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Nokia Interior Routing Protocols Question and Answers

Nokia Interior Routing Protocols

Last Update May 9, 2024
Total Questions : 315

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Questions 1

Which of the following is a feature of a black-hole static route?

Options:

A.  

It discards packets based on the source address.

B.  

It discards packets that match the destination prefix.

C.  

It returns ICMP unreachable messages.

D.  

It discards packets based on the egress port.

Discussion 0
Questions 2

Which of the following are major features of OSPF? (Choose 2.)

Options:

A.  

Fast reroute capability.

B.  

Control traffic prioritization.

C.  

Route redistribution.

D.  

Traffic engineering extensions.

E.  

Cut through forwarding.

Discussion 0
Questions 3

Which of the following is FALSE about the databases used by a link-state routing protocol in a single area routing domain?

Options:

A.  

The link-state database has local topology information from all the routers.

B.  

The adjacency database contains all the links between all the routers.

C.  

The forwarding database contains the next hop for all known prefixes.

D.  

The link-state database is the same for all routers.

Discussion 0
Questions 4

Which of the following best describes the features of Classless Inter-Domain Routing (CIDR)?

Options:

A.  

Automatic summarization and the use of IP addresses that use any number of bits for the network portion of the address.

B.  

Manual summarization and the use of IP addresses that use any number of bits for the network portion of the address.

C.  

Automatic summarization and the use of IP addresses that use a fixed number of bits for the network portion of the address.

D.  

Manual summarization and the use of IP addresses that use a fixed number of bits for the network portion of the address.

Discussion 0
Questions 5

Which of the following is a valid IPv6 address equivalent to 2001:0da8:0000:0000:0024:0000:4ab9:0300?

Options:

A.  

2001:0da8:::0024:0000:4ab9:03

B.  

2001:0da8::0024::4ab9:0300

C.  

2001:da8::24::4ab9:300

D.  

2001:da8::24:0:4ab9:300

Discussion 0
Questions 6

Click on the exhibit.

Given the contents of the Router LSA, which of the following best describes the local topology of the router?

Options:

A.  

The router has a system interface, one point-to-point interface and one virtual link.

B.  

The router has a system interface, one passive interface, one point-to-point interface and one virtual link.

C.  

The router has a system interface, one point-to-point interface and one broadcast interface.

D.  

The router has a system interface, one passive interface, one point-to-point interface and one broadcast interface.

Discussion 0
Questions 7

Click on the exhibit.

Examine the physical topology of the IS-IS network, the metrics of the links and the levels of the routers. All routers have a system address included in IS-IS.

Which of the following describes the route that router R4 will use to reach the system address of router R6?

Options:

A.  

Router R4 will have a route to router R6's system address with router R2 as the next-hop.

B.  

Router R4 will have a default route with router R2 as the next-hop.

C.  

Router R4 will have a default route with router R3 as the next-hop.

D.  

Router R4 will not have a route to router R6's system address, nor will it have a default route.

Discussion 0
Questions 8

Which of the following statements regarding IS-IS Hello packets are true? Choose two answers.

Options:

A.  

Different types of Hello packets are exchanged on point-to-point networks than on broadcast networks.

B.  

L1/L2 Hello packets are exchanged on broadcast links.

C.  

Different L1 and L2 Hello packets are exchanged on broadcast links.

D.  

By default, Hello packets are sent every 5 seconds, and the timeout to declare a neighbor down is 15 seconds.

Discussion 0
Questions 9

Which of the following types of networks are supported on an Alcatel-Lucent 7750 SR for OSPF? Choose two answers.

Options:

A.  

Broadcast

B.  

Non-broadcast multi-access

C.  

Point-to-point

D.  

Point-to-multipoint

Discussion 0
Questions 10

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

Options:

A.  

1

B.  

49

C.  

47

D.  

45

E.  

39

Discussion 0
Questions 11

In an OSPF Hello packet, which of the following fields must match for all neighbor routers on the segment? Choose three answers.

Options:

A.  

Area ID W B.

B.  

Hello and Dead intervals PC.

C.  

Stub flag

D.  

Checksum values

E.  

The list of neighbors

Discussion 0
Questions 12

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

Options:

A.  

None

B.  

1

C.  

2

D.  

3

E.  

4

Discussion 0
Questions 13

What are the ways the RID can be created on an Alcatel-Lucent 7750 SR router? (Choose three)

Options:

A.  

From the last 32 bits of the chassis MAC address

B.  

From the first 32 bits of the chassis MAC address

C.  

The loopback IP address

D.  

By using the command "config router ospf rid X.X.X.X"

E.  

From the system IP address

F.  

From the highest interface IP address

Discussion 0
Questions 14

Identify two attributes of Distance Vector Protocols: (Choose two)

Options:

A.  

