4A0-C01 Nokia NRS II Composite Exam Questions and Answers

2

12

30

44

100

The VC ID Cannot be determined from the output

mac-trace

svc-ping

Isp-trace

traceroute

L-LDP

T-LDP

RSVP-TE

MP-BGP

The route learned via IS-IS will be installed.

The route learned via the OSPF type 5 LSA will be installed.

Both routes will be installed, if ECMP is enabled.

Both routes will be installed, regardless of whether ECMP is enabled.

A-pipe

F-pipe

C-pipe

E-pipe

It tests the IGP reachability of the far-end IP address of an SDP.

It tests that the MTU settings of a service are correct.

It tests in-band, uni-directional or round-trip connectivity of SDPs.

It tests the reachability of hosts connected to an SDP.

5000

5004

5008

5018

traceroute 2.3.4.1

traceroute 2.3.4.0/24 next-hop 1.2.3.4

traceroute next-hop 1.2.3.4

traceroute does not work on the Alcatel-Lucent 7750 SR

Not so stubby area

Stub area

Backbone area

Normal area

The packet is flooded out all router interfaces.

The packet is dropped and an ICMP unreachable message is sent back to the source.

The packet is silently discarded.

The packet is flooded out all interfaces and an ICMP unreachable message is sent.

They both function as a Layer 2 switch from the service provider's perspective.

They both support SAP encapsulations of null, dot1Q and Q-in-Q.

They both use SAPs as the demarcation point between the customer and the provider.

MAC addresses are learned by VPLSes, but not by E-pipes.

Both PE1 and PE2 need a mirror source.

PE2 needs a mirror source with the remote source specified.

PE1 needs a mirror source with the remote source specified.

Both PE1 and PE2 need a mirror destination.

PE2 needs a mirror destination that specifies a SAP.

An SDP is not required for a local service.

A single SDP can carry different types of services.

An SDP can simultaneously support GRE and MPLS encapsulation.

An SDP can use the system IP address to indicate the far-end router.

Option A

Option B

Option C

Option D

The neighbor's link-state database has newer information than what it received in the update.

The neighbor sends the update as an acknowledgement.

The neighbor's update indicates that it has run out of space in its LSDB.

The neighbor's update indicates that the sequence number received is the same as the one already in its link-state database.

The router with the highest system ID.

The router with the highest loopback address.

The Hello packet with the highest sequence number.

The existing DIS remains the DIS.

The router with the highest interface MAC address.

Yes, A routing policy is required to advertise routes between PE routers in a VPRN regardless of the CE-PE routing.

Yes, A routing policy is required in this case because BGP is used as the PE-CE routing protocol.

No, a routing policy is not required. By default, the Alcatel-Lucent 7750 SR will advertise all VPRN routes between PE routers.

No, a routing policy is not required on PE1, but an import policy is required on PE2.

A VPRN is a Layer 3 service.

A PE maintains a separate forwarding table for each VPRN.

The service provider manages the customers IP addressing.

Multiple VPRNs can be deployed over the same IP/MPLS network infrastructure.

The MPLS label value may be carried in an ATM header.

The MPLS label value may be carried in a shim header.

The MPLS label value may be carried in an OSPF header.

The MPLS label value may be carried in a Frame Relay header.

Stub must be configured on Area 1 of router R1, and removed from Area 1 on router R3.

Stub must be configured on Area 1 of router R1 and Area 1 of router R3.

Stub must be configured on Area 0 of router R1 and Area 1 of router R3.

Area 1 of router R3 should be Area 0, in order to connect via stub to router R1.

1

2

3

4

The router cannot do a SWAP of this label.

The label does not match the egress label for the same FEC.

The label is for a FEC for which the next-hop is the peer router

The label was signaled in error.

It drops the frame.

It floods the frame to all PEs participating in the service.

It sends a destination unreachable message back to the originating host.

It sends the frame to the closest neighbor.

