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  • 更新された2024年07月テストエンジン練習4A0-115問題集と練習試験合格させます [Q10-Q35]

更新された2024年07月テストエンジン練習4A0-115問題集と練習試験合格させます [Q10-Q35]

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更新された2024年07月テストエンジン練習4A0-115問題集と練習試験合格させます

問題集お試しセット4A0-115テストエンジンで問題集トレーニングには40問あります

質問 # 10
Examine the exhibit.

Which of the following statements about the operation of VPLS 20 is TRUE?

  • A. PE3 advertises an IMET route to PEI when its VPLS 20's mesh-SDP becomes operationally UP.
  • B. PE3 signals a service label to PE4 when its VPLS 20 is enabled and is bound to an operational SDP.
  • C. The flooding list maintained by PEI for VPLS 20 contains three entries: PE2, PE3, and PE4.
  • D. PEI advertises a MAC route for MAC-OI when its VPLS 2(Ys SAP becomes operationally UP.

正解：D

解説：
Explanation
PE1 does not advertise a MAC route for MAC-01 when its VPLS 20's SAP becomes operationally UP. PE1 advertises an EVPN MAC/IP route for MAC-01, which includes the IP address of Host 1 and the ESI of the Ethernet segment1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 11
Which of the following statements about an EVPN with integrated routing and bridging (EVPN-IRB) service is FALSE?

  • A. This service requires the use of EVPN-MPLS for data plane.
  • B. This service consists of a VPRN and multiple VPLSs.
  • C. This service enables the use of EVPN to provide connectivity between hosts in different subnets.
  • D. In this service, the IRB interface acts as a default gateway for hosts in the corresponding subnet.

正解：A

解説：
Explanation
EVPN with integrated routing and bridging (EVPN-IRB) service does not require the use of EVPN-MPLS for data plane. EVPN-IRB service can use either EVPN-MPLS or EVPN-VXLAN for data plane.


質問 # 12
In the exhibit, the EVPN-IRB is configured to use the interface-ful unnumbered model. Which of the following statements regarding the route advertisement is FALSE?

  • A. PE3 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE4. The BGP update includes an MPLS service label.
  • B. PEI advertises an EVPN MAC route for MAC-OI to PE3. The BGP update includes the route-target value configured for VPRN 15.
  • C. PE4 advertises an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE2. The BGP update includes MAC-04 as an overlay index.
  • D. PEI advertises an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE3. The BGP update includes MAC-OI as on overlay index.

正解：C

解説：
Explanation
PE4 does not advertise an EVPN IP-Prefix route for prefix 10.10.1.0/24 to PE2. PE4 advertises a VPN-IPv4 route for prefix 10.10.1.0/24 to PE2, which includes the MPLS service label of VPRN 152.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia


質問 # 13
Which of the following statements about EVPN auto-discovery per Ethernet segment (A-D per ES) routes is TRUE?

  • A. The updates include an MPLS label that is set to a non-zero value.
  • B. The updates advertise the Ethernet segment availability in a given EVPN service.
  • C. The updates include an Ethernet tag ID that is set to zero.
  • D. The updates include an Ethernet segment identifier label that is used in loop prevention.

正解：C

解説：
Explanation
EVPN auto-discovery per Ethernet segment (A-D per ES) routes do not include an Ethernet tag ID that is set to zero. The Ethernet tag ID is set to a non-zero value that identifies the EVPN service instance1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 14
Which of the following statements about EVPN auto-discovery per EVPN instance (A-D per EVI) routes is FALSE?

  • A. The updates are used to discover all the PES associated with an Ethernet segment.
  • B. The updates include an Ethernet tag ID that is set to zero.
  • C. A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.
  • D. A PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.

正解：D

解説：
Explanation
A PE does not advertise an A-D per EVI route for each operational service defined on an Ethernet segment. A PE advertises a single A-D per EVI route for all services defined on an Ethernet segment.


質問 # 15
Based upon the exhibit,

which of the following statements about the forwarding of BUM traffic is FALSE?

  • A. PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.
  • B. PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.
  • C. PE3 replicates the traffic and sends it to all PES in its VPLS I flooding list.
  • D. PE2 decapsulates the packets received from PE3 and forwards the frames to CE2.

正解：A

解説：
Explanation
PE3 does not add an ESI label to packets forwarded to PE1 because PE1 is connected to the same Ethernet segment. PE3 adds an ESI label only to packets forwarded to PEs that are not connected to the same Ethernet segment, such as PE21.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 16
Examine the exhibit.

Which of the following statements about the EVPN routes exchanged for EVPN VPWS 2 is TRUE?

  • A. PEI advertises an A-D per EVI route that includes a tag ID set to 40.
  • B. PEI advertises an A-D per EVI route that includes a non-zero Layer-2 MTLJ.
  • C. All PES advertise a MAC route that includes a non-zero MPLS label.
  • D. PE2 advertises an A-D per EVI route that includes a P flag set to I.

正解：C

解説：
Explanation
All PEs do not advertise a MAC route that includes a non-zero MPLS label. Only PE1 advertises a MAC route that includes a non-zero MPLS label, which is used by PE2 to forward traffic to PE1. PE2 and PE3 do not advertise any MAC routes for VPWS 21.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 17
Which of the following statements about the EVPN Layer 2 Attributes extended community is FALSE?

