更新されたのは2023年11月16日認定試験4A0-115問題集で練習テスト問題
更新された検証済みの4A0-115問題集と解答で合格保証もしくは全額返金
Nokia 4A0-115 認定試験の出題範囲：
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質問 # 12
Examine the exhibit.
Which of the following statements about the operation of VPLS 20 is TRUE?
- A. PE3 signals a service label to PE4 when its VPLS 20 is enabled and is bound to an operational SDP.
- B. PE3 advertises an IMET route to PEI when its VPLS 20's mesh-SDP becomes operationally UP.
- C. PEI advertises a MAC route for MAC-OI when its VPLS 2(Ys SAP becomes operationally UP.
- D. The flooding list maintained by PEI for VPLS 20 contains three entries: PE2, PE3, and PE4.
正解：C
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 # 13
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 # 14
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 # 15
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 # 16
Which of the following statements about the operation of a single-homed EVPN VPWS is TRUE?
- A. The same tag ID must be configured for the local attachment circuit (AC) at each PE.
- B. Each PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.
- C. The advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.
- D. Each PE verifies that the received tag ID matches its configured local AC tag ID.
正解：C
解説：
Explanation
The advertised A-D per EVI route includes a non-zero tag ID and a zero MPLS label. The tag ID is used to identify the VPWS service, while the MPLS label is not used for single-homed VPWS services1.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 17
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 # 18
In the exhibit, the EVPN-IRB is using the interface-ful unnumbered model and is fully operational. Which of the following statements isFALSE?
- A. An MP-BGP session that supports the advertisement of EVPN routes is established between PEI and PE2.
- B. On PE3, the routing table for VPRN 15 contains an entry for 10.10.4.0/24. This entry is resolved using a transport tunnel towards PEA.
- C. On PE3, the routing table for VPRN 15 contains an entry for 10.10.1.0/24. This entry is resolved to MAC-OI as an overlay index.
- D. An MP-BGP session that supports the advertisement of VPN-IPv4 routes is established between PE3 and PE4.
正解：C
解説：
Explanation
On PE3, the routing table for VPRN 15 does not contain an entry for 10.10.1.0/24. This entry is not needed because Host 1 is in the same subnet as the SBD IRB interface on PE3, and PE3 can reach Host 1 using its MAC address2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 19
Proxy-ARP/ND is operational for a VPLS. Which of the following statements is FALSE?
- A. When the PE learns a local host IP address, it adds an entry into its proxy-ARP table.
- B. The proxy-ARP table is populated by snooping IP packets received from remote PEs.
- C. The PE has proxy-ARP and dynamic-populate enabled for the VPLS.
- D. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.
正解：A
解説：
Explanation
When the PE learns a local host IP address, it does not add an entry into its proxy-ARP table. The proxy-ARP table is populated by snooping IP packets received from remote PEs. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.
質問 # 20
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 # 21
An operator configures an EVPN-IRB that uses the interface-ful unnumbered forwarding model on a Nokia
7750 service router. Which ofthe following statements regarding the configuration performed on each participating PE is FALSE?
- A. An IP address is configured in the VPRN interface that is bound to the SBD VPLS.
- B. A VPRN service is configured and has an interface bound to the local VPLS.
- C. A supplementary broadcast domain (SBD) is configured as a routed VPLS.
- D. The advertisement of IP-Prefix routes is enabled in the SBD VPLS.
正解：D
解説：
Explanation
The advertisement of IP-Prefix routes is not enabled in the SBD VPLS. The advertisement of IP-Prefix routes is enabled in the VPRN service that is associated with the SBD VPLS2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 22
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 # 23
Which of the following statements about EVPN auto-discovery per EVPN instance (A-D per EVI) routes is FALSE?
- A. A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.
- B. The updates are used to discover all the PES associated with an Ethernet segment.
- C. The updates include an Ethernet tag ID that is set to zero.
- 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 # 24
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 # 25
Which of the following statements about an EVPN with integrated routing and bridging (EVPN-IRB) service is FALSE?
- A. In this service, the IRB interface acts as a default gateway for hosts in the corresponding subnet.
- B. This service requires the use of EVPN-MPLS for data plane.
- C. This service enables the use of EVPN to provide connectivity between hosts in different subnets.
- D. This service consists of a VPRN and multiple VPLSs.
正解：B
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 # 26
Based upon the exhibit, which of the following statements is FALSE?
- A. On PE3 and PE4, VPLS 10 must be configured with two different route-distinguisher values: one for VXLAN and another for MPLS.
- B. A BGP export policy is required on PE3 and PE4 to ensure that IMET routes originated with VXLAN encapsulation are not advertised to the peer across the core network.
- C. VPLS 10 must be configured with two BGP instances on PE3 and PE4.
- D. On PE3 and PE4, VPLS 10 must be configured with two different route-target values: one for VXLAN and another for MPLS.
正解：C
解説：
Explanation
VPLS 10 does not need to be configured with two BGP instances on PE3 and PE4. VPLS 10 can be configured with a single BGP instance that supports both VXLAN and MPLS encapsulations.
質問 # 27
In the exhibit, the interface-ful numbered model is used for the Layer-3 EVPN service. Which of the following is used as the source MAC address in the packets sent from PEI when forwarding customer traffic to Host 2?
- A. MAC-03
- B. MAC-04
- C. MAC-OI
- D. MAC-11
正解：C
解説：
Explanation
MAC-01 is used as the source MAC address in the packets sent from PE1 when forwarding customer traffic to Host 2. MAC-01 is the MAC address of the SBD IRB interface configured in VPRN 11 on PE12.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 28
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