4A0-114: Nokia Border Gateway Protocol Fundamentals for Services

By Nokia · Browse Mode
About the Exam

4A0-114 is Nokia's Border Gateway Protocol Fundamentals for Services exam. It covers foundational BGP knowledge for Nokia service-routing environments and is part of the Nokia Service Routing Certification track. Passing the exam demonstrates readiness for the Nokia Network Routing Specialist II (NRS II) certification path.

Exam Topics

  • Border Gateway Protocol Fundamentals33%
  • Multi-protocol BGP33%
  • BGP route reflectors34%

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Last updated December 1, 2025 at 9:36 AM

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QuestionQ1

Border Gateway Protocol Fundamentals

Which BGP message type verifies connectivity both during and after BGP session establishment?

Explanation

BGP KEEPALIVE messages acknowledge the successful OPEN exchange and are sent periodically to maintain and verify that the established BGP peer connection is still active.

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QuestionQ2

Border Gateway Protocol Fundamentals

Which of these statements about BGP is false?

Explanation

BGP does not dynamically discover peers through Hello messages. A BGP peering is configured, and the routers establish a TCP connection before exchanging BGP messages.

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QuestionQ3

Border Gateway Protocol Fundamentals

A TCP connection cannot be established with a BGP peer. Which of the following are valid BGP connection states?

Explanation

A BGP peer whose TCP session is not established can be in Idle, where BGP is awaiting a start event or has reset after an error, or Active, where it is retrying the TCP three-way handshake. Connect is the state awaiting completion of that handshake, whereas OpenSent is reached only after TCP has been established. Cisco documents that a session which is not up can vary between Idle and Active.

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QuestionQ4

Border Gateway Protocol Fundamentals

A BGP session remains in the Connect state. What is the most likely cause?

Explanation

The BGP Connect state indicates that the local router is attempting to establish the TCP connection used by BGP. If the local neighbor is configured but the remote BGP peer is not configured correctly, the session cannot be established.

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QuestionQ5

Border Gateway Protocol Fundamentals

Which statement about BGP is FALSE?

Explanation

iBGP peers do not have to be directly adjacent. They may establish a BGP session across multiple routed hops when IP reachability exists.

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Topics covered
Border Gateway Protocol FundamentalsMulti-protocol BGPBGP route reflectors
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