[2023年更新]合格できるNokia 4A0-115プレミアム資料テストエンジンPDFの無料問題集お試しセット
2023年最新のリアル4A0-115問題集テストエンジン試験問題はここにある
Nokia 4A0-115 認定試験の出題範囲：
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質問 # 12
Which of the following EVPN routes are exchanged to support the operation of a multi-homed EVPN VPWS?
- A. A-D per EVI routes and ES routes only
- B. Auto-discovery per EVPN instance (A-D per EVI) routes and Auto-discovery per Ethernet segment (A-D per ES) routes only
- C. A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes
- D. MAC/IP routes, A-D per EVI routes, and A-D per ES routes
正解：C
解説：
Explanation
A-D per EVI routes, A-D per ES routes, and Ethernet segment (ES) routes are exchanged to support the operation of a multi-homed EVPN VPWS. These routes are used to discover all PEs associated with an Ethernet segment, indicate the redundancy mode of the Ethernet segment, and elect the designated forwarder for each service.
質問 # 13
Based on the exhibit below, which of the following statements is FALSE?
- A. The IMET route is imported by a local VPLS configured with a route-target value of 65100:10.
- B. When forwarding BUM traffic, the local PE must replicate the traffic and send it as unicast to the advertising neighbor.
- C. When forwarding BUM traffic, the local PE uses an MPLS transport tunnel towards the advertising neighbor.
- D. The MPLS label 524284 presented indicates the service label value that the neighbor 10.10.10.2 uses to forward BUM traffic to PEI.
正解：B
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 # 14
In the exhibit, an EVI range is configured and the preference-based algorithm is used to elect the designated forwarder (DF) on ESI 1. Which PE is elected as DF for VPLS 10?
- A. PEI
- B. PE2
- C. PE3
- D. PE4
正解：C
解説：
Explanation
PE3 is elected as DF for VPLS 10. The preference-based algorithm uses the highest preference value of the PEs attached to the same Ethernet segment as the tie-breaker criterion. PE3 has the highest preference value among PE1, PE2, and PE3.
質問 # 15
Which of the following statements about EVPN auto-discovery per Ethernet segment (A-D per ES) routes is TRUE?
- A. The updates include an Ethernet segment identifier label that is used in loop prevention.
- B. The updates include an MPLS label that is set to a non-zero value.
- C. The updates include an Ethernet tag ID that is set to zero.
- D. The updates advertise the Ethernet segment availability in a given EVPN service.
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 # 16
Based on the exhibit below, which of the following statements is TRUE?
- A. PEI uses this BGP update to build the flooding list of the associated service.
- B. PE2 advertises this BGP update for a locally-configured VPWS service.
- C. PEI uses MPLS label 524284 when sending traffic destined to
- D. Neighbor 10.10.10.2 is connected to a multi-homed CE.
正解：A
解説：
Explanation
PE1 uses this BGP update to build the flooding list of the associated service. The update contains an IMET route that indicates that neighbor 10.10.10.2 is participating in a VPLS service with a network identifier of 10.
質問 # 17
In the exhibit, the interface-less forwarding model is used for the Layer-3 EVPN service. Which of the following statements about traffic forwarding from Host 1 to Host 2 is FALSE?
- A. PEI encapsulates the packet with two labels: an outer transport label and an inner service label.
- B. PE2 inspects the service label and determines that it is associated with RVPLS 2.
- C. PE2 consults the FDB of RVPLS 2 and forwards the traffic to Host 2.
- D. PEI consults the FDB of RVPLS 1 and forwards the traffic to the local interface of VPRN 11.
正解：A
解説：
Explanation
PE1 does not encapsulate the packet with two labels: an outer transport label and an inner service label. PE1 encapsulates the packet with three labels: an outer transport label, a service label associated with VPRN 11, and a service label associated with RVPLS 11.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 18
Which of the following statements about the EVPN Layer 2 Attributes extended community is FALSE?
- A. It specifies a P flag that indicates whether the advertising PE is a primary PE.
- B. It specifies the service maximum transmission unit (MTU).
- C. It is applicable to EVPN VPLS services.
- D. It is advertised with the auto-discovery per EVPN instance (A-D per EVI) route.
正解：C
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 # 19
Examine the exhibit.
Which of the following configuration is NOT required to enable Layer-2 communication between CEI and CE2?
