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Nokia 4A0-112 New Study Guide - Reliable 4A0-112 Test Cram

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Nokia 4A0-112 (Nokia IS-IS Routing Protocol) Exam is designed to test candidates' knowledge and understanding of the InterDomain Routing Protocol (IDRP) and Internet Engineering Task Force (IETF) standards-based Interior Gateway Protocol (IGP), Intermediate System-to-Intermediate System (IS-IS) routing protocol. Nokia's IS-IS routing protocol enables the scalable and efficient routing of network traffic through a hierarchical network infrastructure. As such, it is used extensively in large enterprise and service provider networks.

Nokia 4A0-112 Certification Exam is a globally recognized certification exam that focuses on the Nokia IS-IS routing protocol. 4A0-112 exam is designed for network professionals who want to validate their knowledge and skills related to Nokia's IS-IS protocol. Passing 4A0-112 exam demonstrates that the candidate has a thorough understanding of the IS-IS protocol, its components, and its applications.

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Nokia 4A0-112 Exam covers a range of topics related to the IS-IS protocol, including its design, configuration, and operation in a network environment. Candidates will be expected to have a deep understanding of IS-IS features and functionality, as well as the ability to troubleshoot common issues that may arise in IS-IS networks. In addition, the exam will test candidates' knowledge of related technologies such as IP routing, MPLS, and BGP.

Nokia IS-IS Routing Protocol Sample Questions (Q37-Q42):

NEW QUESTION # 37
For a link-state routing protocol, which of the following statements about link-state updates is FALSE?

A. Aging helps ensure that routers that are no longer part of the topology will eventually get removed from the link-state database.
B. When a router detects that a link-state update has reached its maximum age, it will request a new update from the source router.
C. The age value is updated as the link-state update is flooded throughout the network and when it is in the link-state database
D. When a link-state update reaches its maximum age on a router, the router will flood that update to its neighbors.

Answer: D

Explanation:
When a link-state update reaches its maximum age, it is removed from the router's link-state database, not flooded to its neighbors. This prevents outdated information from continuing to affect the routing decisions. The router does not flood the aged update; instead, it will typically request a new link-state advertisement from the original source router if the information is still needed.

NEW QUESTION # 38
Which of the following is a valid alternative representation of the IPv6 address
2001:0da8:0000:0000:0024:0000:4ab9:0300?

A. 2001:da8::0:24::4ab9:300
B. 2001:0da8::0024:0000:4ab9:03
C. 2001:da8::24::4ab9:300
D. 2001:da8::24:0:4ab9:300

Answer: B

Explanation:
In IPv6, consecutive sections of zeros can be abbreviated with a double colon (::) once in an address. Also, leading zeros in each hextet (group of four hexadecimal digits) can be removed.
The original address is 2001:0da8:0000:0000:0024:0000:4ab9:0300.
Removing leading zeros and applying the abbreviation:

NEW QUESTION # 39
A new router is added to a broadcast network. What does IS-IS use as the tiebreaker for selecting the DIS if the priorities are the same?

A. The existing DIS remains the DIS.
B. The router with the highest system ID.
C. The router with the highest interface MAC address.
D. The Hello packet with the highest sequence number.

Answer: B

Explanation:
In IS-IS, the Designated Intermediate System (DIS) is responsible for certain tasks on broadcast networks, such as generating link-state advertisements and acting as the central point for flooding information.

NEW QUESTION # 40
On a broadcast interface, an IS-IS router receives an LSP that is newer than the one on its database. Which of the following statements best describes the actions taken by the router as a consequence?

A. The router updates its database with the LSP and floods a copy to its neighbors on other interfaces.
B. The router updates its database with the LSP and acknowledges it with a PSNP.
C. The router updated its database with the LSP, acknowledges the LSP with a PSNP, and floods a copy to its neighbors on other interfaces.
D. The router sends back a copy of the LSP from its database to its neighbor.

Answer: C

Explanation:
When an IS-IS router receives a newer LSP (Link-State PDU) than the one already in its database, it takes the following actions:
Updates its link-state database with the new LSP.
Acknowledges the LSP with a PSNP (Partial Sequence Number PDU), which is sent to the router that originated the LSP, confirming the receipt of the newer LSP.
Floods a copy of the updated LSP to its neighbors on other interfaces to ensure all routers in the network have the updated topology information.

NEW QUESTION # 41
Refer to the exhibit.

All routers in the diagram are running an interior gateway protocol (IGP) and have been configured with an ECMP value of 4. Router R5 advertises the prefix 192.168.3.0/24 using the IGP. Assuming all links have the same cost, how many entries for prefix 192.168.3.0/24 will be in router R3's routing table?

A. 0
B. 1
C. 2
D. 3

Answer: B

Explanation:
In this scenario, the routers are configured with an Equal-Cost Multi-Path (ECMP) value of 4, meaning they can utilize up to 4 equal-cost paths to reach a destination. Since Router R5 is advertising the 192.168.3.0/24 prefix and all links have the same cost, router R3 will receive multiple routes to reach this destination.
Given that all the routers (R1, R2, R3, R4, and R5) are connected in a way that can support multiple equal-cost paths, and assuming ECMP is set to 4, the routing table on Router R3 will have up to 4 entries for the prefix 192.168.3.0/24.
Thus, Router R3's routing table will contain 4 entries for the prefix 192.168.3.0/24.

NEW QUESTION # 42
......

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