有効な4A0-115テスト解答Nokia 4A0-115試験PDF問題を試そう
Nokia 4A0-115認定リアル2024年最新の模擬試験合格させます
Nokia 4A0-115 認定試験の出題範囲：
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質問 # 12
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-OI
- B. MAC-03
- C. MAC-04
- D. MAC-11
正解：A
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 # 13
Based on the exhibit below, which of the following statements is TRUE?
- A. PEI uses MPLS label 524284 when sending traffic destined to
- B. PE2 advertises this BGP update for a locally-configured VPWS service.
- C. PEI uses this BGP update to build the flooding list of the associated service.
- D. Neighbor 10.10.10.2 is connected to a multi-homed CE.
正解：C
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 # 14
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 a local attachment circuit (AC) and a remote AC for VPWS 4 on all PE routers.
- C. Configure an MP-BGP session that allows the exchange of EVPN routes between PEI and PE3.
- D. Configure an MP-BGP session that allows the exchange of IPv4 labeled routes between PE3 and PE4.
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 # 15
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. ES routes provide the ESI label required to support the split-horizon mechanism.
- C. Ethernet segment (ES) routes indicate the redundancy mode of the Ethernet segment.
- D. A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.
正解：C
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 # 16
What are EVPN inclusive multicast Ethernet tag (IMET) routes used for?
- A. To advertise the MAC or MAC/IP addresses of locally-learned hosts
- B. To discover all PES participating in the same VPIS service
- C. To advertise the redundancy mode of a local Ethernet segment
- D. To discover all PES attached to the same Ethernet segment
正解：B
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 # 17
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 consists of a VPRN and multiple VPLSs.
- C. This service requires the use of EVPN-MPLS for data plane.
- D. This service enables the use of EVPN to provide connectivity between hosts in different subnets.
正解：C
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 # 18
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 configured on PEI is multi-homed.
- D. This route indicates that the EVPN service is configured on PEI with an EVPN instance (EVI) of 113.
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 # 19
Based upon the exhibit, which of the following statements is FALSE?
- A. Neighbors 10.10.10.2 and 10.10.10.3 have a service that uses a network identifier of 10.
- B. PEI populates this information into the local VPLS FDB.
- C. Neighbors 10.10.10.2 and 10.10.10.3 have proxy-ARP enabled for the VPLS.
- D. PEI uses VXLAN tunnels to reach neighbors 10.10.10.2 and 10.10.10.3.
正解：D
解説：
Explanation
PE1 does not use VXLAN tunnels to reach neighbors 10.10.10.2 and 10.10.10.3. PE1 uses MPLS tunnels to reach these neighbors, as indicated by the MPLS label values in the output.
質問 # 20
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 # 21
In the exhibit,
MACI moves from PEI to PE2. Which of the following actions related to this MAC address mobility is performed?
- A. PEI generates an update message to remote PES identifying the new location of CEI.
- B. PE2 advertises a MAC/IP route for MACI with a sequence number higher than that received from PEI.
- C. CEI generates an update message to PEI withdrawing its MAC.
- D. PE3 waits to receive a data packet from CEI to update its FDB entry for MACI.
正解：B
解説：
Explanation
PE2 advertises a MAC/IP route for MAC1 with a sequence number higher than that received from PE1. This indicates that MAC1 has moved from PE1 to PE2 and triggers a MAC withdrawal message from PE1 to remote PEs. CE1 does not generate an update message to PE1 withdrawing its MAC, nor does PE1 generate an update message to remote PEs identifying the new location of CE11.
Verified References: Ethernet Virtual Private Networks (EVPNs)
質問 # 22
Which of the following statements about multi-homing for a Layer-2 service is TRUE?
- A. In the single-active mode, the CE requires a LAG to be configured between the CE and all attached PEs.
- B. In the all-active mode, all PES attached to a CE can forward traffic to and from the CE.
- C. The Nokia 7750 SR supports a CE being multi-homed to a maximum of two PEs.
- D. In the single-active mode, the CE forwards traffic to all attached PES and receives traffic from a single PE.
正解：B
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 # 23
Which of the following statements about EVPN auto-discovery per EVPN instance (A-D per EVI) routes is FALSE?
- A. The updates include an Ethernet tag ID that is set to zero.
- B. A PE advertises an A-D per EVI route for each operational service defined on an Ethernet segment.
- C. A PE uses the received updates to create aliasing lists to PES that are part of an all-active Ethernet segment.
- D. The updates are used to discover all the PES associated with an Ethernet segment.
正解：B
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
Based upon the exhibit,
which of the following statements about the forwarding of BUM traffic is FALSE?
- A. PE2 decapsulates the packets received from PE3 and forwards the frames to CE2.
- B. PE3 replicates the traffic and sends it to all PES in its VPLS I flooding list.
- C. PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.
- D. PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.
正解：D
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 # 25
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. The MAC/IP routing information is used to populate the VPRN routing table at the remote PEs.
- D. Intra-subnet traffic is carried over the tunnels provided by the SBD VPLS.
正解：D
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 # 26
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 PE has proxy-ARP and dynamic-populate enabled for the VPLS.
- C. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.
- D. The proxy-ARP table is populated by snooping IP packets received from remote PEs.
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 # 27
In the exhibit, the EVPN-IRB is using the interface-ful unnumbered model and is fully operational. Which of the following statements isFALSE?
- A. 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.
- B. An MP-BGP session that supports the advertisement of EVPN routes is established between PEI and PE2.
- C. An MP-BGP session that supports the advertisement of VPN-IPv4 routes is established between PE3 and PE4.
- D. 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.
正解：A
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 # 28
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