Free Practice Questions for Nokia 4A0-C01 Exam

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.

Black hole

Default gateway

Gateway path

Proxy ARP

Neighbor, adjacency, route table

Neighbor, topology, forwarding

Topology, routing, forwarding

There are only two databases: adjacency and topology

When a Link State Update is received in response to a Link State Request

When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list

When OSPF neighbors exchange Database Descriptor packets

When a Link State Acknowledgement is received in response to a Link State Update

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.

Both routers will generate OSPF Hello packets.

The system interface is missing in one configuration so OSPF will not operate correctly.

The interface type settings differ, but OSPF will still operate correctly.

Metric values differ, but this does not prevent OSPF operation.

L1 and L2 routers elect separate DIS's.

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

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.

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

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.

Option A

Option B

Option C

Option D

Broadcast

Non-Broadcast Multi-Access

Point-to-Point

Point-to-Multipoint

Not So Stubby Areas

Level 1 Areas

Stub Areas

Partially Stubby Areas

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

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

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

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

Whatever the advertised metric happens to be.

A value of 1.

This must be administratively set as there is no default value.

A value of 15.

L1 routers in the same area

L1 routers in other areas

L2 routers in the same area

L2 routers in other areas

L1/L2 router in the same area

L1/L2 routers in other areas

Source IP address

TCP source port

Prefix list

Protocol type

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.

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

L1/L2 Hello packets are exchanged on broadcast links.

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

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

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

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

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.

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

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.