Mesh SDPs assist MAC learning by flooding traffic to other mesh SDPs.

A PE keeps a single FDB for all VPLSes it has.

Frames received on a SAP that are broadcast, multicast or unknown are flooded.

The FDB only stores the MAC addresses of remote sites.

Use split horizon by default.

Send information about directly connected links to neighbors at periodic intervals.

Use holddown timers when topologies change to allow for convergence.

Maintain multiple databases: neighbor, topology and routing.

1

2

3

4

6

7

The router sends a copy of the LSP from its database to its neighbor

The router updates its database with the LSP and floods a copy to its other neighbors.

The router updates its database with the LSP, acknowledges the LSP with a PSNP and floods a copy to its other neighbors.

The router updates its database with the LSP and acknowledges it with a PSNP.

There are five broadcast links and there are no point-to-point links.

There are five broadcast links and there are five point-to-point links.

There are five broadcast links. It's not possible to say how many point-to-point links there are.

It's not possible to say how many broadcast or point-to-point links there are.

It represents a group of routers on the same non-broadcast network.

It represents the topological database of the backbone network in an IS-IS network.

It represents a broadcast sub-network.

It represents the complete topology of an IS-IS area.

The router with the least number of links.

The router with the lowest router ID.

The router's closest neighbor.

The router doing the calculation.

They are multicast to the All Hosts address.

They are broadcast to the subnet broadcast address.

They are multicast to the All Routers address.

They are broadcast or multicast, depending on the physical media.

To reduce the number of LDP sessions

To reduce the number of LIB and LFIB entries

To bypass the LDP exact prefix match rule

To export summarized routes from OSPF to LDP

The current DR is selected, if there is one. Otherwise, the router with the lowest priority is the DR. If priorities are the same, the DR is chosen based on the lowest RID.

The current DR is selected, if there is one. Otherwise, the router with the highest priority is the DR. If priorities are the same, the DR is chosen based on the highest RID.

The router with the lowest priority is the DR. If priorities are the same, the current DR is selected. Otherwise the DR is chosen based on the lowest RID.

The router with the highest priority is the DR. If priorities are the same, the current DR is selected. Otherwise the DR is chosen based on the highest RID.

Service ID

Customer ID

SAPID

VC-ID

SDPID

It supports traffic protection using IGP equal cost paths.

It supports CAC to prevent resource overbooking.

It supports LSPs with traffic engineering constraints.

It supports LSPs that follow the IGP best path.

Configure router static-route 2001:DB8:1:201::/64 indirect 10.10.10.4

Configure router static-route 2001:DB8:1:201:764 indirect 2001:DB8:1:200::2

Configure router static-route 2001:DB8:1:200::/56 indirect 10.10.10.4

Configure router static-route 2001:DB8:1:200:756 indirect 2001:DB8:1:200::2

Non-broadcast

Broadcast

Point-to-multipoint

Point-to-point

Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to R1 will follow (R7-R6-R4-R2-R1)

Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to R1 will follow (R7-R6-R5-R3-R1)

Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to R1 will follow (R7-R6-R4-R2-R1)

Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to R1 will follow (R7-R6-R5-R3-R1)

Area addresses TLV

Intermediate system neighbors

TLV Authentication information TLV

Intermediate system neighbors

TLV Area addresses

TLV LSP entries TLV

The IP internal reachability information

TLV Area Addresses

TLV Authentication Information TLV

The IP external reachability information

TLV Area addresses

TLV Intermediate system neighbors TLV

Router LSA

AS External LSA

Intra-Area Prefix LSA

Inter-Area Prefix LSA

Network LSA

None of the statements are correct.

DSCP marking

Class of Service Marking

DSAP marking

ICMP type

3

4

6

8

sap 1/1/1

sap 1/1/1:*.0

sap 1/1/1:0.*

1/1/1:0

Router R3 swaps both the RSVP-TE LSP label and LDP transport label received with new labels.