  • A. It is applicable to EVPN VPLS services.
  • B. It specifies a P flag that indicates whether the advertising PE is a primary PE.
  • C. It specifies the service maximum transmission unit (MTU).
  • D. It is advertised with the auto-discovery per EVPN instance (A-D per EVI) route.

正解：A

解説：
Explanation
The EVPN Layer 2 Attributes extended community is not applicable to EVPN VPLS services. It is applicable to EVPN VPWS services, where it carries information such as the tag ID and the service MTU1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 18
Examine the exhibit.

Which of the following actions is performed by PEI after it receives a BUM packet from CEI?

  • A. PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.
  • B. PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
  • C. PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
  • D. PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.

正解：C

解説：
Explanation
PE1 sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2. The ESI label is used to implement the split-horizon mechanism and prevent traffic duplication. The packet sent to PE3 does not need an ESI label because PE3 is connected to the same Ethernet segment as PE1.


質問 # 19
Based upon the exhibit, how many MAC-VRFs are there?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

正解：D

解説：
Explanation
There are two MAC-VRFs in the exhibit, one for each EVI. A MAC-VRF is a logical entity that contains the MAC forwarding information for a given EVI1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 20
Which of the following statements about the EVPN route types used to support multi-homing is TRUE?

  • A. Auto-discovery (A-D) routes are imported by all PES participating in the EVPN service.
  • B. Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.
  • C. ES routes provide the ESI label required to support the split-horizon mechanism.
  • D. A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.

正解：B

解説：
Explanation
Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment. The redundancy mode can be either single-active or all-active, and it determines how traffic is forwarded to and from a multi-homed CE1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 21
Which of the following statements about EVPN Layer-3 services that utilize the interface-ful model is TRUE?

  • A. VPRN instances are interconnected using a supplementary broadcast domain (SBD) VPLS.
  • B. EVPN MAC/IP routes are used to advertise the IP prefixes of subnets attached to a VPRN.
  • C. Intra-subnet traffic is carried over the tunnels provided by the SBD VPLS.
  • D. The MAC/IP routing information is used to populate the VPRN routing table at the remote PEs.

正解：C

解説：
Explanation
In the interface-ful model, VPRN instances are interconnected using a supplementary broadcast domain (SBD) VPLS. Intra-subnet traffic is carried over the tunnels provided by the SBD VPLS. The MAC/IP routing information is not used to populate the VPRN routing table at the remote PEs, but rather to populate the FDB of the SBD VPLS2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia


質問 # 22
What are EVPN inclusive multicast Ethernet tag (IMET) routes used for?

  • A. To discover all PES attached to the same Ethernet segment
  • B. To advertise the redundancy mode of a local Ethernet segment
  • C. To discover all PES participating in the same VPIS service
  • D. To advertise the MAC or MAC/IP addresses of locally-learned hosts

正解：C

解説：
Explanation
EVPN inclusive multicast Ethernet tag (IMET) routes are used to discover all PEs participating in the same VPIS service. These routes are also used to build the flooding list for BUM traffic.


質問 # 23
Examine the exhibit.

Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?

  • A. The remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.
  • B. The local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.
  • C. The local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.
  • D. The local AC tag ID and the remote AC tag ID configured on PE2 must match.

正解：B

解説：
Explanation
The local AC tag ID configured on PE2 must match the local AC tag ID configured on PE1. This ensures that the tag IDs are consistent across both ends of the VPWS service. The remote AC tag ID configured on PE2 does not need to match the remote AC tag ID configured on PE3, as long as they are unique within each PE1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 24
Which of the following statements about PE-to-PE MAC address advertisement is FALSE?

  • A. A PE advertises locally-learned MAC addresses to remote PES using EVPN type-2 routes.
  • B. A PE uses a single MP-BGP session with a remote peer to exchange the routes for all EVIs.
  • C. The service distinguisher (label or VNI) is advertised with the MAC/IP EVPN update.
  • D. Route targets are used to uniquely identify routes between EVIS in the case of MAC address overlaps.

正解：D

解説：
Explanation
Route targets are not used to uniquely identify routes between EVIs in the case of MAC address overlaps.
Route targets are used to control the import and export of routes between different EVIs or VRFs. The service distinguisher (label or VNI) is used to uniquely identify each service1.
Verified References: Ethernet Virtual Private Networks (EVPNs)


質問 # 25
Based on the exhibit below, which of the following statements is FALSE?

  • A. The MPLS label 524284 presented indicates the service label value that the neighbor 10.10.10.2 uses to forward BUM traffic to PEI.
  • B. The IMET route is imported by a local VPLS configured with a route-target value of 65100:10.
  • C. When forwarding BUM traffic, the local PE uses an MPLS transport tunnel towards the advertising neighbor.
  • D. When forwarding BUM traffic, the local PE must replicate the traffic and send it as unicast to the advertising neighbor.

正解：D

解説：
Explanation
When forwarding BUM traffic, the local PE does not replicate the traffic and send it as unicast to the advertising neighbor. Instead, the local PE uses an MPLS transport tunnel towards the advertising neighbor and sends the traffic with an MPLS label that indicates the service.


質問 # 26
......

Nokia 4A0-115問題集カバー率リアル試験問題：https://www.passtest.jp/Nokia/4A0-115-shiken.html

リアル4A0-115問題集でNokia問題集PDF：https://drive.google.com/open?id=1FYa4hEp3rk477xYE6AvUwb_YKA8pCXb7

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