[Nov-2025] Alcatel-Lucent Certifications 4A0-100 Exam Practice Test Questions Dumps Bundle!
2025 Updated 4A0-100 PDF for the 4A0-100 Tests Free Updated Today!
Alcatel-Lucent 4A0-100 exam comprises of 60 multiple-choice questions that need to be completed within the allocated time of 90 minutes. 4A0-100 exam is organized into five sections that cover different aspects of IP networking, starting from the basics of routing and switching to advanced topics such as network virtualization, security, and Quality of Service (QoS). To pass the exam, the candidate needs to score at least 70%.
NEW QUESTION # 143
Which of the following statements is FALSE when describing a Virtual Private LAN Service?
- A. When a VPLS receives a frame with an unknown MAC destination, the frame will be dropped.
- B. MAC addresses are maintained in a MAC address forwarding database (FDB).
- C. A VPLS emulates a virtual switch or bridge.
- D. The VPLS performs MAC learning on MAC addresses seen from SAPs and SDPs.
Answer: A
NEW QUESTION # 144
The TiMOS-m.n.Y.Z software image file is software that:
- A. Loads the router software image.
- B. Transfers the router configuration from the router to the network management system.
- C. Contains all the components required to configure and run protocols on the Alcatel-Lucent 7750 SR/7450 ESS.
- D. Loads the router configuration.
Answer: C
NEW QUESTION # 145
As described by the CSMA/CD algorithm, what is the first thing to happen when Host A and Host B begin transmitting data at the same time?
- A. Host A and B will generate a jam signal.
- B. Listening hosts will request retransmission.
- C. A back-off timer is started by Host A or B.
- D. Host A or B will retry the transmission.
Answer: A
Explanation:
Section: Volume A
NEW QUESTION # 146
Which of the following enables service providers to support multiple customers with the same VLAN ID over the same backbone?
- A. VLAN Trunking
- B. VLAN Stacking
- C. VLAN Tagging
- D. VLAN Routing
Answer: B
NEW QUESTION # 147
The TCP/IP and OSI models of protocol are similar in that they both have:
- A. An applications services layer with similar layering and service definitions.
- B. A transport layer with two protocols.
- C. An application and session layer.
- D. A network layer that provides a universal and consistent forwarding service.
Answer: B
NEW QUESTION # 148
Which of the following Nokia 7750 SR components is NOT part of the data plane?
- A. The Media Dependent Adapter (MDA)
- B. The Input/ Output Module (IOM)
- C. The eXpandable Media Adapter (XMA)
- D. The Control Processor Module (CPM)
Answer: D
NEW QUESTION # 149
Which of the parameters in Hello messages exchanged between two OSPF neighbors must be the same to keep the adjacency alive in OSPF? (Choose four.)
- A. Router priority.
- B. Hello interval.
- C. Interface MTU.
- D. Authentication password.
- E. Area ID.
- F. Dead interval.
Answer: B,D,E,F
Explanation:
Section: Volume B
NEW QUESTION # 150
When entering a command on the Nokia 7750 SR from the Command Line Interface (CLI), what would you use to list all the options for the command?
- A. tab character
- B. space character
- C. info
- D. ?
Answer: D
NEW QUESTION # 151
Using Q-in-Q Virtual Local Area Network (VLAN) stacking, how does a carrier differentiate one customers traffic from that of another?
- A. The PE switch adds a second VLAN tag to identify the customers traffic on the carriers network.
- B. The provider edge (PE) switch adds an additional field called a PE tag to the customers Layer 2 data.
- C. The PE switch assigns a customer-specific priority label to the customers traffic.
- D. The PE switch replaces the customers VLAN tag with a carrier-assigned tag.
Answer: A
NEW QUESTION # 152
Based on the network diagram (click on exhibit), Router 1 installs the network D in its routing table, based on a dynamic routing update from Router 2. Which of the following describes the information that will be installed in the routing table?
- A. Any of the above
- B. 172.16.9.0/24 next-hop 10.10.10.1
- C. 172.16.9.0/24 next-hop 10.10.10.2
- D. 172.16.9.0.24 next-hop 10.10.10.3
Answer: D
NEW QUESTION # 153
How many subnets and host addresses are obtained by subnetting network 201.148.26.0/24 using a /26 subnet mask?
- A. 4 subnets, 64 hosts per subnet
- B. 4 subnets, 62 hosts per subnet
- C. 8 subnets, 30 hosts per subnet
- D. 8 subnets, 32 hosts per subnet
Answer: C
Explanation:
A/26 subnetmeans26 bits for the networkand6 bits for host addressing(32 - 26 = 6):
* 2# = 64 total addresses per subnet
* 64 - 2 =62 usable host addresses per subnet
* /24 to /26 increases subnet bits by 2, so:
* 2² =4 subnetsfrom one /24
* But the question asks aboutusing /26, which means:
* From /24 # each /26 block gives64 IPs
* So you get4 subnets total
* But the options must be interpreted carefully!
