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4A0-101 Exam Dumps - Nokia Interior Routing Protocols

Question # 4

Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. One of the routers is the DIS. How many adjacencies will be formed between them?

A.

None

B.

1

C.

2

D.

3

E.

4

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Question # 5

A router receives an OSPF database description packet from a neighbor that references an LSA, which is already in the router's LSDB. The sequence number in the DBD packet is lower than the sequence number of the LSA in the LSDB.

What action does the router take?

A.

The router sends a link-state update to its neighbor.

B.

The router sends a link-state acknowledgement to its neighbor.

C.

The router updates the information in its LSDB with the information received from its neighbor.

D.

The router sends a link-state request to its neighbor.

E.

The router takes no action.

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Question # 6

What is another term to describe the default route for a client?

A.

Black hole

B.

Default gateway

C.

Gateway path

D.

Proxy ARP

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Question # 7

Which part of the NSAP address is used to indicate to the end system that a packet is to be processed by the router itself?

A.

AFI

B.

IDI

C.

HO-DSP

D.

NSEL

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Question # 8

When multiple routing protocols offer a route for the same prefix, what part of the router is in charge of deciding which route to make active?

A.

The routing information base (RIB).

B.

The routing table manager (RTM).

C.

The equal cost multipath configuration (ECMP).

D.

The forwarding information base (FIB).

E.

The link state database (LSDB).

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Question # 9

What is the source IP address in an OSPF update?

A.

224.0.0.5

B.

224.0.0.6

C.

The unicast IP address of the interface the update is sent on

D.

The system address of the router.

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Question # 10

A router sets the E bit in the flags of its Type 1 LSA. What does this indicate?

A.

The router is an ABR.

B.

The router is an ASBR.

C.

The router is at the end of a virtual link.

D.

The router's interface is in a stub area.

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Question # 11

Click the exhibit button.

If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 will receive two routes to 192.168.3.0/24. What will be the preference of these two routes? Assume that all IS-IS routers are L1/L2 capable and are in the same area. Choose two answers.

A.

The OSPF internal preference

B.

The IS-IS Level 1 internal preference

C.

The IS-IS Level 2 internal preference

D.

The OSPF external preference

E.

The IS-IS Level 2 external preference

F.

The IS-IS Level 1 external preference

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Question # 12

A static route is created using the command "static-route 0.0.0.0/0 next-hop 3.3.3.1". What command could be used to test the static route on an Alcatel-Lucent 7750 SR?

A.

Ping static 3.3.3.1

B.

Ping static 0.0.0.0/0

C.

Ping 3.3.3.1

D.

Ping 0.0.0.0

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Question # 13

From the list below select the statements that describe the behavior of link state information aging. (Choose 2)

A.

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

B.

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

C.

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

D.

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

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Question # 14

What is the metric and maximum routable value for RIP?

A.

Hop count and 16

B.

Hop count and 15

C.

Link cost and 15

D.

Link cost and 16

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Question # 15

Which of the following statements regarding OSPF routing updates on a multi-access network segment is true?

A.

In multi-access networks, a DR and BDR are elected only if there are more than two routers connected to the network segment.

B.

In multi-access networks, a DR and BDR are elected only if the subnet masks on the router interfaces are less than /30

C.

In multi-access networks, a DR and BDR are elected. To ensure resiliency, both the DR and BDR send link-state advertisements describing the network.

D.

In multi-access networks, a DR and BDR are elected. The DR sends link-state advertisements describing the network.

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Question # 16

When redistributing OSPF into RIP V2 what must be taken into consideration for the redistribution to take place?

A.

The metric must be set accordingly for RIP

B.

The subnet mask must be removed from the OSPF route

C.

You must divide the cost of the OSPF route by three

D.

The router must be configured as an ASBR

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Question # 17

When configuring a filter, where should the most explicit entries be placed?

A.

At the bottom

B.

In the middle

C.

At the top

D.

It does not matter where they are placed.

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Question # 18

Which of the following correctly describes an IPV6 header compared to an IPv4 header?

A.

The IPv6 header has a header checksum field, header length field and no fragmentation offset field.

B.

The IPv6 header has no header checksum field, no header length field and does have a fragmentation offset field.

C.

The IPv6 header has a header checksum field, no header length field and no fragmentation offset field.

D.

The IPv6 header has no header checksum field, no header length field and no fragmentation offset field.

