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Quiz
Question 1/101/10
VPWS allows carriers to offer services such as point-to-point frame-relay, ATM, and Ethernet on a single platform without the need for multiple overlay networks.
Select the answer:Select the answer
1 correct answer
A.
TRUE
B.
FALSE
The correct answer is A. TRUE VPWS stands for Virtual Private Wire Service. It is a type of Layer 2 VPN service that allows a service provider to emulate a point-to-point private line between two customer sites over a shared packet-switched network. With VPWS, carriers can deliver multiple service types such as: - Point-to-point Frame Relay - ATM - Ethernet all using one underlying transport platform, instead of building separate overlay networks for each service type. Why this is true: - VPWS provides a single infrastructure for carrying different Layer 2 services. - It simplifies network design and operation. - It eliminates the need for separate physical or logical overlay networks for each legacy service. So the statement is correct: VPWS allows carriers to offer these services on a single platform without the need for multiple overlay networks.
Right Answer: A
Quiz
Question 2/102/10
Which of the following best describes a VPLS?
Select the answer:Select the answer
1 correct answer
A.
Layer 3 direct Internet access service
B.
Layer 2 point-to-point service
C.
Layer 2 multipoint-to-multipoint service
D.
Layer 3 IP multipoint-to-multipoint VPN service
The correct answer is C. Layer 2 multipoint-to-multipoint service. VPLS stands for Virtual Private LAN Service. It is a type of Layer 2 VPN that makes geographically separated sites appear as if they are on the same Ethernet LAN. In other words, it extends a broadcast domain across a provider network. Why C is correct: - Layer 2 means it carries Ethernet frames, not IP routing information. - Multipoint-to-multipoint means every site in the VPLS can communicate with every other site, just like devices on the same LAN. - It is commonly used to connect multiple branch offices so they behave as if they are in one local network. Why the other options are incorrect: - A. Layer 3 direct Internet access service - This describes Internet connectivity, not a VPN service like VPLS. - B. Layer 2 point-to-point service - Point-to-point would connect only two endpoints, which is more like a pseudowire, not VPLS. - D. Layer 3 IP multipoint-to-multipoint VPN service - This describes a Layer 3 VPN, where routing is handled by IP/MPLS or similar mechanisms, not a Layer 2 Ethernet-based service. In short, VPLS is a Layer 2 service that connects multiple sites in a full mesh-like LAN environment, so the best description is multipoint-to-multipoint.
Right Answer: C
Quiz
Question 3/103/10
Which of the following is NOT a VPWS service supported on the Nokia 7750 SR?
Select the answer:Select the answer
1 correct answer
A.
Epipe
B.
Fpipe
C.
Apipe
D.
Ipipe
E.
Cpipe
F.
Gpipe
The correct answer is F. Gpipe VPWS stands for Virtual Private Wire Service. On the Nokia 7750 SR, VPWS service types are used to provide point-to-point Layer 2 connectivity between two endpoints. Nokia supports several specific VPWS service types, each intended for a different traffic or encapsulation use case. The supported VPWS service types listed in the options are: - Epipe: Used for Ethernet point-to-point service. - Fpipe: Used for Frame Relay-related service. - Apipe: Used for ATM-related service. - Ipipe: Used for IP service. - Cpipe: Used for PPP/HDLC-type circuit emulation or circuit-based services, depending on context. Gpipe is not one of the VPWS service types supported on the Nokia 7750 SR. So the option that is NOT a supported VPWS service is: F. Gpipe If you want, I can also explain what each pipe type is typically used for in Nokia service terminology.
Right Answer: F
Quiz
Question 4/104/10
A service can be either local or distributed.
Select the answer:Select the answer
1 correct answer
A.
TRUE
B.
FALSE
The correct answer is A. TRUE. A service can be implemented in different ways depending on how it is accessed and where it runs. - Local service: The service runs on the same machine or within the same system as the client or application using it. - Distributed service: The service is spread across multiple machines or networked systems, and clients access it over a network. Because services are not limited to just one location or architecture, they can indeed be either local or distributed. Therefore, the statement is true.
