Service Provider Routing and Switching Specialist Topic 1
Question #: 20
Topic #: 1
By default, which two statements are correct about switch ports on a Junos device? (Choose two.)
A. Trunk ports receive and transmit untagged traffic.
B. Access ports receive and transmit tagged traffic.
C. Trunk ports receive and transmit tagged traffic.
D. Access ports receive and transmit untagged traffic.
Selected Answer: CD
Question #: 19
Topic #: 1
What are two requirements for a unified in-service software upgrade? (Choose two.)
A. Bidirectional Forwarding Detection must be enabled on the device.
B. Nonstop active routing must be enabled on the device.
C. The device must have dual Routing Engines.
D. The device must be part of the chassis cluster.
Selected Answer: BC
Question #: 17
Topic #: 1
Which two steps are required to enable MPLS on a physical interface in Junos? (Choose two.)
A. Add family mpls on the interface.
B. Add the loopback interface under protocols mpls.
C. Add family mpls on the loopback interface.
D. Add the interface under protocols mpls.
Selected Answer: AD
Question #: 14
Topic #: 1
Which statement is true about the BGP active state?
A. The BGP active state is the initial state where all BGP traffic is refused.
B. The BGP active state is when BGP attempts to acquire a peer by initiating a TCP connection.
C. The BGP active state is when BGP waits for the TCP connection to be established.
D. The BGP active state is when BGP exchanges update, notification, and keepalive messages with its peer.
Selected Answer: B
Question #: 10
Topic #: 1
An OSPF router does not have a router ID configured.
In this scenario, which statement is correct about the router ID?
A. The Junos OS will use the IP address assigned to the interface with the lowest MAC address.
B. The Junos OS will use the IP address assigned to the loopback interface for the router ID.
C. A router ID will not be assigned until it is manually configured.
D. The Junos OS will use the IP address assigned to the interface with the highest priority.
Selected Answer: B
Question #: 9
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, what will happen to untagged frames?
A. The untagged frames are associated with VLAN 10.
B. The untagged frames are dropped.
C. The untagged frames are load balanced between VLAN 10 and VLAN 20.
D. The untagged frames are associated with VLAN 20.
Selected Answer: D
Question #: 6
Topic #: 1
How does a Junos device learn about MAC addresses when it is first connected to an Ethernet LAN?
A. The device sends out a network multicast message asking for all devices and MAC addresses on the network and stores this information in addition to the interface from which the response was received.
B. The device sends out a network broadcast message asking for all devices and MAC addresses on the network and stores this information in addition to the interface from which the response was received.
C. The device learns the destination MAC addresses from traffic in the network and stores this MAC address in addition to the interface from which the traffic was received.
D. The device learns the source MAC addresses from traffic in the network and stores this MAC address in addition to the interface from which the traffic was received.
Selected Answer: B
Question #: 5
Topic #: 1
Which BGP attribute is used to detect routing loops?
A. AS path
B. MED
C. local preference
D. next hop
Selected Answer: B
Question #: 4
Topic #: 1
What are two bridging concepts that are used to maintain an Ethernet switching table? (Choose two.)
A. learning
B. exporting
C. aging
D. timing
Selected Answer: D
Question #: 76
Topic #: 1
Click the Exhibit button.
The LSP is not establishing correctly.
Referring to the exhibit, what should you do to solve the problem?
A. Enable traffic engineering for the BGP protocol.
B. Enable traffic engineering for the RSVP protocol.
C. Enable traffic engineering for the OSPF protocol.
D. Enable traffic engineering for the IS-IS protocol.
Selected Answer: C
Question #: 38
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which statement is correct?
A. R1 will advertise only the 10.200.2.0/24 prefix to the 192.168.1.5 neighbor.
B. R1 will advertise only the 10.200.3.0/24 prefix to the 192.168.1.5 neighbor.
C. R1 will advertise the 10.200.1.0/24, 10.200.2.0/24, and 10.200.3.0/24 prefixes to the 192.168.1.5 neighbor.
D. R1 will advertise only the 10.200.1.0/24 prefix to the 192.168.1.5 neighbor.
Selected Answer: C
Question #: 87
Topic #: 1
Click the Exhibit button.
