4A0-101 Nokia Interior Routing Protocols Questions and Answers

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Manual route summarization can only be done on autonomous system border routers.

Manual route summarization must be done on all the backbone routers to be effective. Manual route summarization is optional on the routers in non-backbone areas.

Manual route summarization is done on the ABRs. By default, automatic summarization is done; however, it may not be optimal for all networks.

Manual route summarization is done on the ABRs. By default, no route summarization is done and all routes are advertised to all areas.

An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization is configured.

An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization is configured.

An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes.

An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors outside the area.

When two areas need to communicate and there is no area 0.

When an area needs to traverse another area to reach area 0.

When two areas are connected to area 0, but there is no direct path between them.

When an area needs to connect directly to another area without using area 0.

Non-broadcast

Broadcast

Point-to-multipoint

Point-to-point

The corporate head office router will have a default route and the branch site will have a more specific static route.

The corporate head office router and the branch office router will both have specific static routes.

The corporate head office router and the branch router will both have default routes.

The corporate head office router will have a more specific static route and the branch office router will have a default route.

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Router LSA

AS External LSA

Intra-Area Prefix LSA

Inter-Area Prefix LSA

Network LSA

None of the statements are correct.

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

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

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

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

IPv4 In-Band Management

IPv6 Routing

IPv4 Multicast Routing

IPv6 Multicast Routing

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

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.

IPv6 uses the Address Resolution Protocol to resolve the address to a MAC address.

A Neighbor Discovery message is sent to the broadcast MAC address. The host with the IPv6 address responds with a Neighbor Advertisement message.

A Neighbor Discovery message is sent to the solicited-node multicast address. The host with the IPv6 address responds with a Neighbor Advertisement message.

A Neighbor Discovery message is sent to the anycast address for the LAN. The host with the IPv6 address responds with a Neighbor Advertisement message.

IPv6 addresses do not need to be resolved to a MAC address.

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

A Type 4 LSA is originated by an ABR to describe a route to an ASBR to routers outside the area.

A Type 4 LSA is originated by an ASBR to describe a route to itself to routers outside the area.

A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the backbone area to provide routing information.

A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the stub area to provide routing information.

The system ID

The loopback address

The sequence number of the Hello packet

The device that first initiated communication becomes the DIS

The highest interface MAC address

The route policy should be applied as in import policy

The no-redistribute-external command is used on router R1

The route policy is incorrect. It should say "from protocol ISIS" rather than "from protocol direct".

It is not possible to be an ASBR and an NSSA. The ASBR configuration should be removed.

The interface between routers R1 and R3 needs to be in OSPF area 0 rather than OSPF area 1 because a backbone area must always exist.

OSPF

RIPv1

RIPv2

IS-IS

IS-IS routers exchange updates by sending UDP packets to a multicast address.

IS-IS routers exchange updates using IP multicast packets.

IS-IS routers exchange updates using Ethernet multicast packets.

IS-IS routers exchange updates by sending packets to the subnet broadcast address.

RIPv2 supports basic and MD5 authentication only.

RIPv2 supports password and MD5 authentication only.

RIPv2 does not support authentication, password and MD5 authentication.

RIPv2 does not support authentication.

Show ospf neighbors

Show router ospf neighbors

Show router ospf adjacency

Show ospf adjacency

Ping static 3.3.3.1

Ping static 0.0.0.0/0

Ping 3.3.3.1

Ping 0.0.0.0

Default path

Default gateway

Gateway path

Proxy ARP

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Two

Three

Four

At the bottom

In the middle

At the top

It does not matter where they are placed.

Broadcast

Non-Broadcast Multi-Access

Point-to-Point

Point-to-Multipoint

224.0.0.5

224.0.0.6

224.0.0.9

224.0.0.10

RIPv2 does not have support for multicast

AS Summary

Inter-Area Network

Inter-Area Router

Intra-Area Prefix

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

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

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

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

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

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

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

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

The router is correctly configured.

A reference-bandwidth is not configured on the router.

A reference-bandwidth is configured on the router but wide-metrics is not.

The interface metric must be manually configured to 100.

The primary and backup routes are to the same destination.

The primary and backup routes appear in the routing table.

The backup route is configured with a higher preference value.

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

Backbone

NSSA

Stub

Totally stubby

Link

Intra-Area Prefix

Inter-Area Prefix

Inter-Area Router

Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of hello timeouts.

Convergence is triggered when the physical interfaces between routers R1 and R2 go down.

Convergence will not be triggered because switches cannot run routing protocols between them.

Convergence is triggered when the switches notify the routers about the link-state info.

Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down.

IOM

CPM

FIB

SPF

The area ID does not have to match.

The value of the E bit in the options field does not have to match.

The value of the Hello interval does not have to match.

The value of the network mask does not have to match.

The area ID, the E bit value, the Hello interval and network mask must all match.

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

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

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

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

Add "stub no summaries" to the area 1 configuration on router R1.

Add the "originate-default-route" option in the area 1 configuration on router R1.

Add a default static route on router R3.

Include the system interface in the area 1 configuration on router R3.

Add a static route on router R3 to 192.168.3.1.

A default route on router R2 to router R1.

A default route on the PC to router R2.

A static route on the PC to router R2 and a static route on router R2 to the PC.

A default route on router R1 to router R2.

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.

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.

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

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

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

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

A Type 3 LSA is generated by an ASBR only when route summarization is configured.

A Type 3 LSA is generated by an ABR only when route summarization is configured.

A Type 3 LSA is generated by an ASBR to describe routes to routers outside the area.

A Type 3 LSA is generated by an ABR to describe routes to routers outside the area.