Alcatel-Lucent 4A0-100 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 4A0-100
Exam Name/Title: Nokia IP Networksand Services Fundamentals
Certification Provider: Alcatel-Lucent
Corresponding Certification: Alcatel-Lucent Certifications

Exam Questions: 377
Updated On: May 30, 2026

Question #71

Which of the following about the displayed IP filter is TRUE?

A. TCP (protocol 6) traffic from source address 1.2.3.0/24 to destination address 2.3.4.0/24 is forwarded.

B. TCP (protocol 6) traffic between addresses 1.2.3.0/24 and 2.3.4.0/24 is dropped.

C. TCP (protocol 6) traffic from source address 1.2.3.0/24 to destination address 2.3.4.0/24 is dropped.

D. TCP (protocol 6) traffic from source address 2.3.4.0/24 to destination address 1.2.3.0/24 is dropped.

Discussion 0

Correct Answer: B Vote an answer

Question #72

What must the sender do when it receives a window size of 0 from the receiver?

A. Stop transmitting.

B. Terminate the TCP session.

C. Retransmit the previous segment.

D. Send the next segment.

Discussion 0

Correct Answer: A Vote an answer

Question #73

Which type of IP address contains the network number and all 1's for the host address?

A. Broadcast address.

B. Unicast address.

C. Anycast address.

D. Multicast address.

Discussion 0

Correct Answer: A Vote an answer

Question #74

What distance is supported using CAT-5 cabling for 10/100/1000 TX?

A. 100 m.

B. 500 m.

C. 1 Km.

D. 10 Km.

Discussion 0

Correct Answer: A Vote an answer

Question #75

What type of MAC address is 01:00:5e:01:01:01?

A. Broadcast

B. Multicast

C. Unicast

D. Anycast

Discussion 0

Correct Answer: B Vote an answer

Question #76

What is the function of Layer 2?

A. Layer 2 is responsible for encapsulating application data into TCP/UDP messages.

B. Layer 2 is responsible for encapsulating packets into IP datagrams and routing them.

C. Layer 2 is responsible for encapsulating packets into frames for transmission on physical media.

D. Layer 2 is responsible for the timing of the signals on physical media.

Discussion 0

Correct Answer: D Vote an answer

Question #77

What is the name for an organization that provides Internet services to its customers?

A. An Internet service provider

B. An enterprise

C. An Internet content provider

D. A regional Internet registry

Discussion 0

Correct Answer: A Vote an answer

Question #78

Which of the following is a characteristic of ATM?

A. Ideal for multiple services on the same physical line.

B. Provides enhanced QoS support with 5 classes of service.

C. None of the above

D. All of the above.

E. Application data is transported in 53-byte cells.

F. ATM circuits are identified by a VPI/VCI value.

Discussion 0

Correct Answer: D Vote an answer

Question #79

Which of the following Ethernet rates requires an optical cable to operate?

A. 100 Mb/s Ethernet.

B. 10 Mb/s Ethernet.

C. There are copper and optical versions possible for all of these Ethernet data rates.

D. 1000 Mb/s Ethernet .

Discussion 0

Correct Answer: C Vote an answer

Question #80

What is the sequence of events for a client to receive an IP address from the server in the DHCP?

A. Request, acknowledgement, discover, offer.

B. Discover, offer, request, acknowledgement.

C. Discover, request, offer, acknowledgement.

D. Request, offer, discover, acknowledgement.

Discussion 0

Correct Answer: B Vote an answer

Question #81

TCP is sending data in 5 segments with SEQ numbers 27000, 27500.28000, 28500, and 29000 respectively. During transmission, the segment with SEQ=28500 is dropped in the network. How does TCP handle this situation?

A. Once the reciever's window is full. TCP assembles the payload and determines that SEQ=28500 is missing. At this point, the reciever sends the RST flag with SEQ=28500 to Request Single Transmission of the missing segment.

B. TCP will collect the segments and forward them to the application layer where the SEQ numbers will be processed and a retransmit request will occur for the entire packet.

C. The receiving end station sends an ACK flag with SEQ=28000 to indicate it has received a segment out of order.

D. The receiving station sends a NACK frame with SEQ=28500 requesting that the frame be retransmitted

Discussion 0

Correct Answer: C Vote an answer

Question #82

Choose two true statements that characterize Link State Routing

A. Routers do not have precise knowledge of the entire network topology.

B. Network converges quickly (within several seconds) after a topology change.

C. Routers flood link information throughout the entire area.

D. Routers send a copy of their routing table to their neighbors periodically.

Discussion 0

Correct Answer: B,C Vote an answer

Question #83

In an MPLS network, which device is responsible for taking an unlabeled packet and encapsulating it with an MPLS label?

A. Egress Label Edge Router

B. Ingress Label Edge Router

C. Label Switching Router

D. Next-hop Router

Discussion 0

Correct Answer: B Vote an answer

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Question #84

What is the next-hop for network 172.16.1.0/24 installed in router 2's routing table?

A. 10.10.10.0

B. 10.10.10.1

C. 10.10.10.3

D. 10.10.10.2

Discussion 0

Correct Answer: B Vote an answer

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