Right Answer: A
Quiz
Question 5/105/10
When configuring distributed services across a network, it is considered best practice to configure which of the following parameters as globally significant? (Choose 2)
Select multiple answer: (Choose 2)Select the answer
2 correct answers
A.
SDP ID
B.
Service ID
C.
Customer ID
D.
SAP ID
The correct answers are B. Service ID and C. Customer ID. Here is why: In distributed service environments, some parameters need to be unique and consistent across the entire network, not just within one device or local segment. These are considered globally significant because they help ensure that services can be identified, managed, and routed correctly everywhere. Why B. Service ID is correct: - A Service ID uniquely identifies a specific service instance. - If the same service exists on multiple nodes or across different parts of the network, the Service ID should remain globally consistent. - This helps avoid ambiguity when services are referenced or managed from different systems. Why C. Customer ID is correct: - A Customer ID identifies the customer associated with the service. - In distributed networks, customer identity must remain consistent across the whole environment. - This is important for policy enforcement, accounting, billing, and service association. Why A. SDP ID is not correct: - SDP ID typically identifies a Service Distribution Path. - This is usually more of a transport or local configuration identifier, not something that must be globally significant in the same way as service or customer identity. Why D. SAP ID is not correct: - SAP ID refers to a Service Access Point. - SAPs are interface/attachment points and are generally locally meaningful rather than globally significant. - They are used to connect services to the network, but they are not usually the best choice for a globally unique identifier. In summary: - Service ID and Customer ID are the parameters that should be configured as globally significant. - SDP ID and SAP ID are more local or topology-specific identifiers. Correct answer: B and C
Right Answer: B, C
Quiz
Question 6/106/10
When a physical port is configured for null encapsulation, many SAPs can be configured using that port.
Select the answer:Select the answer
1 correct answer
A.
TRUE
B.
FALSE
The correct answer is B. FALSE. Null encapsulation means the physical port is not using an encapsulation method to distinguish multiple SAPs on that port. In practice, this means the port is typically associated with a single SAP, rather than many. A SAP, or Service Access Point, is how a service is identified on a port or interface. When a port uses encapsulation types such as Ethernet, dot1q, or qinq, multiple SAPs can often be configured because the encapsulation provides a way to separate traffic streams. With null encapsulation, there is no such tagging or identification mechanism on the port, so it does not support configuring many SAPs in the same way. Therefore, the statement “many SAPs can be configured using that port” is false.
Right Answer: B
Quiz
Question 7/107/10
Which of the following statements is FALSE regarding SAPs?
Select the answer:Select the answer
1 correct answer
A.
VPWS: SAPs can be defined on Ethernet, POS, Sonet/SDH, or TDM channels.
B.
VPWS: Two SAPs are defined for a service that originates and terminates on the same Nokia 7750 SR
C.
VPLS: More than two SAPs can be defined in a service.
D.
VPWS: SAPs are associated with an IP interface.
The false statement is D. Here’s why: SAP means Service Access Point. In Nokia 7750 SR terminology, a SAP is the attachment point where a service connects to a physical or logical interface on the router. Let’s review each option: A. VPWS: SAPs can be defined on Ethernet, POS, Sonet/SDH, or TDM channels. This is true. In VPWS, SAPs can be created on supported port types such as Ethernet, POS, SONET/SDH, and certain TDM channel types, depending on platform and configuration. B. VPWS: Two SAPs are defined for a service that originates and terminates on the same Nokia 7750 SR. This is true. A VPWS is point-to-point. If both ends are on the same Nokia 7750 SR, the service still has two SAPs, one for each endpoint. C. VPLS: More than two SAPs can be defined in a service. This is true. VPLS is multipoint, so it can have multiple SAPs connected to the same service. D. VPWS: SAPs are associated with an IP interface. This is false. SAPs are not associated with IP interfaces. They are associated with physical or logical layer 2 service interfaces, not layer 3 IP interfaces. IP interfaces are used for routed services, while SAPs are used to attach services like VPWS and VPLS at the service access layer. Therefore, the correct answer is D.
Right Answer: D
Quiz
Question 8/108/10
SAPs in an Epipe service can only be configured on Ethernet ports
Select the answer:Select the answer
1 correct answer
A.
TRUE
B.
