
D. Type 3
Selected Answer: B
Question #: 33
Topic #: 1
Which statement is correct about IS-IS when it performs the Dijkstra algorithm?
A. The local router moves its own local tuples into the candidate database.
B. When a new neighbor ID in the tree database matches a router ID in the LSDthe neighbor ID is moved to the candidate database.
C. Tuples with the lowest cost are moved from the tree database to the LSDB.
D. The algorithm will stop processing once the tree database is empty.
Selected Answer: B
Question #: 73
Topic #: 1
You want to ensure that L1 IS-IS routers have only the most specific routes available from L2 IS-IS routers.
Which action accomplishes this task?
A. Configure the ignore-attached-bit parameter on all L1 routers.
B. Configure all routers to be L1.
C. Configure all routers to allow wide metrics.
D. Configure the ignore-attached-bit parameter on all L2 routers.
Selected Answer: D
Question #: 87
Topic #: 1
Which two statements are correct about IS-IS interfaces? (Choose two.)
A. If a point-to-point interface is in both L1 and L2, separate hello messages are sent for each level.
B. If a point-to-point interface is in both 11 and L2, one combined hello message is sent for both levels.
C. If a broadcast interface is in both L1 and L2, separate hello messages are sent for each level.
D. If a broadcast interface is in both L1 and L2, one combined hello message is sent for both levels.
Selected Answer: BC
Question #: 32
Topic #: 1
Which two statements about IS-IS are correct? (Choose two.)
A. CSNPs are flooded periodically.
B. PSNPs are flooded periodically.
C. PSNPs contain only descriptions of LSPs.
D. CSNPs contain only descriptions of LSPs.
Selected Answer: AC
Question #: 82
Topic #: 1
Click the Exhibit button.
Referring to the exhibit. PIM-SM is configured on all routers, and Anycast-RP with Anycast-PIM is used for the discovery mechanism on RP1 and RP2. The interface metric values are shown for the OSPF area.
In this scenario, which two statements are correct about which RP is used? (Choose two.)
A. Source2 will use RP1 and Receiver2 will use RP1 for group 224.2.2.2.
B. Source2 will use RP2 and Receiver2 will use RP2 for group 224.2.2.2.
C. Source1 will use RP1 and Receiver1 will use RP1 for group 224.1.1.1.
D. Source1 will use RP1 and Receiver1 will use RP2 for group 224.1.1.1.
Selected Answer: BD
Question #: 7
Topic #: 1
Click the Exhibit button.
You are running a service provider network and must transport a customer’s IPv6 traffic across your IPv4-based MPLS network using BGP. You have already configured mpls ipv6-tunneling on your PE routers.
Which two statements are correct about the BGP configuration in this scenario? (Choose two.)
A. You must configure family inet6 labeled-unicast between PE routers.
B. You must configure family inet6 add-path between PE and CE routers.
C. You must configure family inet6 unicast between PE and CE routers.
D. You must configure family inet6 unicast between PE routers.
Selected Answer: AC
Question #: 31
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are correct regarding the output shown in the exhibit? (Choose two.)
A. The multicast group is an ASM group.
B. The multicast group is an SSM group.
C. The multicast traffic is using the SPT.
D. The multicast traffic is using the RPT.
Selected Answer: BC
Question #: 58
Topic #: 1
Click the Exhibit button.
You want to implement the BGP Generalized TTL Security Mechanism (GTSM) on the network.
Which three statements are correct in this scenario? (Choose three.)
A. BGP GTSM requires a TTL of 1 to be configured between neighbors.
B. You can implement BGP GTSM between R2, R3, and R4.
C. You can implement BGP GTSM between R2 and R1.
D. BGP GTSM requires a firewall filter to discard packets with incorrect TTL.
E. BGP GTSM requires a TTL of 255 to be configured between neighbors
Selected Answer: CDE
Question #: 22
Topic #: 1
Click the Exhibit button.
You want to use both links between R1 and R2. Because of the bandwidth difference between the two links, you must ensure that the links are used as much as possible.
Which action will accomplish this goal?
A. Ensure that the metric-out parameter on the Gigabit Ethernet interface is higher than the 10 Gigibit Ethernet interface.
B. Define a policy to tag routes with the appropriate bandwidth community.
C. Enable per-prefix load balancing.
D. Disable multipath.
Selected Answer: B
Question #: 4
Topic #: 1
You are configuring anycast RP for load balancing and redundancy in your PIM-SM domain. You want to share active sources between RPs.
In this scenario, what are two solutions that will accomplish this task? (Choose two.)
A. Configure MSDP on each RP router.
B. Configure anycast PIM with the rp-set statement on each RP router.
C. Configure anycast PIM with the rp-set statement on each source DR router.
D. Configure MSDP on each source DR router.
Selected Answer: AB
Question #: 19
Topic #: 1
Click the Exhibit button.
You are examining an L3VPN route that includes the information shown in the exhibit.
Which statement is correct in this scenario?
A. The information shows a route target.
B. The information shows a Type 1 route distinguisher.
C. The information shows a Type 0 route distinguisher.
D. The information shows a Type 2 route distinguisher.
Selected Answer: B
Question #: 53
Topic #: 1
Which origin code is preferred by BGP?
A. Internal
B. External
C. Incomplete
D. Null
Selected Answer: A
Question #: 23
Topic #: 1
Which two statements are correct about the customer interface in an LDP-signaled pseudowire? (Choose two.)