- A. Configure a service distribution point (SDP) on PE3 to reach PE4, and another SDP on PE4 to reach PE3.
- B. Configure an MP-BGP session that allows the exchange of IPv4 labeled routes between PE3 and PE4.
- C. Configure an MP-BGP session that allows the exchange of EVPN routes between PEI and PE3.
- D. Configure a local attachment circuit (AC) and a remote AC for VPWS 4 on all PE routers.
正解：A
解説：
Explanation
The advertisement of IP-Prefix routes is not required to enable Layer-2 communication between CE1 and CE2. IP-Prefix routes are used to enable Layer-3 communication between different subnets in an EVPN-IRB service. For Layer-2 communication, only MAC/IP routes are required2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 20
Which of the following statements about multi-homing for a Layer-2 service is TRUE?
- A. The Nokia 7750 SR supports a CE being multi-homed to a maximum of two PEs.
- B. In the single-active mode, the CE forwards traffic to all attached PES and receives traffic from a single PE.
- C. In the single-active mode, the CE requires a LAG to be configured between the CE and all attached PEs.
- D. In the all-active mode, all PES attached to a CE can forward traffic to and from the CE.
正解：D
解説：
Explanation
In the all-active mode, all PEs attached to a CE can forward traffic to and from the CE. This provides load balancing and redundancy for the CE. The CE does not require a LAG to be configured between the CE and all attached PEs1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 21
Based upon the exhibit,
which of the following statements about the forwarding of BUM traffic is FALSE?
- A. PE3 replicates the traffic and sends it to all PES in its VPLS I flooding list.
- B. PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.
- C. PE2 decapsulates the packets received from PE3 and forwards the frames to CE2.
- D. PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.
正解：B
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 # 22
Which of the following statements about the EVPN data plane is FALSE?
- A. EVPN-MPLS provides services over a simple IP network.
- B. The customer data is encapsulated and then tunneled between the PE routers.
- C. EVPN allows a service provider to deliver multiple services over a single core network.
- D. EVPN-MPLS encapsulated data has a label that uniquely identifies each service.
正解：A
解説：
Explanation
EVPN-MPLS provides services over an MPLS network, not a simple IP network. The customer data is encapsulated with an MPLS label that identifies the service and then tunneled between the PE routers using MPLS LSPs1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 23
In the exhibit, PE2 is receiving an EVPN auto-discovery (A-D) route from PEI. Based on the output, which of the following statements is FALSE?
- A. This route indicates that the EVPN service is configured on PEI with a service MTU of 1514.
- B. This route is an A-D per EVPN instance (A-D per EVI) route advertised by PEI for a VPWS.
- C. This route indicates that the EVPN service is configured on PEI with an EVPN instance (EVI) of 113.
- D. This route indicates that the EVPN service configured on PEI is multi-homed.
正解：A
解説：
Explanation
This route indicates that the EVPN service is configured on PE1 with a service MTU of 1500, not 1514. The service MTU is indicated by the MPLS label value in hexadecimal format. The MPLS label value of 0x05DC corresponds to a decimal value of 1500.
質問 # 24
Examine the exhibit.
Which of the following configuration conditions is required for the proper operation of EVPN VPWS 2?
- A. The local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.
- B. The local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.
- C. The local AC tag ID and the remote AC tag ID configured on PE2 must match.
- D. The remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.
正解：A
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 # 25
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 IP-Prefix route for prefix 10.10.1.0/24 to PE3. The BGP update includes MAC-OI as on overlay index.
- 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 MAC route for MAC-OI to PE3. The BGP update includes the route-target value configured for VPRN 15.
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 # 26
Based upon the exhibit, how many MAC-VRFs are there?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
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 # 27
Which of the following statements about the EVPN route types used to support multi-homing is TRUE?
- A. A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.
- B. ES routes provide the ESI label required to support the split-horizon mechanism.
- C. Auto-discovery (A-D) routes are imported by all PES participating in the EVPN service.
- D. Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.
正解：D
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 # 28
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最新オフィシャル資料は4A0-115認証された4A0-115問題集PDF：https://www.passtest.jp/Nokia/4A0-115-shiken.html
最新推薦する4A0-115問題集はNokia Service Routing Architect認証された：https://drive.google.com/open?id=16dJINm7CU0JIKw3qgy76OWtrNB28NNu5