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100+ Free Nokia Services Architecture Practice Questions

Pass your Nokia Services Architecture (4A0-104) exam on the first try — instant access, no signup required.

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Which BGP construct controls which routes are imported into and exported from a VRF?

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Key Facts: Nokia Services Architecture Exam

40

Exam Questions

Multiple-choice format

90 min

Time Limit

Pearson VUE delivery

70%

Passing Score

About 28 of 40 correct

$125

Exam Fee

Per attempt, USD

3 yrs

Validity

Nokia SRC program

Pearson VUE

Test Delivery

Test center or OnVUE online

The Nokia Services Architecture exam (4A0-104) is a 40-question, 90-minute multiple-choice exam with a 70% passing score and $125 USD fee, delivered by Pearson VUE. It validates SR OS service configuration: SAPs and SDPs on the 7750 SR, Layer 2 VLLs (Epipe per RFC 4448, plus Apipe, Cpipe, Fpipe, Ipipe), VPLS and H-VPLS (RFC 4762), VPRN with MP-BGP VPN-IPv4 (RFC 4364), and EVPN-MPLS (RFC 7432). The credential is part of the Nokia Service Routing Certification program and is valid for 3 years before recertification is required.

Sample Nokia Services Architecture Practice Questions

Try these sample questions to test your Nokia Services Architecture exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1On the Nokia 7750 SR service model, which object represents the local attachment between a customer and a service on a specific port and encapsulation?
A.SDP (Service Distribution Point)
B.SAP (Service Access Point)
C.VC label
D.Customer ID
Explanation: A Service Access Point (SAP) is the logical local attachment of a customer to a service on a specific port (or LAG) and encapsulation value. Each SAP belongs to exactly one service and one customer.
2Which Nokia SR OS object provides the transport tunnel that carries service traffic between two PE routers?
A.SAP
B.SDP
C.VRF
D.Service ID
Explanation: An SDP (Service Distribution Point) is the logical transport tunnel between two PEs. It rides on an MPLS LSP (LDP, RSVP-TE, MPLS-TP, or SR), or on a GRE or IP tunnel, and carries one or more service VC labels.
3A SAP is configured as 1/1/1:100 on a 7750 SR. What does the value 100 represent?
A.The customer ID associated with the SAP
B.The service ID the SAP belongs to
C.The dot1q VLAN tag used as service-delimiting encapsulation
D.The SDP ID used to reach the remote PE
Explanation: In Nokia SAP notation port:value, the value after the colon is the service-delimiting encapsulation. For a dot1q-encapsulated port, 1/1/1:100 selects frames tagged with VLAN 100.
4Which SAP encapsulation value is used to match all VLAN-tagged frames that do not match a more specific dot1q SAP on a port configured for dot1q encap?
A.1/1/1.*
B.1/1/1:0
C.1/1/1:*
D.1/1/1
Explanation: On a dot1q-encapped port, 1/1/1:* is the default SAP that matches any VLAN tag not consumed by a more specific dot1q SAP on the same port. It acts as the catch-all for tagged traffic.
5On a Nokia 7750 SR port configured for null encapsulation, what does the SAP identifier 1/1/1 (or 1/1/1.*) match?
A.Any tagged frame regardless of VLAN
B.All frames arriving on the port (untagged, treated as a single service)
C.Only Q-in-Q tagged frames
D.Frames with the priority bit set
Explanation: Null encapsulation maps the entire physical port (or LAG) to a single SAP. All frames arriving on the port belong to the same service; VLAN tags, if present, are passed transparently as customer data.
6Which port encapsulation type lets a single Nokia 7750 SR port carry multiple Q-in-Q services distinguished by both the outer and inner VLAN tags?
A.null
B.dot1q
C.qinq
D.ppp-auto
Explanation: Q-in-Q (IEEE 802.1ad) port encapsulation lets the SAP match on both the outer S-VLAN and the inner C-VLAN, e.g., 1/1/1:100.200, so different inner tags can map to different services.
7Which statement best describes the relationship between customer ID and service ID in the Nokia 7750 SR service model?
A.Each customer ID can be associated with one service ID only
B.A single customer ID can own multiple service IDs (1:N relationship)
C.Service IDs are shared between customers by default
D.Customer ID and service ID are the same value with different formatting
Explanation: In Nokia SR OS, a customer is a logical grouping that can own many services. Every service must reference exactly one customer ID, but the same customer ID can be reused across many service IDs (Epipe, VPLS, VPRN, etc.).
8Which transport tunnel types can underpin an SDP on a Nokia 7750 SR? (Choose the most complete list.)
A.Only RSVP-TE LSPs
B.Only LDP LSPs
C.MPLS LSP (LDP or RSVP-TE), MPLS-TP, GRE, or routed IP
D.Only Ethernet point-to-point links
Explanation: An SDP can be built over an MPLS LSP signaled by LDP or RSVP-TE, an MPLS-TP transport, a GRE tunnel, or routed IP for some service types. The choice depends on the service requirements and network design.
9What is the difference between a mesh SDP and a spoke SDP in a VPLS service?
A.Mesh SDPs use RSVP-TE; spoke SDPs use LDP
B.Mesh SDPs are subject to split-horizon group rules; spoke SDPs forward freely between core and access
C.Mesh SDPs run only over GRE; spoke SDPs run only over MPLS
D.There is no functional difference; the names are aliases
Explanation: Mesh SDPs in a VPLS belong to the same split-horizon group, so traffic received on one mesh SDP is not flooded out another mesh SDP. Spoke SDPs are not in the mesh split-horizon group and can re-flood traffic to other PEs, which is required for hierarchical VPLS.
10Inside an SDP, which label uniquely identifies a specific service among the many that can share the tunnel?
A.Outer transport label
B.VC (service) label
C.Router ID
D.Implicit-null label
Explanation: Service traffic on a Nokia SR is encapsulated with two MPLS labels: the outer transport label of the SDP and an inner VC (service) label that demultiplexes services at the egress PE. The VC label is signaled by Targeted LDP for VPN services.