Use split horizon by default.

B.  

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

C.  

Use holddown timers when topologies change to allow for convergence.

D.  

Maintain multiple databases: neighbor, topology and routing.

Discussion 0
Questions 15

An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What action is taken by the router?

Options:

A.  

The link state information is not populated in the database but is forwarded to all neighbors

B.  

The link state information already in the database is overwritten and the age is reset

C.  

The link state information is not populated in the database and an acknowledgement is sent

D.  

The link state information is regarded as old and nothing is done.

Discussion 0
Questions 16

Which one of the commands below will create a static route to network 2.3.4.0/24 on the AlcatelLucent 7750 SR router?

Options:

A.  

Static route 2.3.4.0 255.255.255.0 next hop 3.4.5.6

B.  

Static-route next-hop 3.4.5.6 2.3.4.0/24

C.  

Static route 2.3.4.0/24 next hop 3.4.5.6

D.  

Static-route 2.3.4.0/24 next-hop 3.4.5.6

Discussion 0
Questions 17

In which of the following types of areas does an OSPF router not set the E bit in its Type 1 LSA?

Options:

A.  

Not so stubby area

B.  

Stub area

C.  

Backbone area

D.  

Normal area

Discussion 0
Questions 18

Which of the following statements regarding IS-IS LSPs is true?

Options:

A.  

There are three types of LSPs: L1, L2 and L1/L2.

B.  

An LSP packet contains the ATT bits and the IS-type bits.

C.  

The lower the LSP sequence number, the more current the update.

D.  

Separate databases are maintained for L1 „ L2, and L1/L2 LSPs.

Discussion 0
Questions 19

Which of the following is an optional parameter when configuring IS-IS protocol on a router?

Options:

A.  

Configure IS-IS interfaces

B.  

Enable IS-IS

C.  

Configure level capabilities

D.  

Specify an area address

Discussion 0
Questions 20

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

Options:

A.  

Source IP address

B.  

TCP source port

C.  

Prefix list

D.  

Protocol type

Discussion 0
Questions 21

Click the exhibit button.

A static route is created on router R1 "using the "static-route 0.0.0.0/0 next-hop 10.3.3.2" command. What command can be used to test the static route on an Alcatel-Lucent 7750 SR?

Options:

A.  

ping static 10.5.5.5

B.  

ping static 0.0.0.0/0

C.  

ping 10.5.5.5

D.  

ping 0.0.0.0

Discussion 0
Questions 22

Click the exhibit button.

Given the topology and the route-tables shown, which of the following is most likely to be the configuration on router R1?

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Questions 23

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

Options:

A.  

L1 and L2 routers elect separate DIS's.

B.  

DIS uses multicast address 0180x200:0015 to communicate with other routers on the broadcast network.

C.  

If a new router starts up in a LAN and has a higher interface priority, the new router preempts the original DIS and becomes the DIS.

D.  

In broadcast multi-access networks, such as Ethernet, a single router is elected as the DIS. There is no backup DIS

Discussion 0
Questions 24

Which of the following is optional when configuring IS-IS on the Alcatel-Lucent 7750 SR?

Options:

A.  

Configuring IS-IS interfaces

B.  

Enabling IS-IS

C.  

Configuring level capabilities

D.  

Specifying an area address

Discussion 0
Questions 25

Which of the following statements regarding link state protocols are true? (Choose two)

Options:

A.  

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.

B.  

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.

C.  

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

D.  

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.

Discussion 0
Questions 26

An interface has a MAC address of 24-16-4d-16-b5-3d. What link-local address will be assigned to this interface?

Options:

A.  

fe80::2416:4dff:fe16:b53d

B.  

fe80::2616:4dff:fe16:b53d

C.  

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

D.  

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

E.  

fd80::2416:4dff:fe16:b53d

Discussion 0
Questions 27

Refer to the exhibit below. IS-IS IPv6 routing is configured in the network with globally routed addresses as shown. How many routes will R4 have in its IPv6 route table?

Options:

A.  

1

B.  

2

C.  

3

D.  

4

E.  

6

F.  

7

Discussion 0
Questions 28

Refer to the exhibit below.

R1 distributes its loopbacks into IS-IS and globally routed addresses are configured as shown. How many routes will R4 have in its IPv6 route table?

Options:

A.  

1

B.  

2

C.  

3

D.  

4

E.  

6

F.  

7

Discussion 0
Questions 29

How can a router ID be created on an Alcatel-Lucent 7750 SR router? Choose three answers

Options:

A.  

From the least significant 32 bits of the chassis MAC address.

B.  

From the most significant 32 bits of the chassis MAC address.

C.  

From the loopback IP address.

D.  

By using the command "config router router-id X.X.X.X"

E.  