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Question # 19

Which of the following best describes a unicast IPv6 address?

A.

Fixed total of 128 bits, where 64 bits are used for routing and 64 bits are used as an interface identifier.

B.

Fixed total of 128 bits, where 32 bits are used for the global prefix, 32 bits are used for the subnet and 64 bits are used as an interface identifier.

C.

Variable total length, where at least 48 bits are used for the global prefix, 48 bits are used for the subnet and 64 bits are used as an interface identifier.

D.

Variable total length, where at least 64 bits are used for routing and 64 bits are used as an interface identifier

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Question # 20

Click on the exhibit.

The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers.

After IPv6 has been configured, which of the following is TRUE?

A.

Router R2 has two IS-IS-adjacencies and two LSPs.

B.

Router R2 has two IS-IS-adjacencies and four LSPs.

C.

Router R2 has two IS-IS-adjacencies and three LSPs.

D.

Router R2 has four IS-IS-adjacencies and six LSPs.

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Question # 21

Click on the exhibit.

Which of the following would you expect to see in router R4's OSPF database?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 22

A new router is added to a broadcast network. What is used by IS-IS as the tie breaker for selecting the DIS if the priorities are the same?

A.

The router with the highest system ID.

B.

The router with the highest loopback address.

C.

The Hello packet with the highest sequence number.

D.

The existing DIS remains the DIS.

E.

The router with the highest interface MAC address.

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Question # 23

What is the replacement for ARP in IPv6?

A.

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

B.

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

C.

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

D.

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

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Question # 24

How many databases does a Link State routing protocol use?

A.

One

B.

Two

C.

Three

D.

Four

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Question # 25

What acts as the tie breaker on an Alcatel-Lucent 7750 SR if the priorities are the same when IS-IS is electing a DIS?

A.

The system ID

B.

The loopback address

C.

The sequence number of the hello packet

D.

The device that first initiated communication becomes the DIS

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Question # 26

What command is used on the Alcatel-Lucent 7750 SR to define the default action to be taken if a packet does not match any entry in an IP filter?

A.

config>filter# default-action XXX

B.

config>filter>ip-filter# default-action XXX

C.

config>filter# default-mode XXX

D.

config>filter>ip-filter# default-mode XXX

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Question # 27

What value should the AFI be set to for locally administered addressing?

A.

1

B.

49

C.

83

D.

0

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Question # 28

How does an IS-IS router acknowledge the receipt of an IS-IS LSP on a point-to-point link?

A.

They are explicitly acknowledged by sending a CSNP to the sender identifying the LSP.

B.

They are implicitly acknowledged as a part of the link-state database synchronization and maintenance procedures.

C.

They are explicitly acknowledged by sending a PSNP to the sender identifying the LSP.

D.

They are implicitly acknowledged by the DIS multicast of CSNPs.

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Question # 29

In an IS-IS network, why does the DIS create a pseudo-node?

A.

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

B.

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

C.

It represents a broadcast sub-network.

D.

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

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Question # 30

Click on the exhibit.

Which of the following best describes the format of data traffic sent to the server as it exits from the PC?

A.

The destination IP address will be the system IP address of router R1 and the destination MAC address will be the MAC address of the router R1 port connected to the PC.

B.

The destination IP address will be the IP address of the router R1 port connected to the PC and the destination MAC address will be the MAC address of the router R1 port connected to the PC.

C.

The destination IP address will be the IP address of the server and the destination MAC address will be the MAC address of the server.

D.

The destination IP address will be the IP address of the server and the destination MAC address will be the MAC address of the router R1 port connected to the PC.

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Question # 31

How is the DR selected when an OSPF router is added to a broadcast network?

A.

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.

B.

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.

C.

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.

D.

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.

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Question # 32

Which type of OSPF LSA lists the routers attached to a broadcast network?

A.

Type 1

B.

Type 2

C.

Type 3

D.

Type 4

E.

Type 5

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Question # 33

In an OSPF network, which of the following is NOT a result of manual summarization on an ABR?

A.

It can reduce the topological database size.

B.

It can reduce the size of the route table.

C.

It can reduce the number of Summary LSAs.

D.

It can reduce the number of Router LSAs.

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Question # 34

An Alcatel-Lucent 7750 SR is configured with an export policy to redistribute a loopback prefix into OSPFv3.

What type of LSA advertises the prefix to the other OSPFv3 routers in the same area?