About the Nokia Services Architecture Exam

The Nokia Services Architecture (4A0-104) exam validates the candidate's ability to design, configure, and troubleshoot service-provider services on the Nokia 7750 SR platform. Topics include the SR OS service model (customer, service, SAP, SDP), Layer 2 VLL services (Epipe Ethernet PWE3 per RFC 4448, Apipe ATM, Cpipe TDM, Fpipe Frame Relay, Ipipe IP interworking), VPLS and Hierarchical VPLS per RFC 4762, BGP/MPLS Layer 3 VPNs (VPRN) per RFC 4364 with MP-BGP VPN-IPv4, EVPN per RFC 7432 (route Types 1-5, ESI, multihoming, DF election), and Service OAM (Y.1731 ETH-CFM, MPLS LSP ping, BFD).

Assessment

40 multiple-choice questions over 90 minutes covering Nokia 7750 SR service architecture, Layer 2 VLLs (Epipe, Apipe, Cpipe, Fpipe, Ipipe), VPLS, VPRN, and EVPN-MPLS

Time Limit

90 minutes

Passing Score

70%

Exam Fee

$125 (Nokia / Pearson VUE)

Nokia Services Architecture Exam Content Outline

20%

Service Router Architecture

Nokia 7750 SR service model: customer ID, service ID, SAP (port:encap such as 1/1/1:100), SAP encapsulations (null, dot1q, qinq, dot1q+inner-tag), SDPs (mesh vs spoke) over MPLS LSP/MPLS-TP/GRE/IP, transport label plus VC (service) label.

25%

Layer 2 Services (VLLs and Epipe)

Epipe Ethernet PWE3 (RFC 4448), Apipe ATM, Cpipe TDM (SAToP/CESoPSN), Fpipe Frame Relay, Ipipe IP interworking. T-LDP signaling, control word, MTU sizing, raw vs tagged mode, MAC pinning.

25%

VPLS

RFC 4762 LDP-signaled VPLS, PE-as-bridge forwarding, MAC learning with default 300s aging, BUM flooding, mesh-SDP split horizon, spoke SDPs, H-VPLS with MTU-s and n-PE, head-end replication, IGMP/PIM snooping.

20%

Layer 3 VPN (VPRN)

RFC 4364 BGP/MPLS L3VPN. MP-BGP VPN-IPv4 (AFI 1 SAFI 128), Route Distinguisher Types 0/1/2, Route Target import/export, VRF RIB/FIB, PE-CE eBGP/static/RIP/OSPF/IS-IS, Site-of-Origin, hub-and-spoke RT design, Inter-AS Option B.

10%

EVPN and Operations

EVPN (RFC 7432) with AFI 25 SAFI 70, route Types 1-4 plus Type 5 (RFC 9136), ESI 10-byte identifier, all-active vs single-active multihoming with DF election, EVPN-MPLS vs EVPN-VXLAN, Service OAM (Y.1731 ETH-CFM, MPLS LSP ping, BFD), Nokia show service and show router commands.