Which two statements are correct about the service provider MPLS network shown in the exhibit? (Choose two.)
A. R3 will perform a label pop operation on the transport MPLS label.
B. Traffic from Network 1 to Network 3 and from Network 1 to Network 4 can share the same label-switched path.
C. R3 will perform a label swap operation on the transport MPLS label.
D. Traffic from Network 1 to Network 3 and traffic from Network 1 to Network 4 each need their own unique label-switched path.
Selected Answer: BC
Question #: 41
Topic #: 1
Which BGP message type is used to re-advertise routes that have already been sent to a peer and acknowledged using TCP?
A. update
B. keepalive
C. notification
D. refresh
Selected Answer: A
Question #: 37
Topic #: 1
Click the Exhibit button.
All devices in the network are configured correctly and the path requirements are valid.
Referring to the exhibit, which two statements are correct? (Choose two.)
A. The primary LSP will be signaled, and its state will be up.
B. The secondary LSP will not be signaled, and its state will be down.
C. The secondary LSP will be signaled, and its state will be up.
D. The primary LSP will not be signaled, and its state will be down.
Selected Answer: AB
Question #: 33
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which statement is true about VRRP?
A. VRRP communication between the two devices is not functioning correctly.
B. Both routers are in the same state because they have the same VRRP priority.
C. VRRP is functioning normally in active/active mode.
D. The routers should use different virtual IP addresses for VRRP to function correctly.
Selected Answer: A
Question #: 90
Topic #: 1
What are two types of SIDs used in segment routing? (Choose two.)
A. node
B. link
C. interface
D. adjacency
Selected Answer: AD
Question #: 23
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, from which device(s) does R3 learn about Route X?
A. both R2 and R1
B. R1 only
C. directly from the router in AS 64502
D. R2 only
Selected Answer: B
Question #: 11
Topic #: 1
You are asked to configure filter-based forwarding on a Junos device.
Which two statements are correct in this scenario? (Choose two.)
A. You must create a routing policy.
B. You must create a route target.
C. You must create and apply a match filter.
D. You must create a routing instance.
Selected Answer: CD
Question #: 7
Topic #: 1
Which two statements are correct about IS-IS interface metrics? (Choose two.)
A. By default, an IS-IS interface has a maximum metric value of 1023.
B. Wide metrics enable IS-IS interface to have a maximum metric value of around 16 million.
C. Wide metrics enable an IS-IS interface to have a maximum metric value of 1023.
D. By default, an IS-IS interface has a maximum metric value of 63.
Selected Answer: BD
Question #: 12
Topic #: 1
You are implementing traffic engineering in your MPLS network. You must ensure that the MPLS routes are used to traverse your network. Your solution should not affect IGP routes in your route tables.
In this scenario, which traffic engineering setting will accomplish this behavior?
A. bgp-igp-both-ribs
B. mpls-forwarding
C. bgp-igp
D. bgp
Selected Answer: D
Question #: 18
Topic #: 1
Click the Exhibit button.
You configured an aggregated Ethernet bundle between R1 and R2. Unfortunately, the bundle is not working correctly.
Referring to the exhibit, which configuration change will solve this issue?
A. The LACP minimum links configuration should be changed to 2 on R1.
B. The LACP periodic mode should be changed to fast on R2.
C. The LACP mode should be changed to active on R1.
D. The LACP minimum links configuration should be changed to 1 on R2.
Selected Answer: C
Question #: 13
Topic #: 1
Click the Exhibit button.
Which two statements are correct about the information shown in the exhibit? (Choose two.)
A. The switch has a bridge priority of 8k.
B. This switch is the root bridge for this spanning tree topology.
C. The root bridge is reachable using the ge-0/0/14 interface.
D. The root bridge’s priority is 4k.
Selected Answer: AC
Question #: 68
Topic #: 1
Which two statements are correct about IS-IS? (Choose two.)
