4A0-101 Nokia Interior Routing Protocols Questions and Answers

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

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

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

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

R1 has one IS-IS adjacency and one LSP.

R1 has one IS-IS adjacency and two LSPs.

R1 has one IS-IS adjacency and four LSPs.

R1 has two IS-IS-adjacencies and two LSPs

R1 has two IS-IS adjacencies and four LSPs

Router R3 will install the IS-IS route in it's routing table.

Router R3 will install the OSPF route in it's routing table.

Router R3 will install an OSPF route and an IS-IS route in it's route table.

There is not enough information to answer the question.

Next Header

Traffic Class

Hop Limit

Fragment Offset

Flow Label

FE80::203:FAFF:FEAC:77AF/64

2000::203:FAFFFEAC:77AF/64

FE80::3FAFF:FEAC:77AF/64

FC00::203:FAFF:FEAC:77AF/64

FC00::3:FAFF:FEAC:77AF/64

It discards packets based on the source address.

It discards packets that match the destination prefix.

It returns ICMP unreachable messages.

It discards packets based on the egress port.

A route from IS-IS.

A route from OSPF.

A floating static route.

A static route.

CSNPs are used to maintain consistency in the Link-State database.

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

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

The CSNP lists the LSPs in the router's database

Configure IS-IS interfaces

Enable IS-IS

Configure level capabilities

Specify an area address

Routers R1 and R2 are in different areas.

Routers R1 and R2 are in the same area.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is point-to-point.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is broadcast.

Routers R1 and R2 will send a Level 1/2 Hello PDU if the interface type between them is broadcast.

The term backbone router has the same definition as the term area border router.

An OSPF network needs at least one area border router to function.

Area border routers connect the backbone area to other areas in an OSPF network.

By definition, an area border router must perform route summarization between areas.

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

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

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

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

Option A

Option B

Option C

Option D

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

Source IP address

TCP source port

Prefix list

Protocol type

Router R1 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.

Router R3 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.

Router R3 generates a Type 4 LSA that is flooded to areas 0 and 2.

Router R3 generates a Type 4 LSA that is flooded to area 0, and router R6 generates a Type 4 LSA that is flooded to area 2.

193.45 32 0/20

193.45.0.0/21

192.45.32.0/21

192.45.0.0/20

Exchange

Up

Down

2-Way

IPv4 In-Band Management

IPv6 Routing

IPv4 Multicast Routing

IPv6 Multicast Routing

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

An OSPF database description packet has not been received from the neighbor.

The interface facing the neighbor is down.

The interface is included in a different area than the neighbor router.

The router has not received a valid OSPF Hello packet from its neighbor.

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.

The router must receive an acknowledgment

The router must receive a Hello

The router must receive a new sequence number

The router must receive a Link State Packet

Show route-table

Show router routing-table

Show router route-table

Show static

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

A OSPF Hello has not been received from the neighbor

No protocol extensions required

Only supported by OSPF and IS-IS

Transparent to routing neighbors

Uses Graceful Restart to inter-operate with other vendors

There is no such calculation in IS-IS

Show router isis database

Show router isis dijykstra

Show router isis spf

Router LSA

Network LSA

Summary Network LSA

Summary Router LSA

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

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.

The router must also have an active static route to the next-hop specified in the static route command.

The system address of the next-hop router must be included in the static route command.

The command option "indirect" must be used in the static-route command.

The system address of the router connected to the destination must be included in the static route command

When link-state information reaches the maximum age on a router, the router will flood that information to its neighbors.

When a router detects that any of its link-state information has reached the maximum age, it will request a new update from the source router.

Aging helps ensure that links, which are no longer part of the topology, will eventually get removed from the LSDB.

The age value is updated as the information is flooded throughout the network and when it is in the LSDB.

Type 1 Router LSA

Type 2 Network LS A

Type 3 Summary LSA

Type 5 External LSA

Challenge handshake authentication protocol (CHAP)

Two factor authentication

MD5 authentication

Extensible authentication protocol (EAP)

Type 1 Router LSA

Type 2 Network LSA

Type 3 Summary LSA

Type 4 ASBR LSA

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.

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.

Down

Initializing

2-way

Full

Intra-Area Prefix LSA

Router LSA

AS External LSA

NSSA LSA

config> static-route 0.0.0.0/0 next-hop 10.1.2.2

config>router> static-route 0.0.0.0 255.255.255.255 next-hop 10.1.2.1

config>router> static-route 0.0.0.0/0 next-hop 10.1.2.2

config>router> static-route 0.0.0.0/0 next-hop 10.1.2.1

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 R6 will have a single Router LSA that describes the summary prefix.

Router R6 will have three Router LSAs - one to describe each loopback prefix.

Router R6 will have a single Inter-Area Prefix LSA to describe the summary prefix.

Router R6 will have three Inter-Area Prefix LSAs - one to describe each loopback prefix.

Router R6 will not have any LSAs to describe the loopback prefix or the summarized prefix.

2

3

4

5

6

7

The head office has a default route and the branch office has a specific static route.

The head office and the branch offices both have specific static routes.

The head office and the branch office both have default routes.

The head office has a specific static route and the branch office has a default route