Router R3 swaps the VPN service label received with a new label.

Router R3 uses the same RSVP-TE LSP label as the one received from router R2.

Router R3 uses the same LDP transport label as the one received from router R2.

An IGP route takes priority over a transport tunnel.

Both LDP and RSVP-TE based tunnels can be used.

MPLS tunnels can be used to resolve the prefixes learned via IGP.

Multiple MPLS tunnels can be installed in the FIB.

The VPN label is signaled between PE devices using MP-BGP.

The VPN label is swapped at each P router as a packet crosses the service provider network.

The VPN label is also known as the inner label or service label.

The VPN label indicates which VPRN a packet should be sent to once it reaches the egress PE.

All of the above

Only C and D.

When an Alcatel-Lucent Service Router is rebooted, the mirror destination and mirror source must be re-configured

A mirror destination is shut down by default on an Alcatel-Lucent Service Router.

A mirror source is shut down by default on an Alcatel-Lucent Service Router.

When an Alcatel-Lucent Service Router is rebooted, the mirror destination must be re-configured.

When an Alcatel-Lucent Service Router is rebooted the mirror source must be re-configured.

configure ies 5 customer 1000 create

configure router ies 5 customer 1000 create

configure service ies 5 customer 1000 create

configure router ies 5 customer 1000

The vc-id on the mesh-sdp must be explicitly configured.

The vc-id on the mesh-sdp is automatically assigned by a PE using the service id.

The VPLS service id, on all PE routers, does not have to match.

The VPLS service id, on all PE routers, must match.

If dynamic signaling is required, the signaling on all PE routers must be set to TLDP in the configuration of the SDPs.

The signaling on all PE routers will default to TLDP in the configuration of the SDPs; therefore, no configuration change is required for dynamic signaling.

ERO is used by downstream routers to determine the next-hop for the LSP.

ERO contains label information used to signal an LSP path.

ERO is not always present in the PATH message.

Each downstream router updates information inside the ERO.

It provides the ability to establish connection oriented paths over a connectionless IP network.

It provides a mechanism to engineer network traffic patterns independently of IP routing tables.

It will work over most physical layer protocols.

It can use GRE tunnels to transport data from many different protocols over an IP network.

It is unidirectional.

It is bidirectional.

It must always have a secondary path.

It provides a specific tunnel for a FEC through the network.

It always follows the IGP best path.

The MTU does not match on both interfaces.

OSPF is not enabled on one of the routers.

The router ID is the same on both routers.

An OSPF Hello has not been received from the neighbor.

The interfaces are configured as point-to-point on one side and broadcast on the other.

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2

3

4

6

7

The OSPF internal preference

The IS-IS Level 1 internal preference

The IS-IS Level 2 internal preference

The OSPF external preference

The IS-IS Level 2 external preference

The IS-IS Level 1 external preference

Conservative label retention

Liberal label retention.

Downstream on demand.

Downstream unsolicited.

An IES requires a spoke SDP.

A virtual route table must be configured for an IES service.

An IES service must use static routes to communicate with customer networks.

An IES must have at least one SAP defined.

Only the mirror source must be re-configured.

Only the mirror destination must be re-configured.

Both the mirror destination and mirror source must be re-configured.

Neither the mirror destination nor the mirror source must be re-configured.

SDP

Network port

LSP

Service

RSVP

Configuring an autonomous system number in the global context.

Configuring a BGP group and peer parameters.

Configuring a VPN-IPv4 address family.

Configuring an export policy to advertise routes between PEs.

Dedicates a separate port for each customer.

Performs ARP look-ups for each service.

Maintains a different IP routing table for each service.

Maintains a different MAC Forwarding Database for each service.

Router R1 generates a type 5 LSA that is flooded through all OSPF areas.

Router R1 generates a type 7 LSA that is flooded through all OSPF areas.