A. For level 2 adjacencies, the area IDs must be the same.
B. A level 1 only router can never form an adjacency with a level 2 only router.
C. A level 1 only router can form an adjacency with a level 2 only router.
D. For level 2 adjacencies, the area IDs can be different.
Selected Answer: BD
Question #: 8
Topic #: 1
Which two statements are correct about BGP? (Choose two.)
A. IBGP neighbors must use the same AS number.
B. By default, the TTL on product-related packets for external neighbors is set to 1.
C. EBGP neighbors must use the same AS number.
D. By default, the TTL on protocol-related packets for internal neighbors is set to 1.
Selected Answer: AB
Question #: 73
Topic #: 1
Click the Exhibit button.
Which type of load balancing is shown in the exhibit?
A. network load balancing
B. elastic load balancing
C. per-flow load balancing
D. per-packet load balancing
Selected Answer: C
Question #: 56
Topic #: 1
You are deploying an MC-LAG connection at the edge of your network to a new customer. This solution must ensure that traffic uses all available links when forwarding traffic between the two networks.
In this scenario, which two statements are correct? (Choose two.)
A. Transit traffic sent between the two PE devices will use the ICL interface.
B. You must use active/active mode when defining the MC-LAG bundle.
C. You must use active/standby mode when defining the MC-LAG bundle.
D. Transit traffic sent between the two PE devices will use the bundle’s member interfaces.
Selected Answer: B
Question #: 53
Topic #: 1
Click the Exhibit button.
You have an established LSP between your R1 and R5 devices using the configuration shown in the exhibit. You are asked to ensure that MPLS labels are used to forward traffic by all devices within the LSP.
Which action will accomplish this behavior?
A. Configure the ultimate-hop-popping statement under the R1_TO_R5 label switched path on R1.
B. Configure the explicit-null statement under the protocol mpls hierarchy on R1.
C. Configure the install statement under the R1_TO_R5 label switched path on R1.
D. Delete the no-cspf statement under the R1_TO_R5 label switched path on R1.
Selected Answer: A
Question #: 69
Topic #: 1
Which two ISA types are permitted in OSPF totally stubby areas? (Choose two.)
A. Type 3
B. Type 7
C. Type 5
D. Type 1
Selected Answer: C
Question #: 1
Topic #: 1
Click the Exhibit button.
You have configured graceful RE switchover (GRES), however you cannot complete the show system switchover command.
Referring to the exhibit, what is the problem?
A. The command is only available if a backup router is configured.
B. The command is only available if non-stop routing is enabled.
C. The command is only available if graceful restart is enabled.
D. The command is only available on the backup Routing Engine.
Selected Answer: B
Question #: 15
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, what is the minimum number of LSPs required to support all four networks?
A. 1
B. 2
C. 8
D. 4
Selected Answer: B
Question #: 78
Topic #: 1
Click the Exhibit button.
Which two statements are correct about the service provider MPLS network shown in the exhibit? (Choose two.)
A. R3 is considered a P router.
B. R3 is considered a transit router.
C. R3 is considered an ingress router.
D. R3 is considered a PE router.
Selected Answer: AB
Question #: 83
Topic #: 1
Click the Exhibit button.
Routers R1 and R4 have a VRRP priority of 90. while R2 and R3 have default VRRP priorities.
Referring to the exhibit, which router will be elected as the primary VRRP router?
A. R1
B. R2
C. R3
D. R4
Selected Answer: C
Question #: 74
Topic #: 1
Click the Exhibit button.
Referring to the exhibit. Internal BGP between R1 and R2 is not establishing.
What is the problem in this scenario?
A. R1 needs to be configured with an explicit router ID.
B. R1 and R2 must each have unique AS numbers.
C. R1 does not have a route to 192.168.200.2.
D. R1 needs to be configured with a next-hop self policy.
Selected Answer: B
Question #: 31
Topic #: 1
Which OSPF database packet determines which router is in charge of the database synchronization and the transferring of LSA headers between the two systems?
