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  5. Alcatel-Lucent Interior Routing Protocols and High Availability Questions and Answers

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Questions # 21:

When IS-IS elects a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the priorities are the same?

Options:

A.

The system ID.

B.

The loopback address.

C.

The sequence number of the Hello packet.

D.

The device that first initiated communication becomes the DIS

E.

The highest interface MAC address.

Expert Solution
Questions # 22:

Which of the following statements describe the major features of OSPF? Choose two answers.

Options:

A.

Fast reroute capability

B.

Control traffic prioritization

C.

Route redistribution

D.

Traffic engineering extensions

E.

Cut through forwarding

Expert Solution
Questions # 23:

Which of the following features are supported by IS-IS? Choose three answers.

Options:

A.

PDU authentication.

B.

The ability to customize the link cost metric.

C.

Use of Bellman-Ford routing algorithm.

D.

Classless routing.

E.

Updates sent as layer 3 multicast.

Expert Solution
Questions # 24:

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

Expert Solution
Questions # 25:

What causes an adjacency to change from down to two ways?

Options:

A.

When a link state update is received in response to a link state request.

B.

When a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor.

C.

When a router receives a database description packet from a neighbor.

D.

When a link state acknowledgement is received in response to a link state update.

Expert Solution
Questions # 26:

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

Options:

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.

Expert Solution
Questions # 27:

An Alcatel-Lucent 7750 SR receives a route via an IS-IS LSP with internal reach ability, and receives the same route via an OSPF type 5 LSA. If al protocol preferences are default, which route will be installed in the route table?

Options:

A.

The route learned via IS-IS will be installed.

B.

The route learned via the OSPF type 5 LSA will be installed.

C.

Both routes will be installed, if ECMP is enabled.

D.

Both routes will be installed, regardless of whether ECMP is enabled.

Expert Solution
Questions # 28:

Which of the following statements apply to link state protocol behavior? Choose three answers.

Options:

A.

Routers broadcast the entire route table to all neighbors.

B.

Information about directly connected links is sent to all neighbors.

C.

An adjacency database is maintained by each router.

D.

The sequence number for an update is incremented as it is flooded from router to router.

E.

The topological database is the same for all routers in a single area.

Expert Solution
Questions # 29:

There is an IP host with IP address 10.2.3.1. A static route is created, using the "configure router static-route 10.2.3.0/24 next-hop 10.1.2.1" command. What is the correct traceroute command to test this static route on an Alcatel-Lucent 7750 SR?

Options:

A.

traceroute 10.2.3.1

B.

traceroute 10.2.3.1 next-hop 10.1.2.1

C.

traceroute next-hop 10.1.2.1

D.

traceroute does not work on the Alcatel-Lucent 7750 SR.

E.

traceroute 10.1.2.1

Expert Solution
Questions # 30:

In IS-IS, which of the following statements regarding an L1/L2 router is false?

Options:

A.

An L1/L2 router can have neighbors in different areas.

B.

An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.

C.

An L1/L2 router advertises its L2 routes to its L1 neighbors.

D.

An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.

Expert Solution
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