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4A0-C04 Questions and Answers

Question # 6

When an OSPF adjacency is stuck in the "ExchStart" state, what is the most likely cause?

A.

The MTU does not match on both interfaces

B.

OSPF is not enabled on one of the routers

C.

The Router ID is the same on both routers

D.

A OSPF Hello has not been received from the neighbor

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Question # 7

Click the exhibit.

This is output from router R4. Service 333 is a VPLS. Why does peer 10.10.10.1 not have an EgrLbl?

A.

The SDP to 10.10.10.1 on router R4 is shutdown.

B.

Router R4 has not sent a label to router R1 (10.10.10.1) yet.

C.

10.10.10.1 has a different service MTU set.

D.

10.10.10.1 has not sent a label to router R4 yet.

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Question # 8

An operator configures an Nokia 7750 SR with a loopback interface and IPv6 address. The operator then configures a routing policy to redistribute the loopback prefix into OSPFv3. What type of LSA is used to advertise the route to 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

F.

None of the statements are correct.

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Question # 9

Click the exhibit.

Assuming that none of the routers within AS 65200 is configured with next-hop-self", what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

A.

AS Path of 65200 65100, Next Hop of router A.

B.

AS Path of 65200 65100, Next Hop of router E.

C.

AS Path of 65100, Next Hop of router E.

D.

AS Path of 65100, Next Hop of router A.

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Question # 10

Click on the exhibit.

LSP 1's link between routers R3 and R6 has failed, and the RESV state at router R3 has timed out. Which of the following actions will router R3 initiate?

A.

Send a PathTear message towards router R6.

B.

Send a PathTear message towards router R1.

C.

Send a ResvTear message toward router R6.

D.

Send a ResvTear message toward router R1.

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Question # 11

NSSA LSA packets are what type within an NSSA area, and are converted to what other type at the ABR?

A.

They are type 7 within the area and are not modified at the ABR

B.

They are type 5 within the area and converted to type 3 at the ABR

C.

They are type 5 within the area and are not modified at the ABR

D.

They are type 7 within the area and converted to type 5 at the ABR

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Question # 12

A network consists of four PE routers. A customer requires a VPLS and has sites connected to each PE. The VPLS is fully meshed using IP/MPLS. How many SDPs must be configured on each PE?

A.

3

B.

4

C.

6

D.

8

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Question # 13

What Nokia 7750 SR OAM tool can be used to verify the end-to-end connectivity of a service?

A.

Sdp-ping

B.

Isp-ping

C.

Svc-ping

D.

Sdp-mtu

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Question # 14

Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that there are no stub networks, which of the following statements regarding Type 4 LSA generation is true?

A.

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

B.

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

C.

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

D.

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.

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Question # 15

What happens by default on an Nokia 7750 SR when a VPLS accepts a tagged frame at the ingress SAP 1/1/1:100?

A.

The FCS is verified and kept in the customer frame. The VLAN tag is kept and transported over the network.

B.

The FCS is verified and kept in the customer frame. The VLAN tag is removed for transport over the network.

C.

The FCS is verified and removed from the frame. The VLAN tag is kept for transport over the network.

D.

The FCS is verified and removed from the frame. The VLAN tag is removed for transport over the network.

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Question # 16

Choose the Distance Vector Protocols from the list below:

A.

OSPF

B.

RIPv1

C.

RIPv2

D.

IS-IS

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Question # 17

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

A.

"client1" routes will be tagged with communities "North" and "West".

B.

"client1" routes will be tagged with community "West".

C.

"client1" routes will be tagged with community "North".

D.

"client1" routes will be rejected.

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Question # 18

Initially, all ports on an Nokia 7750 SR have 10Gbps bandwidth. RSVP configuration limits reservable bandwidth to 30 percent on all interfaces. An LSP is signaled reserving 1 Gbps bandwidth. How much unreserved bandwidth is left on the interface?

A.

10 Gbps

B.

7 Gbps

C.

3 Gbps

D.

2 Gbps

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Question # 19

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

A.

Area ID W B.

B.

Hello and Dead intervals PC.

C.

Stub flag

D.

Checksum values

E.

The list of neighbors

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Question # 20

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 # 21

Which of the following about IS-IS Traffic Engineering on an Nokia 7750 SR is FALSE?

A.

Traffic engineering information is carried in the extended TLVs.

B.

Traffic engineering must be enabled on all IP/MPLS routers along the LSP path.

C.

Traffic engineering information is stored in the opaque database,

D.

Traffic engineering is required for constraint-based LSPs.

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Question # 22

Which of the following about Type 10 opaque LSAs is TRUE?

A.

Type 10 opaque LSAs are supported by IS-IS.

B.

Type 10 opaque LSAs are flooded to all areas of the routing domain.

C.

Type 10 opaque LSAs are stored in an LSDB.

D.

Type 10 opaque LSAs are used for traffic engineering support.

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Question # 23

When are virtual links used in OSPF?

A.

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

B.

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

C.

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

D.

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

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Question # 24

Click on the exhibit.

Which of the following is FALSE?

A.

The Isp-ping tool is used to perform a unidirectional LSP test.

