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4A0-100 Online Practice Questions and Answers

Questions 4

You are configuring your Nokia 7750SR Service Router from the Command Line Interface (CLI), and after entering a lengthy command, wish to return directly to the ROOT context. Which control command allows you to do this quickly?

A. Ctrl-z

B. Ctrl-c

C. Esc

D. Shift-Page Down

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Questions 5

Network address: 200.12.30.0 Network mask: 255.255.255.0

Use the information above. You need to create 12 subnetworks supporting 10 host addresses each. Which extended prefix will meet this requirement?

A. /12

B. /24

C. /26

D. /28

E. /30

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Questions 6

Address summarization reduces the routing table size by:

A. Allowing a contiguous block of network addresses to be represented by one network prefix.

B. Increasing the number of addresses in the routing table.

C. Summarizing addresses in the network into smaller routing tables.

D. Not advertising directly connected routes.

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Questions 7

What happens next after an incoming packet is de-encapsulated from the Layer 2 frame in a Nokia 7750 router?

A. The IP datagram is encapsulated in the appropriate Layer 2 frame by the MDA.

B. The IP datagram passes through the switch fabric to reach the egress IOM.

C. The IP datagram is passed to the IOM.

D. A lookup is performed in the FIB to determine the egress interface.

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Questions 8

Which is the public AS in the diagram?

A. 65001

B. 65003

C. 2002

D. All of the above.

E. None of the above.

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Questions 9

What must occur before a LAG becomes operational?

A. There must be multiple ports assigned to the LAG.

B. All ports in the LAG must be configured with the same speed and duplex settings.

C. Auto-negotiation must be enabled on all ports in the LAG.

D. The duplex setting on all the ports must be forced to half.

E. Auto-negotiation must be set to limited or disabled on at least one member port.

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Questions 10

Which of the following statements about router R1 is TRUE?

A. Router R1 is an iLER for both LSPs.

B. Router R1 is an eLER for both LSPs.

C. Router R1 is an iLER for LSP A and an eLER for LSP B.

D. Router R1 is an iLER for LSP B and an eLER for LSP A.

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Questions 11

What is the purpose of a multicast address?

A. To provide an address that refers to all devices in a network.

B. To provide an address that refers to a specific group of devices in a network.

C. To provide an address that refers to a group of devices with the same IP address in different Layer 2 networks.

D. To provide an address that refers to a single device in a network.

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Questions 12

What happens when a switch receives an Ethernet frame with unknown source and destination MAC addresses?

A. The frame is silently discarded.

B. The source MAC address is saved in the MAC FDB, and the frame is discarded.

C. The source MAC address is saved in the MAC FDB, and the frame is flooded to all ports except the receiving port.

D. The source and destination MAC addresses are saved in the MAC FDB, and the frame is flooded to all ports.

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Questions 13

Which of the following describes a default route?

A. It is used when forwarding control plane data to the local CPM.

B. It is used when there is no other known route for a given packet's destination.

C. It matches a specific /32 host address with the least cost to the destination.

D. It is used when forwarding multicast and broadcast packets.

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Exam Code: 4A0-100
Exam Name: Alcatel-Lucent Scalable IP Networks
Last Update: Mar 22, 2024
Questions: 352
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