About the Exam

An NRS II composite multiple-choice exam that combines the content of Nokia IS-IS Routing Protocol, Border Gateway Protocol Fundamentals for Services, Multiprotocol Label Switching, and Services Architecture into one test. It is intended for candidates pursuing Nokia Network Routing Specialist II certification. Passing it earns credit toward the NRS II certification.

Exam Topics

IS-IS Routing Protocol25%
Border Gateway Protocol Fundamentals for Services25%
Multiprotocol Label Switching25%
Services Architecture25%

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Last updated May 6, 2026 at 5:05 AM

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QuestionQ1

Multiprotocol Label Switching

Which of the following statements regarding an ERO in an RSVP PATH message is FALSE?

A ERO is used by downstream routers to determine the next-hop for the LSP.
B ERO contains label information used to signal an LSP path.
C ERO is not always present in the PATH message.
D Each downstream router updates information inside the ERO.

Explanation

An ERO carries explicit-route subobjects that specify the path, not MPLS label bindings. Label bindings are conveyed using the LABEL object in the RSVP RESV message after a LABEL_REQUEST in the PATH message.

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RFC 3209: RSVP-TE: Extensions to RSVP for LSP Tunnels

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QuestionQ2

Multiprotocol Label Switching

An LSP on a Nokia 7750 SR is configured for one-to-one FRR with node protection. Which statement is FALSE?

A Each PLR signals a protection tunnel that avoids the downstream node.
B A single protection tunnel can protect all LSPs that go through the same hop.
C A link protection tunnel is signaled if a node protection tunnel cannot be established.
D Protection tunnels used in this LSP are also detour tunnels.

Explanation

One-to-one FRR uses a separate RSVP-TE detour tunnel for each individual primary LSP. A protection tunnel shared by multiple LSPs is a facility-mode bypass tunnel, not a one-to-one detour.

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RSVP Point-to-Point LSPs

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QuestionQ3

Border Gateway Protocol Fundamentals for Services

Which statement below about route reflectors is FALSE?

A A full iBGP mesh is required among route reflectors.
B A route reflector can have both iBGP and eBGP clients.
C A router reflector disables the iBGP split-horizon rule for its clients.
D Route reflectors are used to reduce the number of iBGP sessions required in an AS.

Explanation

A route-reflector client is an iBGP router. eBGP neighbors can advertise routes to a route reflector, but they are not route-reflector clients; therefore, a route reflector cannot have eBGP clients. Route reflection relaxes the usual iBGP advertisement restriction for client relationships and reduces the need for a full mesh of iBGP sessions within an AS.

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Juniper Networks: BGP Route Reflectors

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QuestionQ4

Services Architecture

A service must accept frames with either of the following tag combinations:

an outer VLAN tag of 200 and an inner VLAN tag of 33
an outer VLAN tag of 250 and an inner VLAN tag of 33

Which SAP(s) must be configured?

A 1/1/1:200.*
B 1/1/1:*.33
C 1/1/1:.
D This requires two SAPs: 1/1/1:200.33 and 1/1/1:250.33.

Explanation

On SR OS, a dot1q/QinQ SAP is defined as port:qtag1.qtag2, where a wildcard is permitted for the inner qtag when the outer qtag is explicit, but the outer qtag cannot be wildcarded while the inner tag stays explicit, and a single SAP definition cannot enumerate multiple discrete outer-tag values as alternatives. To accept only frames with outer VLAN 200 combined with inner VLAN 33, and separately outer VLAN 250 combined with inner VLAN 33, two SAPs must be configured — one per outer/inner tag pair — since no single wildcarded SAP expression matches exactly those two combinations without also matching unwanted traffic or missing one of the required outer tags.

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QuestionQ5

Border Gateway Protocol Fundamentals for Services

In a traditional (non-EVPN) VPRN service, which of the following statements about a Route Target (RT) is FALSE?

A An RT is used to indicate the VPN service to which a route update is relevant.
B An RT value is assigned to each VPRN service.
C An RT is included as an extended community in MB-BGP route updates.
D Configuring different RT values allows VPN customers to use the same private IP prefixes.

Explanation

A Route Target is a BGP extended community that identifies VPN membership and controls which VPRN/VRF instances import or export a VPN route. Different RT values control route distribution; they do not themselves make overlapping private IP prefixes usable. Prefix overlap is supported by separate VPN/VRF routing contexts and route distinguishers that make otherwise identical VPN route prefixes unique.

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