A. link-state request
B. database description
C. hello
D. link-state update
Selected Answer: B
Question #: 30
Topic #: 1
Click the Exhibit button.
The routers shown in the exhibit are configured for segment routing.
In this scenario, what is the adjacency SID that Router B advertises to Router A?
A. 11
B. 10.1.1.2
C. 10.1.1.1
D. 12
Selected Answer: D
Question #: 46
Topic #: 1
You want to see a detailed list of all established BGP sessions.
In this scenario, what would be a valid command to accomplish this task?
A. show bgp neighbor
B. show route receive-protocol bgp <neighbor IP address>
C. show route protocol bgp
D. show bgp summary
Selected Answer: A
Question #: 43
Topic #: 1
Click the Exhibit button.
You are advertising a summary route that represents your local network (172.20.0.0/16) to both ISP A and ISP B. You want to influence all traffic sent to you from ISP C to go through R2.
How would you accomplish this task?
A. On R2, change the local preference value to 50.
B. On R1, change the local preference value to 250.
C. On R1, prepend your AS number three times on the 172.20.0.0/16 route when advertising it to ISP 1.
D. On R2, prepend your AS number three times on the 172.20.0.0/16 route when advertising it to ISP 2.
Selected Answer: C
Question #: 72
Topic #: 1
Which two statements are correct when using LDP? (Choose two.)
A. The inet.3 table will contain a full mesh of label-switched paths to other LDP-enabled routers.
B. LDP label-switched paths are created by configuring LDP on at least one physical router interface.
C. LDP label-switched paths are created by configuring LDP on the loopback interface.
D. The inet.3 table will contain only the paths explicitly defined.
Selected Answer: AC
Question #: 29
Topic #: 1
Click the Exhibit button.
All devices in the network are configured correctly and the path requirements are valid.
Referring to the exhibit, which two statements are correct? (Choose two.)
A. The secondary LSP using the via-R2-R4 path will not be signaled, and its state will be down.
B. The secondary LSP using the any-path path will be signaled, and its state will be up.
C. The secondary LSP using the any-path path will not be signaled, and its state will be down.
D. The secondary LSP using the via-R2-R4 path will be signaled, and its state will be up.
Selected Answer: AC
Question #: 71
Topic #: 1
You are asked to create connections between routing instances on the same Junos device and route between the connected instances.
What are two ways to accomplish this task? (Choose two.)
A. Use loopback interfaces.
B. Use an IRB interface.
C. Use logical tunnel Interfaces.
D. Use physical interfaces.
Selected Answer: CD
Question #: 80
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two additional steps should you take to fully configure NSR? (Choose two.)
A. You should configure the max period for NSR precision timers.
B. You must configure graceful restart.
C. You should configure commit synchronization.
D. You must configure GRES.
Selected Answer: CD
Question #: 64
Topic #: 1
What is a key differentiator of generate routes from aggregate routes?
A. Generate routes cannot be used as a gateway of last resort.
B. Generate routes use a forwarding next hop.
C. Generate routes have a default next-hop value of reject.
D. Generate routes have a default preference value of 210.
Selected Answer: B
Question #: 24
Topic #: 1
Click the Exhibit button.
You confirm that the R2 and R3 routers are receiving a BGP route to the 203 0.113.0/24 network, but both routers display the route as hidden.
Referring to the exhibit, which two actions solve this problem? (Choose two.)
A. Apply the routing policy on R1 as an import policy to the IBGP group.
B. Configure a routing policy on R1 that sets the next hop for the 203 0.113.0/24 BGP route to the IP address that R1 uses for IBGP peering.
C. Configure a routing policy on R1 that sets the next hop for the 203.0.113.0/24 BGP route to the IP address that R1 uses for EBGP peering.
D. Apply the routing policy on R1 as an export policy to the IBGP group.
Selected Answer: BD
Question #: 21
Topic #: 1
You want to share routes between two routing instances that you have configured?
What are two ways to accomplish this task? (Choose two.)