Router R1 generates a type 5 LSA that is flooded through area 1. Router R2 generates a type 7 LSA that is flooded through areas 0 and 2.

Router R1 generates a type 7 LSA that is flooded through area 1. Router R3 generates a type 5 LSA that is flooded through areas 0 and 2.

Show isis neighbors

Show router isis neighbors

Show router isis adjacency

Show isis adjacency

224.0.0.5

224.0.0.6

224.0.0.9

224.0.0.10

RIPv2 does not have support for multicast

Isp retry-timer

Isp retry-limit

mpls resignal-timer

rsvp refresh-time

router rsvp keep-multiplier

CPM

MDA

Switch Fabric

IOM

TRUE

FALSE

As soon as the LSP is transmitted.

When an acknowledgment is received in the form of PSNP.

When an older LSP is received.

When a newer or same aged LSP is received.

Only when a newer LSP is received

The age for newly created link state information is set to 0 for OSPF and 1200 for IS-IS

The age for newly created link state information is set to 1200 for OSPF and 0 for IS-IS

The age is incremented or decremented as it is flooded from router to router and as it is held in the topological database.

The age is incremented or decremented only as it is held in the topological database and not as it is flooded router to router.

6VPE is a tunneling technology that makes use of MPLS tunnels to transport IPv6 information over an IPv4 MPLS infrastructure.

Customers connected to 6VPE could run native IPv6 or IPv4.

On the PE router, the next hop for a VPN IPv6 address is an IPv6 address, regardless of the nature of the network between the PEs.

6VPE requires an IPv6-aware MPLS core.

Both C and D are false.

All of the above statements are true.

Dot1Q

Q-in-Q

ATM

NULL

Nil

The time router R2 takes to receive a PATH Error message from router R4.

The time router R2 takes to find out a number of RSVP Hello messages have been missed.

The time router R2 takes to send a PATH Tear message to the head-end router.

The time router R2 takes to receive a PATH message from router R4 after a PATH refresh interval.

Router R4 swaps both the RSVP-TE LSP label and LDP transport label received with new labels,

Router R4 swaps the VPN service label received with a new label.

Router R4 uses the same RSVP-TE LSP label as the one received from router R3.

Router R4 uses the same LDP transport label as the one received from router R3.

Notification

Session

Discovery

Advertisement

The LSR regenerates and forwards a new PATH message.

The LSR stores the PATH message in the PSB.

The LSR forwards the PATH message based on the HOP object in the RSB.

The LSR looks up the PATH message's destination IP address in the FIB.

Route distinguishes are 12 bytes in length

Route distinguishes are appended to IPv4 prefixes to form 16 byte VPN-IFV1 prefixes.

Route distinguishes are used to determine which routes a VPRN should import.

CE routes must be configured with the proper route distinguishes for the VPRN they are associated to

All of the above statements are true.

All of the above statements are false.

Traffic is flooded to all SAPs in the service.

Traffic is flooded to all SAPs and spoke SDPs in the service.

Traffic is flooded to all SAPs and mesh SDPs in the service.

Traffic is flooded to all SAPs, spoke SDPs, and mesh SDPs in the service.

The traffic is not flooded.

The Hello protocol can speed up convergence without reducing refresh time.

Hello messages are sent after at least one RSVP session is active on the interface.

An interface with multiple RSVP sessions sends Hello messages for each session.

An RSVP neighbor is declared down if Hello messages are not received within the Hello timeout.

An OSPF adjacency can be established on an IES interface.

IES allows provider MP-BGP sessions to be extended to customers.

An IES service must use static routes in order to communicate with customer networks.

An IES interface supports OSPF and IS-IS in passive mode only.

Configure an autonomous system number in the global context.

Configure a BGP group and peer parameters.

Configure a VPN-IPv4 address family.

All of the above steps are mandatory.

None of the above steps are mandatory.

Label bindings are distributed to other routers when explicitly requested.