#Let's calculate again properly:
* /26 = 64 addresses per subnet (2#)
* Usable hosts per subnet = 64 - 2 = 62
* Number of subnets in /24 when divided by /26 = 2^(26 - 24) = 4 subnets So correct result is:
* 4 subnets, 62 hosts per subnet#Correct answer: C
However,Option D says 8 subnets, 30 hosts per subnet, which actually matches a/27 mask, not /26.
Reference:
Nokia IP Fundamentals Guide - Chapter: "Subnetting and Address Calculations" Subnet Math - RFC 950 principles
NEW QUESTION # 154
Which of the following about transactional configuration is FALSE?
- A. A router uses the running configuration datastore for its operation.
- B. Configuration changes are stored in a candidate configuration datastore.
- C. Configuration changes are activated by committing the candidate configuration.
- D. A running configuration datastore consists of multiple candidate configuration datastores.
Answer: D
NEW QUESTION # 155
What is the name for an organization that provides Internet services to its customers?
- A. An ISP.
- B. A home based business.
- C. A content provider.
- D. A large corporation.
Answer: A
Explanation:
Section: Volume A
Explanation/Reference:
NEW QUESTION # 156
What must occur before a LAG becomes operational?
- A. Auto-negotiation must be enabled on all ports in the LAG.
- B. All ports in the LAG must be configured with the same speed and duplex settings.
- C. The duplex setting on all the ports must be forced to half.
- D. Auto-negotiation must be set to limited or disabled on at least one member port.
- E. There must be multiple ports assigned to the LAG.
Answer: B
NEW QUESTION # 157
Which of the following are correct statements about MPLS labels? (Choose 3)
- A. MPLS labels may be dynamically signaled or statically assigned by the service provider.
- B. Labels are globally significant to the MPLS network.
- C. A sequence of label actions from one LER to another LER represents a logical tunnel known as an LSP.
- D. Labels are locally significant to the MPLS router.
- E. MPLS labels must be dynamically signaled.
Answer: A,C,D
NEW QUESTION # 158
Which of the following statements is TRUE regarding a VPWS service?
- A. VPWS requires MAC learning in order to forward frames to the correct destination
- B. A Spanning Tree Protocol must be enabled when deploying a VPWS.
- C. VPWS treats multicast traffic similar to unicast traffic.
- D. VPWS is a point-to-multipoint service.
Answer: C
NEW QUESTION # 159
Which of the following statements is FALSE when describing a Virtual Private LAN Service?
- A. When a VPLS receives a frame with an unknown MAC destination, the frame will be dropped.
- B. MAC address forwarding database (FDB) is maintained for each VPLS.
- C. A VPLS emulates a virtual switch or bridge.
- D. The VPLS performs MAC learning on MAC addresses seen from SAPs and SDPs.
Answer: A
Explanation:
Section: Volume B
NEW QUESTION # 160
Which of the following user interface sessions are accessible through Telnet and Secure Shell (SSH) on the Alcatel-Lucent 7750 SR and 7450 ESS?
- A. Command Line Interface (CLI).
- B. All of the above.
- C. Node Management Terminal Interface (NMTI).
- D. Graphic User Interface (GUI).
Answer: A
NEW QUESTION # 161
What is the basic unit of framing in SDH and the bit rate for its transmission?
- A. STM-1 with a bit rate of 155.52 Mbit/s
- B. STM-1 with a bit rate of 51.84 Mbit/s
- C. STM-1 with a bit rate of 2.048 Mbit/s
- D. STM-1 with a bit rate of 1.544 Mbit/s
Answer: A
Explanation:
Section: Volume A
NEW QUESTION # 162
Which of the following best describes an autonomous system?
- A. An autonomous system is a network or group of networks operating under one administrative authority.
- B. An autonomous system is another term for the collection of routers that make up the Internet
- C. An autonomous system is a network or group of networks from many organizations running different
IGP routing protocols, but all running BGP. - D. An autonomous system is a loosely defined term that can refer to any organization that has a
connection to the Internet.
Answer: A
NEW QUESTION # 163
Which of the following statements best characterize Link State Routing? (Choose 2)
- A. Routers periodically send a copy of their routing table to their neighbors.
- B. Network converges quickly (within several seconds) after a topology change.
- C. Routers flood link information throughout the entire area.
- D. Routers do not have precise knowledge of the entire network topology.
Answer: B,C
NEW QUESTION # 164
Which of the following protocols can be used to force traffic from router R2 to use the direct link to router R4?
- A. Static routing
- B. eBGP
- C. OSPF
- D. IS-IS
Answer: A
NEW QUESTION # 165
With a subnet mask of 255.255.255.224, which of the IP addresses below are valid host addresses? (Choose all that apply)
- A. 192.11.25.87
- B. 17.23.119.63
- C. 87.99.12.159
- D. 95.11.22.93
Answer: A
NEW QUESTION # 166
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