FALSE
Answer: B. FALSE In an Epipe service, SAPs (Service Access Points) are not limited to Ethernet ports only. While Ethernet ports are a common and typical choice for configuring SAPs in Epipe services, SAPs can also be configured on other supported Layer 2 attachment points depending on the platform and service capabilities. The statement is false because it uses the word "only," which is too restrictive. SAPs in Epipe services can be associated with different access types, not just Ethernet ports, as long as the underlying interface and service configuration are supported. Why B is correct: - Epipe is a Layer 2 point-to-point service. - SAPs define where customer traffic enters the service. - SAPs are not exclusively tied to Ethernet ports. - Other supported interfaces or service attachment methods may also be used. So the correct answer is: B. FALSE
Right Answer: B
Quiz
Question 9/109/10
Which of the following commands is used to configure the encapsulation type of an Ethernet port?
Select the answer:Select the answer
1 correct answer
A.
configure ethernetencap-typedot1q|null|qinq port port-id
B.
configure service port port-id ethemetencap-typedot1q|null|qinq create
C.
configure port port-id Ethernet encap-type dot1q|null|qmq
D.
configure service service-id Ethernet encap-type dot1q|null|qinq create
The correct answer is C. The question asks for the command used to configure the encapsulation type of an Ethernet port. In networking, encapsulation type on an Ethernet port typically refers to how VLAN tagging or service framing is handled, such as: - dot1q for IEEE 802.1Q VLAN tagging - null for untagged traffic - qinq for double-tagged VLAN frames Why C is correct: - C. configure port port-id Ethernet encap-type dot1q|null|qmq - This option is the only one that is structured as a direct port-level configuration command. - It clearly specifies: - configure port - port-id - Ethernet encap-type - That matches the requirement to configure the encapsulation type of an Ethernet port. Why the other options are incorrect: - A. configure ethernetencap-typedot1q|null|qinq port port-id - This is poorly formed and does not follow a valid command structure. - The keywords are concatenated incorrectly. - B. configure service port port-id ethemetencap-typedot1q|null|qinq create - This appears to be a service-related command, not a direct port encapsulation command. - It also contains misspellings and incorrect formatting. - D. configure service service-id Ethernet encap-type dot1q|null|qinq create - This configures a service, not a port. - The question specifically asks about an Ethernet port. Summary: If the goal is to configure the encapsulation type of an Ethernet port, the command must target the port directly. That makes C the correct answer.
Right Answer: C
Quiz
Question 10/1010/10
Which of the following best describes a distributed Epipe Service?
Select the answer:Select the answer
1 correct answer
A.
An Epipe that has 2 or more SDPs configured.
B.
An Epipe that has 3 or more SAPs configured.
C.
An Epipe that has 2 SAPs on the same node but no SDPs configured
D.
An Epipe that is configured between two nodes, each having 1 SAP and 1 SDP configured.
A distributed Epipe Service is best described as a point-to-point Ethernet service that spans two different nodes, where each side of the service has a SAP and uses an SDP to connect across the provider network. Correct answer: D. An Epipe that is configured between two nodes, each having 1 SAP and 1 SDP configured. - An Epipe is a Layer 2 Ethernet pseudowire service used to connect two endpoints. - In a distributed setup, the endpoints are not on the same device. - Each node has a Service Access Point (SAP) for customer attachment. - Each node also has a Service Destination Point (SDP) to carry traffic across the network to the remote node. - This arrangement creates the Epipe service across two separate nodes. Why the other options are incorrect: - A. An Epipe that has 2 or more SDPs configured. - Having multiple SDPs does not by itself define a distributed Epipe. The key requirement is the service spanning two nodes with SAP/SDP connectivity. - B. An Epipe that has 3 or more SAPs configured. - An Epipe is normally a point-to-point service, not a multi-access service. Multiple SAPs on one service would not describe a standard Epipe. - C. An Epipe that has 2 SAPs on the same node but no SDPs configured. - This would be a local service on one node, not a distributed service across nodes. In short, a distributed Epipe is one that connects two nodes, each with a SAP and an SDP, which matches option D.
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Quiz name:4A0-C03: Nokia NRS II Composite Exam: IS-IS version
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