2023年最新のに更新された検証済みの合格させる4A0-115リアル試験問題と解答
問題集返金保証付きの4A0-115問題集公式問題集
Nokia 4A0-115 認定試験の出題範囲：
| トピック | 出題範囲 |
|---|---|
| トピック 1 |
|
| トピック 2 |
|
| トピック 3 |
|
| トピック 4 |
|
| トピック 5 |
|
| トピック 6 |
|
質問 # 15
Which of the following statements about EVPN Layer-3 services that utilize the interface-ful model is TRUE?
- A. Intra-subnet traffic is carried over the tunnels provided by the SBD VPLS.
- B. The MAC/IP routing information is used to populate the VPRN routing table at the remote PEs.
- C. EVPN MAC/IP routes are used to advertise the IP prefixes of subnets attached to a VPRN.
- D. VPRN instances are interconnected using a supplementary broadcast domain (SBD) VPLS.
正解：A
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 # 16
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 and the remote AC tag ID configured on PE2 must match.
- B. The local AC tag ID configured on PEI must match the local AC tag ID configured on PE3.
- C. The remote AC tag ID configured on PE2 must match the remote AC tag ID configured on PE3.
- D. The local AC tag ID configured on PE2 must match the local AC tag ID configured on PEI.
正解：D
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 # 17
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 PE2.
- 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 PE3.
- D. PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
正解：A
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 # 18
The interface-ful numbered model is used for a Layer-3 EVPN service. Which of the following statements is FALSE?
- A. EVPN routes are advertised with a service label associated with the SBD VPLS.
- B. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of SBD IRB interfaces.
- C. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts.
- D. IP-Prefix routes exchanged between PES include a non-zero gateway IP address as an overlay index.
正解：B
解説：
Explanation
EVPN MAC/IP routes are not used to advertise the MAC and IP addresses of SBD IRB interfaces. EVPN MAC/IP routes are used to advertise the MAC and IP addresses of local hosts attached to the SBD VPLS2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 19
Which of the following statements about PE-to-PE MAC address advertisement is FALSE?
- A. The service distinguisher (label or VNI) is advertised with the MAC/IP EVPN update.
- B. A PE advertises locally-learned MAC addresses to remote PES using EVPN type-2 routes.
- C. Route targets are used to uniquely identify routes between EVIS in the case of MAC address overlaps.
- D. A PE uses a single MP-BGP session with a remote peer to exchange the routes for all EVIs.
正解：C
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 # 20
Which of the following statements does NOT describe the operation of the Layer-3 EVPN asymmetric forwarding model?
- A. The egress PE does not perform any Layer-3 route look up to forward traffic.
- B. EVPN IP-Prefix routes are used to populate the VPRN VRF tables.
- C. The ingress PE performs both Layer-2 and Layer-3 look ups when forwarding traffic between subnets.
- D. All VPLS instances must be configured on all PES regardless of whether they have a local host or not.
正解：D
解説：
Explanation
All VPLS instances do not need to be configured on all PEs regardless of whether they have a local host or not. Only the VPRN instance needs to be configured on all PEs, while the VPLS instances are configured only on PEs that have a local host attached to them.
質問 # 21
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 non-zero Layer-2 MTLJ.
- B. PEI advertises an A-D per EVI route that includes a tag ID set to 40.
- 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 # 22
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 consults the FDB of RVPLS 1 and forwards the traffic to the local interface of VPRN 11.
- B. PE2 consults the FDB of RVPLS 2 and forwards the traffic to Host 2.
- C. PEI encapsulates the packet with two labels: an outer transport label and an inner service label.
- D. PE2 inspects the service label and determines that it is associated with RVPLS 2.
正解：C
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 # 23
Which of the following EVPN routes are exchanged to support the operation of a multi-homed EVPN VPWS?
- A. Auto-discovery per EVPN instance (A-D per EVI) routes and Auto-discovery per Ethernet segment (A-D per ES) routes only
- B. A-D per EVI routes and 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 # 24
Which of the following statements about the EVPN route types used to support multi-homing is TRUE?
- A. ES routes provide the ESI label required to support the split-horizon mechanism.
- B. Auto-discovery (A-D) routes are imported by all PES participating in the EVPN service.
- C. A-D per Ethernet segment routes indicate the desired designated forwarder election algorithm.
- 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 # 25
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. The MPLS label 524284 presented indicates the service label value that the neighbor 10.10.10.2 uses to forward BUM traffic to PEI.
- C. When forwarding BUM traffic, the local PE must replicate the traffic and send it as unicast to the advertising neighbor.
- D. When forwarding BUM traffic, the local PE uses an MPLS transport tunnel towards the advertising neighbor.
正解：C
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
A Layer-3 EVPN service is configured to use the interface-ful unnumbered forwarding model. Which of the following statements isFALSE?
- A. The VPRN service is configured to allow the advertisement of IP prefixes.
- B. Each participating PE advertises a MAC/IP route that carries the MAC address of SBD IRB interface.
- C. IP-Prefix routes exchanged between PES include a non-zero MAC address as an overlay index.
- D. The SBD IRB interface configured in the VPRN service has no IP address assigned to it.
正解：D
解説：
Explanation
The SBD IRB interface configured in the VPRN service has an IP address assigned to it. The IP address is used as a gateway IP address for hosts in the corresponding subnet2.
Verified References: Nokia Ethernet Virtual Private Network Services Course | Nokia
質問 # 27
Proxy-ARP/ND is operational for a VPLS. Which of the following statements is FALSE?
- A. The PE has proxy-ARP and dynamic-populate enabled for the VPLS.
- B. When the PE learns a local host IP address, it adds an entry into its proxy-ARP table.
- 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：B
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 # 28
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. PEI uses MPLS label 524284 when sending traffic destined to
- C. PE2 advertises this BGP update for a locally-configured VPWS service.
- 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 # 29
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. The advertised A-D per EVI route includes a non-zero tag ID and a non-zero MPLS label.
- C. Each PE verifies that the received tag ID matches its configured local AC tag ID.
- D. Each PE advertises a MAC route and an A-D per EVI route when its local AC becomes operationally UP.
正解：B
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 # 30
In the exhibit,
VPLS 20 is associated with a single-active Ethernet segment on routers PEI and PE3. Which of the following statementsis FALSE?
- A. PEI advertises an A-D per ES route which indicates that ESI 1 is operating in a single-active redundancy mode.
- B. When PEI learns MAC-01, it advertises a MAC/IP route which indicates that MAC-OI is associated with ESI I.
- C. PE3 advertises an A-D per ES route which indicates that ESI I is operating in a single-active redundancy mode.
- D. PEI advertises an A-D per EVI route which includes a P flag set to I to indicate that PEI is the DF for EVI 20.
正解：B
解説：
Explanation
When PE1 learns MAC-01, it advertises a MAC/IP route which indicates that MAC-01 is associated with ESI
1. This route is used by remote PEs to populate their FDBs with MAC-01 and its corresponding ESI.
質問 # 31
......
更新されたPDF（2023年最新）実際にあるNokia 4A0-115試験問題：https://jp.fast2test.com/4A0-115-premium-file.html