A. When the encapsulation is vlan-ccc or extended-vlan-ccc, the configured VLAN tag is included in the control plane LDP advertisement.
B. When the encapsulation is ethernet-ccc, tagged and untagged frames are both accepted in the data plane.
C. When the encapsulation is ethernet-ccc, only frames without a VLAN tag are accepted in the data plane.
D. When the encapsulation is vlan-ccc or extended-vlan-ccc, the configured VLAN tag is not included in the control plane LDP advertisement.
Selected Answer: AB
Question #: 28
Topic #: 1
You want to ensure that a single-area OSPF network will be loop free.
In this scenario, what are two requirements that satisfy this requirement? (Choose two.)
A. The DR/BDR ensures that each node within an area has the same information in their LSDBs.
B. The Shortest Path First algorithm must prune looped paths.
C. Nodes within an area must connect in a full mesh.
D. All nodes within an area must have the same information in their LSDBs.
Selected Answer: BD
Question #: 20
Topic #: 1
Click the Exhibit button.
CE-1 and CE-2 are part of a VPLS called Customer1. No connectivity exists between CE-1 and CE-2. In the process of troubleshooting, you notice PE-1 is not learning any routes for this VPLS from PE-2, and PE-2 is not learning any routes for this VPLS from PE-1.
Referring to the exhibit, which statement is correct?
A. The route target must match on PE-1 and PE-2.
B. The instance type should be changed to l2vpn.
C. The no-tunnel-services statement should be deleted on both PEs.
D. The route distinguisher must match on PE-1 and PE-2.
Selected Answer: A
Question #: 18
Topic #: 1
You are responding to an RFP for a new MPLS VPN implementation. The solution must use LDP for signaling and support Layer 2 connectivity without using BGP. The solution must be scalable and support multiple VPN connections over a single MPLS LSP. The customer wants to maintain all routing for their private network.
In this scenario, which solution do you propose?
A. circuit cross-connect
B. BGP Layer 2 VPN
C. LDP Layer 2 circuit
D. translational cross-connect
Selected Answer: C
Question #: 24
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, CE-1 is providing NAT services for the hosts at Site 1 and you must provide Internet access for those hosts.
Which two statements are correct in this scenario? (Choose two.)
A. You must configure a static route in the main routing instance for the 203.0.113.1/32 prefix that uses the VPN-A.inet.0 table as the next hop.
B. You must configure a static route in the main routing instance for the 10.1.2.0/24 prefix that uses the VPN-A.inet.0 table as the next hop.
C. You must configure a RIB group on PE-1 to leak a default route from the inet.0 table to the VPN-A.inet.0 table.
D. You must configure a RIB group on PE-1 to leak the 10.1.2.0/24 prefix from the VPN-A.inet.0 table to the inet.0 table.
Selected Answer: AC
Question #: 21
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which path would traffic passing through R1 take to get to R4?
A. R1 -> R3 -> R4
B. R1 -> R2 -> R3 -> R4
C. R1 -> R2 -> R4
D. R1 -> R4
Selected Answer: C
Question #: 17
Topic #: 1
You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. Your PE-2 device connects to two sites within the same VPN.
In this scenario, which statement is correct?
A. You must create a unique Layer 2 VPN routing instance for each site on the PE-2 device.
B. By default on PE-2, the site’s local ID is automatically assigned a value of 0 and must be configured to match the total number of attached sites.
C. You must use separate physical interfaces to connect PE-2 to each site.
D. By default on PE-2, the remote site IDs are automatically assigned based on the order that you add the interfaces to the site configuration.
Selected Answer: D
Question #: 13
Topic #: 1
Which two statements are correct about a sham link? (Choose two.)
A. The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes.
B. It creates an OSPF multihop neighborship between two PE routers.
C. It creates a BGP multihop neighborship between two PE routers.
D. The PEs exchange Type 3 OSPF LSAs instead of Type 1 OSPF LSAs for the L3VPN routes.
Selected Answer: AB
Question #: 10
Topic #: 1
You are configuring a Layer 3 VPN between two sites. You are configuring the vrf-target target: 65100:100 statement in your routing instance.
In this scenario, which two statements describe the vrf-target configuration? (Choose two.)
A. This value is used to identify BGP routes learned from the remote PE device.
B. This value is used to add a target community to BGP routes advertised to the local CE device.
C. This value is used to add a target community to BGP routes advertised to the remote PE device.
D. This value is used to identify BGP routes learned from the local CE device.
Selected Answer: AC
Question #: 9
Topic #: 1
You are a network architect for a service provider and want to offer Layer 2 services to your customers. You want to use EVPN for Layer 2 services in your existing MPLS network.
Which two statements are correct in this scenario? (Choose two.)
A. Segment routing must be configured on all PE routers.
B. EVPN uses Type 2 routes to advertise MAC address and IP address pairs learned using ARP snooping.
C. EVPN uses Type 3 routes to join a multicast tree to flood traffic.
D. VXLAN must be configured on all PE routers.
Selected Answer: BC
Question #: 8
Topic #: 1
When using 0SPFv3 for an IPv4 environment, which statement is correct?
A. OSPFv3 only supports IPv4.
B. OSPFv3 is not backward compatible with IPv4.
C. OSPFv3 supports both IPv6 and IPv4, but not in the same routing instance.
D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined.
Selected Answer: D