How to Pass the Nokia Services Architecture Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: 40 multiple-choice questions over 90 minutes covering Nokia 7750 SR service architecture, Layer 2 VLLs (Epipe, Apipe, Cpipe, Fpipe, Ipipe), VPLS, VPRN, and EVPN-MPLS
  • Time limit: 90 minutes
  • Exam fee: $125

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Nokia Services Architecture Study Tips from Top Performers

1Memorize the SAP notation: 1/1/1:100 = port 1/1/1 dot1q VLAN 100; 1/1/1:* = catch-all on dot1q port; 1/1/1.* = null encap matching the whole port
2Lock in the VLL family: Epipe = Ethernet (RFC 4448), Apipe = ATM, Cpipe = TDM (SAToP/CESoPSN), Fpipe = Frame Relay, Ipipe = IP interworking between dissimilar L2 access types
3Know that mesh SDPs in a VPLS are split-horizon by default; spoke SDPs are not, which is what makes H-VPLS scale and what enables MTU-s to bridge between access spokes and the n-PE core
4For VPRN, lock in the BGP family pair: VPN-IPv4 uses AFI 1 SAFI 128, RD makes prefixes unique on the wire (Types 0/1/2), and Route Targets control VRF import/export. EVPN uses AFI 25 SAFI 70
5For EVPN, drill the five route types: Type 1 A-D, Type 2 MAC/IP, Type 3 Inclusive Multicast Ethernet Tag, Type 4 Ethernet Segment, Type 5 IP Prefix (RFC 9136). ESI is 10 bytes (1 type + 9 value)
6Practice Nokia ops commands: show service service-using, show service id <id> all/base/sap/sdp/fdb-mac, show router bgp summary all, show router bgp routes vpn-ipv4 (or evpn)

Frequently Asked Questions

What is the Nokia Services Architecture (4A0-104) exam?

Nokia 4A0-104 is the Services Architecture exam in the Nokia Service Routing Certification (SRC) program. It validates a candidate's ability to design, configure, and troubleshoot SR OS services on the 7750 SR: SAP/SDP architecture, Layer 2 VLLs (Epipe, Apipe, Cpipe, Fpipe, Ipipe), VPLS and H-VPLS, VPRN BGP/MPLS L3VPN, and EVPN-MPLS.

How many questions are on the Nokia 4A0-104 exam and what is the passing score?

The exam delivers 40 multiple-choice questions in a 90-minute appointment, with a 70% passing score (about 28 correct answers). Questions are weighted across service architecture, L2 VLLs, VPLS, VPRN, and EVPN/operations.

How much does the Nokia 4A0-104 exam cost?

The Nokia 4A0-104 Services Architecture exam costs $125 USD per attempt and is administered through Pearson VUE either at a test center or via OnVUE online proctoring.

What topics are covered on Nokia 4A0-104?

The exam covers the 7750 SR service model (SAP, SDP, customer, service IDs), Layer 2 VLLs based on PWE3 (Epipe per RFC 4448, plus Apipe ATM, Cpipe TDM, Fpipe Frame Relay, Ipipe IP interworking), VPLS and H-VPLS per RFC 4762, BGP/MPLS L3VPN VPRN per RFC 4364 with MP-BGP VPN-IPv4 (RFC distinguishers, route targets, VRFs, PE-CE routing), and EVPN per RFC 7432 with route Types 1-5, ESI, all-active and single-active multihoming, plus Service OAM (Y.1731, MPLS LSP ping, BFD).

Do I need NRS I (4A0-100) before taking 4A0-104?

Nokia does not formally require NRS I as a prerequisite for 4A0-104, but most candidates pass NRS I first because 4A0-104 assumes solid knowledge of SR OS, MPLS, OSPF/IS-IS, and BGP fundamentals. Nokia officially recommends taking the IP/MPLS Services course before attempting the exam.

How long is the Nokia 4A0-104 credential valid?

Nokia SRC certifications are valid for 3 years from the issue date. To renew, candidates must pass any current SRC exam (including a refreshed 4A0-104) before expiry; otherwise they must retake the certification path.

How should I prepare for the Nokia 4A0-104 exam?

Use the SR OS Service Configuration Guide and the Nokia IP/MPLS Services course as your core texts, drill SAP encapsulations and SDP types, review RFC 4448 (Epipe), RFC 4762 (VPLS), RFC 4364 (VPRN), and RFC 7432 (EVPN), and practice show service and show router bgp commands on lab gear. Complement with these 100 free practice questions to find weak areas.