Label bindings are distributed to all neighbors including non-downstream routers.

Label bindings are distributed if labels have not been received from downstream routers.

All labels received from downstream neighbors are stored in the LIB.

Send a PathTear message towards router R6.

Send a PathTear message towards router R1.

Send a ResvTear message toward router R6.

Send a ResvTear message toward router R1.

Send a PATH Tear message toward router R6.

Send a PATH Tear message toward router R1.

Send a PATH Error message toward router R6.

Send a PATH Error message toward router R1.

TRUE

FALSE

1

4

6

8

12

24

IES

VPWS

VPLS

VPRN

L2TP

When a router receives updates from its neighbors, it adds them to its link state database, performs an SPF computation, and sends the results to its neighbors.

An SPF computation is done by each router to determine the best path to destination networks. All the best paths determined by the SPF calculation will be seen in the route table.

Each router constructs its own link state database with updates received from neighbors.

An SPF computation is done by each router to determine the best path to destination networks. All the best paths determined by the SPF calculation will be offered to the route table manager.

Option A

Option B

Option C

Option D

Option A

Option B

Option C

Option D

Router R1

Router R2

Routers R1 and R2

Router R4

They are type 7 within the area and are not modified at the ABR

They are type 5 within the area and converted to type 3 at the ABR

They are type 5 within the area and are not modified at the ABR

They are type 7 within the area and converted to type 5 at the ABR

Configuring IS-IS interfaces

Enabling IS-IS

Configuring level capabilities

Specifying an area address

The router with router ID 10.10.10.5 is an ASBR.

The router with router ID 10.10.10.3 is an ASBR.

The router with router ID 10.10.10.5 originated the AS summary LSA in its own area.

The router with router ID 10.10.10.4 is in the same area as the router with router ID 10.10.10.5.

Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routers

Routers R1, R2, and R4 are L1/L2 routers. Router R3 is an L1 router,

Routers R1, R2, and R3 are L2 routers. Router R4 is an L1 router,

Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers

Different authentication types are not possible because IS-IS only supports password authentication.

An adjacency will not be formed

The two routers negotiate the authentication type and then reach the up state.

Only an L2 adjacency will form, as long as both routers are L2 capable.

An L1/L2 router can have neighbors in different areas.

An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.

An L1/L2 router advertises its L2 routes to its L1 neighbors.

An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.

The router with the lowest priority is the DR.

The router with the highest priority is the DR.

If priorities are the same, the DR is chosen based on the lowest RID.

If priorities are the same, the DR is chosen based on the highest RID.

Neighbor, adjacency, route table

Neighbor, topology, forwarding

Topology, routing, forwarding

There are only two databases: adjacency and topology

A policy statement within the router identifying what is to be advertised

Access-lists denoting what is to be advertised

Default metrics for each link

A group and neighbor statement for each peer

The use of Broadcast messages in combination with Neighbor Advertisement messages.

The use of Anycast addresses in combination with Neighbor Advertisement messages.

The use of Solicited-node multicast addresses in combination with Neighbor Advertisement messages.

The use of Anycast addresses in combination with Link-Local Advertisement messages.

IGP-based LSPs are established solely from information contained in routing tables.

The constraint-based routed LSP is calculated at the ingress of the network, based on the router database and user defined constraints.

The constraint-based routed LSP is calculated at each hop of the LSP, based on the route table and user defined constraints.

IGP-based LSPs must use LDP signaling.

Add the "originate-default-route" option in the NSSA area configuration on router R3.

Add the "summaries" option to the NSSA area configuration on router R1.

Configure a static route on router R1 to 192.168.3.1.

Configure a default route on router R2.

Router R1

Router R2

Router R3

Router R4

Router R5

fe80::2416:4dff:fe16:b53d

fe80::2616:4dff:fe16:b53d

ff80::2416:4dff:fe 16:b53d

ff80::2616:4dff:fe 16:b53d

fd80::2416:4dff:fe16:b53d

10.10.10.2

10.10.10.3

10.10.10.4

10.10.10.6

There is no ASBR configured in the network.