From the system IP address.

F.  

From the highest interface IP address.

Discussion 0
Questions 30

Which of the following is not one of the MT topologies defined for IS-IS?

Options:

A.  

IPv4 In-Band Management

B.  

IPv6 Routing

C.  

IPv4 Multicast Routing

D.  

IPv6 Multicast Routing

E.  

All of the above are MT topologies defined for IS-IS.

Discussion 0
Questions 31

What is the primary purpose of variable length subnet masks (VLSM)?

Options:

A.  

To reduce the size of each routing update.

B.  

To allow interoperability between routing protocols.

C.  

To allow different subnet masks for different subnets.

D.  

To reduce the size of the routing table.

Discussion 0
Questions 32

Which of the following is NOT a characteristic of a floating static route?

Options:

A.  

The primary and backup routes are to the same destination.

B.  

The primary and backup routes appear in the routing table.

C.  

The backup route is configured with a higher preference value.

D.  

The next-hop of the primary and backup routes are different.

Discussion 0
Questions 33

Which function or component of the Alcatel-Lucent 7750 SR is in charge of supporting dynamic routing protocols and constructing the routing table?

Options:

A.  

IOM

B.  

CPM

C.  

FIB

D.  

SPF

Discussion 0
Questions 34

Click on the exhibit.

What type of OSPFv3 LSA is shown?

Options:

A.  

Router LSA

B.  

Network LSA

C.  

Intra-Area Prefix LSA

D.  

Link LSA

Discussion 0
Questions 35

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?

Options:

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.

Discussion 0
Questions 36

Click on the exhibit.

All ports in the network are operationally up and have a speed of 1Gbps.

Which of the following is TRUE?

Options:

A.  

Data traffic from network 192.168.1.0/24 to 192.168.3.0/24 will be forwarded through router R2.

B.  

Data traffic from network 192.168.3.0/24 to 192.168.1.0/24 will be forwarded through router R2.

C.  

The system interface of routers R1 and R3 must be included into OSPF for traffic to flow between the 192.168.1.0/24 and 192.168.3.0/24 networks.

D.  

The OSPF adjacency between router R1 and router R3 is operationally down.

Discussion 0
Questions 37

Which OSPFv3 LSA type is similar in function to the OSPFv2 Type 4 LSA?

Options:

A.  

Link

B.  

Intra-Area Prefix

C.  

Inter-Area Prefix

D.  

Inter-Area Router

Discussion 0
Questions 38

What is the replacement for ARP in IPv6?

Options:

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.

Discussion 0
Questions 39

Which of the following is not included in a Router LSA?

Options:

A.  

Operationally down interfaces in OSPF

B.  

Fully adjacent virtual links

C.  

Waiting state broadcast links

D.  

Fully adjacent point-to-point links

E.  

Loopback Interfaces in OSPF

Discussion 0
Questions 40

Click on the exhibit.

If router R2 re-distributes the IS-IS route 192.168.3.0/24 into OSPF, router R3 will receive two routes to 192.168.3.0/24. Assume that all IS-IS routers are L1/L2 capable and are in the same area.

Which of the following is TRUE?

Options:

A.  

Router R3 will install the OSPF route in its routing table.

B.  

Router R3 will install the IS-IS route in its routing table

C.  

Router R3 will install an OSPF route and an IS-IS route in its routing table.

D.  

There is not enough information to answer the question.

Discussion 0
Questions 41

How many bytes make up the system ID in an IS-IS NSAP address on the Alcatel-Lucent 7750 SR?

Options:

A.  

4 bytes

B.  

6 bytes

C.  

8 bytes

D.  

Variably between 4 and 8 bytes

Discussion 0
Questions 42

What is the term used for the updates sent by IS-IS?

Options:

A.  

Link State PDUs

B.  

Link State Updates

C.  

Link State Advertisements

D.  

Intermediate System Update Packets

Discussion 0
Questions 43

In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3)

Options:

A.  

Area ID

B.  

Hello and Dead Intervals

C.  

Stub flag

D.  

DR and BDR addresses

E.  

The list of neighbors

Discussion 0
Questions 44

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

Options:

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.

Discussion 0
Questions 45

If a Router originates a type 1 router LSA with the E bit set what types of areas can it belong to? Select all that apply.

Options:

A.  

Not So Stubby Area

B.  

Stub Area

C.  

Backbone Area

D.  

Standard Area

Discussion 0
Questions 46

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.

Options:

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

Discussion 0
Questions 47

What are the three databases maintained by a Link State Protocol?

Options:

A.  

Neighbor, adjacency, route table

B.  

Neighbor, topology, forwarding

C.  

Topology, routing, forwarding

D.  

There are only two databases: adjacency and topology

Discussion 0
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