A. Use a non-forwarding instance.
B. Configure an instance import policy
C. Create a forwarding instance.
D. Use a RIB group.
Selected Answer: BD
Question #: 52
Topic #: 1
Which two statements are correct about segment routing? (Choose two.)
A. Segment routing adjacencies require very little resources to maintain.
B. Label assignments can be advertised through OSPF updates.
C. There are no segment routing adjacencies to maintain.
D. Label assignments can be advertised through LDP updates.
Selected Answer: BC
Question #: 39
Topic #: 1
Interface ge-0/0/0.0 connects your network to your ISP. You want to advertise this interface address as an internal route in OSPF without creating a neighbor with your ISP.
In this scenario, how is this task accomplished?
A. Remove interface ge-0/0/0.0 from OSPF.
B. Add ge-0/0/0.0 as a passive interface in OSPF.
C. Create a generated route for interface ge-0/0/0.0.
D. Configure a static route for interface ge-0/0/0.0
Selected Answer: B
Question #: 36
Topic #: 1
Click the Exhibit button.
You are asked to configure OSPF between routers R1 and R2 using IPv6 addresses.
Which two tasks will accomplish your objective? (Choose two.)
A. Under the [edit routing-options] hierarchy, configure a 128-bit router ID.
B. Issue the set protocols ospf3 area 0.0.0.0 interface ge-0/0/1.0 command.
C. Issue the set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 command.
D. Under the [edit routing-options] hierarchy, configure a 32-bit router ID.
Selected Answer: BD
Question #: 86
Topic #: 1
You are asked to configure an ISP which uses the OSPF link state database for path computations.
Which two statements are correct in this scenario? (Choose two.)
A. Traffic engineering extensions are enabled by default in OSPF.
B. You must use the no-cspf parameter in the label-switched-path configuration.
C. You must use the policing parameter in the label-switched-path configuration.
D. Traffic engineering extensions are not enabled by default in OSPF.
Selected Answer: BD
Question #: 27
Topic #: 1
Which two interface types are used as tunnel endpoints? (Choose two.)
A. ge
B. ae
C. gr
D. ip
Selected Answer: B
Question #: 58
Topic #: 1
When would you use the qualified-next-hop statement with a static route?
A. You can use it to install the static route into different routing tables.
B. You can use it to send unwanted traffic to a null route.
C. You can use it to specify multiple next hops with different preferences.
D. You can use it to resolve the next hop if the next hop is not directly connected.
Selected Answer: C
Question #: 62
Topic #: 1
You are troubleshooting two OSPF routers that have an adjacency that remains in the ExStart state.
What would cause this problem?
A. mismatched OSPF hello intervals on the OSPF interfaces
B. mismatched authentication settings on the OSPF interfaces
C. mismatched MTU settings on the OSPF interfaces
D. mismatched subnet settings on the OSPF interfaces
Selected Answer: C
Question #: 82
Topic #: 1
Which two statements are correct about the way that BGP propagates routes by default? (Choose two.)
A. A route learned by EBGP will be re-advertised to IBGP peers.
B. A route learned by IBGP will not be re-advertised to IBGP peers.
C. A route learned by IBGP will be re-advertised to IBGP peers.
D. A route learned by EBGP will not be re-advertised to IBGP peers.
Selected Answer: AB
Question #: 48
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
A. Prefixes in Level 1 will be redistributed to Level 2.
B. Prefixes in Level 2 will be not redistributed to Level 1.
C. Prefixes in Level 1 will not be redistributed to Level 2.
D. Prefixes in Level 2 will be redistributed to Level 1.
Selected Answer: AB
Question #: 66
Topic #: 1
You are bringing a new network online with three IS-IS routers using default Junos election priorities. The routers are configured as Level 2 only IS-IS routers.
Which statement is true about the DIS election in this scenario?
A. The router with the highest numerical lo0 IP address will be elected as the DIS.
B. The router with the lowest MAC address will be elected as the DIS.
C. The router with the lowest numerical lo0 IP address will be elected as the DIS.
D. The router with the highest MAC address will be elected as the DIS.
Selected Answer: D
Question #: 3
Topic #: 1
What is the correct order of BGP attributes for active route selection?