Different authentication types are not possible because IS-IS only supports password authentication.

An adjacency will not be formed.

The two routers negotiate the authentication type and then reach the up state.

Only an L2 adjacency will form, as long as both routers are L2 capable.

Set the service MTU of the VPLS to match the IES MTU.

Set the ip-mtu of the IES to match the service MTU of the VPLS.

Set the SDP MTU of the IES to match the SDP MTU of the VPLS.

Set the MTU of the IES's network port to match the service MTU of the VPLS.

P router

LSR

eLER

iLER

PDU authentication.

The ability to customize the link cost metric.

Use of Bellman-Ford routing algorithm.

Classless routing.

Updates sent as layer 3 multicast.

193.45 32 0/20

193.45.0.0/21

192.45.32.0/21

192.45.0.0/20

Level 0

Level 1

Level 2

Level 0/1

Level 1/2

OSPFv3 uses MD5 Authentication.

Router LSAs carry IPv6 prefix information.

NSSA is supported in OSPFv3.

OSPFv3 uses a 64-bit router ID.

Router R2 needs a static route to the PC.

Router R2 needs a default to router R1.

Router R1 needs a default route to router R2.

The static route should use a next-hop of 172.31.1.2

OSPF internal preference and IS-IS Level 1 internal preference.

OSPF internal preference and IS-IS Level 1 external preference.

OSPF external preference and IS-IS Level 1 internal preference.

OSPF external preference and IS-IS Level 2 internal preference.

OSPF external preference and IS-IS Level 1 external preference.

A PUSH label stack operation must be performed.

The outgoing interface and next-hop address will be determined from the FIB.

The packet can be forwarded as a labeled or unlabeled packet.

A POP label stack operation may be performed.

Node protection tunnels detour around a failed next downstream router.

Node protection tunnels can only be requested for a primary LSP path.

Node protection tunnels are only used by one-to-one Fast Reroute.

Link protection tunnels are established if a router is unable to establish node protection tunnels.

Tunnel Label

VC Label

Operational Control Word

VPI

VCI

Each router requires 1 SDP.

Each router requires 2 SDPs.

Each router requires 3 SDPs.

Each router requires 6 SDPs.

1520

1540

1548

1556

6VPE is a tunneling technology that makes use of MPLS tunnels to transport IPv6 information over an IPv4 MPLS infrastructure.

Customers connected to 6VPE could run native IPv6 or IPv4.

On the PE router, the next hop for a VPN IPv6 address is an IPv6 address, regardless of the nature of the network between the PEs.

6VPE requires an IPv6-aware MPLS core.

Both C and D are false.

All of the above statements are true.

A mirror source with a defined source type.

A mirror source defined with an SDP destination.

A mirror destination with a SAP defined.

A mirror destination and a mirror source with the same service ID.

6VPE is a tunneling technology that makes use of MPLS tunnels to transport IPv6 prefixes over an IPv4 infrastructure.

Customers connected to 6VPE can run IPv6 or IPv4.

On a PE router, if the MP-BGP next hop is an IPv4 address, a mapped IPv6-compliant address will be used.

6VPE implements its own VPN-IPv6 address family and is a replacement for MP-BGP.

A VPLS service does not use an FDB.

The router reads the destination MAC address of packets passing through the service.

The router reads the source MAC address of packets passing through the service.

The router uses reverse ARP (RARP) to resolve the MAC addresses for unknown destinations.

The router is programmed with MAC addresses by the network administrator.

The E-pipe can support a maximum MTU size of 1578.

The ports of the link PE2-PE3 have an MTU of 1578.

An svc-ping of the E-pipe will succeed.

If the step size was 2, the maximum response size would be the same.