A.

Router LSA

B.

AS External LSA

C.

Intra-Area Prefix LSA

D.

Inter-Area Prefix LSA

E.

Network LSA

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Question # 35

Click on the exhibit.

Router R2 uses IS-IS to advertise the network 192.168.3.0/24 to R1. How can router R1 discard the route?

A.

Use an import policy and a prefix list on router R2.

B.

Use an export policy and a prefix list on router R1.

C.

Use an import policy and a prefix list on router R1.

D.

Router R1 cannot discard the route because IS-IS does not support import policies.

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Question # 36

Click on the exhibit.

Before the link failure, all routers have operational OSPF adjacencies between them and there is a BFD session between routers R1 and R3.

After the link failure, which of the following affects the IGP convergence time?

A.

The convergence time depends on the value of the OSPF hello timers on routers R1 andR3.

B.

The convergence time depends on the value of the OSPF hello timers and Dead interval on routers R1 and R3.

C.

The convergence time depends on the value of the BFD interval and multiplier settings on routers R1 andR3.

D.

The convergence time depends on the time taken by the switches to detect the link failure.

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Question # 37

Click on the exhibit.

An OSPFv3 router is attached to a non-OSPF domain that includes networks 2001:DB8:8::/64.2001 .DB8:9::/64 and 2001 :DB8:A::/64. Other routers in the OSPF domain see the prefix 2001, DB8:8::/64, but not the other two prefixes.

What could cause this?

A.

The router is not configured as an asbr.

B.

The router is not configured as an NSSA.

C.

The export policy is not applied to OSPFv3.

D.

The prefix list should be 2001:DB8:8::/46

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Question # 38

Click the exhibit button.

The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in?

A.

The adjacency state is two way because both routers have received a database description packet.

B.

The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets.

C.

The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.

D.

The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.

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Question # 39

Which of the following cannot be used as a matching criterion in route policy statements?

A.

Source IP address

B.

TCP source port

C.

Prefix list

D.

Protocol type

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Question # 40

An Alcatel-Lucent 7750 SR receives a route via an IS-IS LSP with internal reach ability, and receives the same route via an OSPF type 5 LSA. If al protocol preferences are default, which route will be installed in the route table?

A.

The route learned via IS-IS will be installed.

B.

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

C.

Both routes will be installed, if ECMP is enabled.

D.

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

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Question # 41

When a router receives an IP packet, but does not find a match in the routing table for the destination IP address, what actions are performed by the router?

A.

The packet is flooded out all router interfaces.

B.

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

C.

The packet is silently discarded.

D.

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

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Question # 42

Which of the following conditions will prevent an OSPF adjacency from reaching the full state? Choose three answers.

A.

MTU mismatch

B.

Incorrect subnet mask

C.

System interface not included in OSPF

D.

Area ID not the same

E.

Different metric set on each end of the link

F.

Router ID not defined

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Question # 43

Which of the following OSPF area types are supported by the Alcatel- Lucent 7750 SR? Choose two answers.

A.

Not so stubby areas

B.

Level1 area WC

C.

Stub areas

D.

Partially stubby areas

E.

Level 2 areas

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Question # 44

Click the exhibit button.

Given the topology and the show commands, and assuming that router R2 advertises all of its loopbacks into OSPF, what is the correct router R1 configuration?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 45

Which of the following statements regarding the IS-IS CSNP is false?

A.

CSNPs are used to maintain consistency in the link state database.

B.

CSNPs are advertised before an adjacency is formed with another router.

C.

There are two types of CSNPs: Level 1 and Level 2.

D.

CSNPs are advertised after an adjacency is formed with another router.

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Question # 46

Which of the following statements describe the major features of OSPF? Choose two answers.

A.

Fast reroute capability

B.

Control traffic prioritization

C.

Route redistribution

D.

Traffic engineering extensions

E.

Cut through forwarding

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Question # 47

Click the exhibit button.

What is the command to configure a static route on the Alcatel-Lucent 7750 SR router R1 to reach the network behind router R2?

A.

configure router static-route 139.120.121.0/24 next-hop 138.120.199.2

B.

configure router static-route 139.120.121.0/24 next-hop 138.120.199.1

C.

configure router static-route 138.120.199.2/24 next-hop 138.120.199.1

D.

configure router static-route 139.120.121.0/24 next-hop 139.120.121.2

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