A. next hop –> local preference –> AS path –> MED –> origin
B. next hop –> local preference –> AS path –> origin –> MED
C. next hop –> origin –> local preference –> AS path –> MED
D. next hop –> AS path –> local preference –> origin –> MED
Selected Answer: C
Question #: 88
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
A. The OSPF Interfaces are configured as point-to-point.
B. Junos OS default OSPF hello timers and dead intervals are used on all interfaces.
C. The R2 device is an ABR.
D. The ge-0/0/1.0 interface is configured as passive.
Selected Answer: BC
Question #: 70
Topic #: 1
Which two statements are correct about the BGP next-hop attribute value? (Choose two.)
A. By default, the next-hop value Is changed across EBGP links.
B. By default, the next-hop value Is not changed across IBGP links.
C. By default, the next-hop value Is not changed across EBGP links.
D. By default, the next-hop value is changed across IBGP links.
Selected Answer: AB
Question #: 85
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, where should next-hop-self-policy be applied to alter the next-hop value?
A. The policy is applied as an export policy for the group ext-64501.
B. The policy is applied as an import policy for the group ext-6450l.
C. The policy is applied as an import policy for the group int-64503.
D. The policy is applied as an export policy for the group int-64503.
Selected Answer: D
Question #: 67
Topic #: 1
Which new field is added to an IPv6 header as compared to IPv4?
A. flow label
B. checksum
C. fragment offset
D. version
Selected Answer: A
Question #: 16
Topic #: 1
Which two protocols are capable of distributing labels for segment routing? (Choose two.)
A. RSVP
B. LDP
C. IS-IS
D. OSPF
Selected Answer: CD
Question #: 59
Topic #: 1
You are bringing a new network online with three MX Series devices enabled for STP. No root bridge priority has been configured.
Which statement is true in this scenario?
A. The device with the lowest MAC address will be elected as the root bridge.
B. The device with the lowest numerical lo0 IP address will be elected as the root bridge.
C. The device with the highest MAC address will be elected as the root bridge.
D. The device with the highest numerical lo0 IP address will be elected as the bridge.
Selected Answer: A
Question #: 60
Topic #: 1
Which two statements are correct about the behavior of IS-IS metrics? (Choose two.)
A. Wide metrics enable interfaces to advertise metrics larger than 63.
B. By default, the metric of an interface is calculated based on the speed of the interface.
C. Wide metrics enable an interface to advertise different metrics at Level 1 and Level 2.
D. By default, all physical interfaces have a metric of 10.
Selected Answer: AD
Question #: 57
Topic #: 1
What are three types of MPLS routers? (Choose three.)
A. transit routers
B. egress routers
C. peering routers
D. aggregation routers
E. ingress routers
Selected Answer: ABE
Question #: 35
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, what does the configuration achieve on the ge-0/0/3 interface?
A. This interface will assign itself an IPV6 address within this prefix, based on a 64-bit hash of the loopback IPv6 address.
B. This interface will send a request to a DHCP server, requesting an EUI-64 address in this prefix.
C. This interface will assign itself an IPv6 address within this prefix, based on its MAC address.
D. This interface will send a request to an EUI server, requesting a 64-bit interface address within this 64-bit prefix.
Selected Answer: B
Question #: 2
Topic #: 1
What are three well-known mandatory BGP attributes? (Choose three.)
A. MED
B. origin
C. community
D. AS path
E. next hop
Selected Answer: D
Question #: 25
Topic #: 1
Click the Exhibit button.
Referring to the exhibit, you have an established RSVP LSP between R1 and R4 when you experience a link failure between R2 and R3.
Which two statements are correct? (Choose two.)
A. R2 sends a ResvTear message upstream to R1 signaling the link failure.
B. R3 sends a PathTear message downstream to R4 signaling the link failure.
C. R2 sends a PathTear message upstream to R1 signaling the link failure.
D. R3 sends a ResvTear message downstream to R4 signaling the link failure.
Selected Answer: C