B.

The router 10.10.10.2 is the egress router of the LSP.

C.

The router can reach the far-end of the LSP through an RSVP-TE tunnel.

D.

The router can reach the far-end of the LSP through an LDP tunnel.

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Question # 25

Which of the following best describes the type of packets used by OSPF routers to exchange updates on a point-to-point link?

A.

IP packets sent to an IP multicast address.

B.

TCP packets sent to an IP multicast address.

C.

IP packets sent to an IP unicast address.

D.

UDP packets sent to an IP multicast address.

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Question # 26

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes" on router R5?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 27

Which of the following about SAPs is TRUE?

A.

More than one SAP can be configured on a physical port that is configured for null encapsulation.

B.

Dot1Q Ethernet encapsulated access ports can support multiple SAPs and services.

C.

SAPs can be created on ports designated as "Network".

D.

SAPs can only be created on Ethernet ports.

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Question # 28

A BGP session is in OpenConfirm state. Which of the following messages must be received to transition to Established state?

A.

Update

B.

Open

C.

Notification

D.

Keepalive

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Question # 29

Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. Router R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP configuration on routerR4, how many primary and backup paths will be present in router R4's BGP routing table?

A.

Three primary paths,

B.

Two primary paths and one backup path.

C.

One primary path and two backup paths.

D.

One primary path and one backup path.

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Question # 30

Click the exhibit.

AS 65100 is advertising 192.168.1.0/27 into BGP. Which of the following AS Paths would the prefix 192.168.1.0/27 contain when viewed on router R8?

A.

65200 (65206 65202) 65100

B.

(65206 65202)65100

C.

65250 (65206 65202) 65100

D.

65200 65100

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Question # 31

What are some of the characteristics of Nokia's implementation of non-stop routing? (Choose two)

A.

No protocol extensions required

B.

Only supported by OSPF and IS-IS

C.

Transparent to routing neighbors

D.

Uses Graceful Restart to inter-operate with other vendors

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Question # 32

Click the exhibit button.

Router R2 advertises the network 192.168.3.0/24 to router R1 via OSPF. A route policy has been constructed to discard the route on router R1; however, it is not working. What is the problem?

A.

The prefix list reject should be "192.168.3.0/16 exact".

B.

Router R1 should be configured as an OSPF "asbr".

C.

The policy "reject" should be set for import rather than export.

D.

The policy was likely not "committed" after creation.

E.

This is not possible because OSPF cannot use import policies.

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Question # 33

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 # 34

Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?

A.

They must be recognized by all peers and included in all BGP updates.

B.

They are discarded if not recognized by the recipient.

C.

They must be recognized by all peers and optionally included in BGP updates.

D.

The receiving router sends a notification if a well-known discretionary attribute is not present in an update.

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Question # 35

Click on the exhibit.

When router R1 forwards a PATH message to router R2, which of the following about the PATH message's IP header is TRUE?

A.

The options field is set to router alert.

B.

The source address is R1's egress interface address.

C.

The destination address is R2's ingress interface address.

D.

The HOP object includes R2's system address.

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Question # 36

Which of the following regarding MPLS encapsulation for VPRN services is TRUE?

A.

The customer's Layer 3 header is removed at the iLER.

B.

The customer's Layer 2 header is removed at the iLER.

C.

The customer's Layer 3 header is removed at the eLER.

D.

The customer's Layer 2 header is removed at the eLER.

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Question # 37

Two Nokia 7750 SRs are established BGP peers with the following add-paths configuration:

R1: configure router bgp add-paths ipv4 send 4 receive

R2: configure router bgp add-paths ipv4 send 2

If router R1 advertises three routes for a given prefix X, how many routes is router R2 expected to have for prefix X?

A.

None

B.

2

C.

3

D.

4

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Question # 38

A default route for a client is also known as the:

A.

Default path

B.

Default gateway

C.

Gateway path

D.

Proxy ARP

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Question # 39

Click the exhibit.

Assume all router-IDs are properly configured, and IPv6 link-local addresses are used to establish all eBGP sessions. Given the following iBGP configuration on router A, what is the Next Hop for prefix 2001:DB8:A:401::1/128 on router B?

A.

The IPv6 link-local address of the router D interface towards router A.

B.

The IPv6 link-local address of the router A interface towards router D.

C.

The IPv6 global address of router A.

D.

The IPv6 global address of router D.

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Question # 40

Click the exhibit.

This PE is connected to an IPv4 core and is being configured to support 6VPE for a VPRN. Which of the following completes this section of the configuration?

A.

Family ipv4

B.

Family ipv6

C.

Family ipv4 ipv6

D.

Family vpn-ipv4

E.

Family vpn-ipv4 vpn-ipv6

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Question # 41

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes on router R1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 42

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that router R6 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 43

An autonomous system has 7 routers configured with BGP. How many iBGP sessions are required for a fully meshed configuration?

A.

7

B.

13

C.

21

D.

42

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Question # 44

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

A.

Area ID

B.

Hello and Dead Intervals

C.

Stub flag

D.

DR and BDR addresses

E.

The list of neighbors

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