Cisco Certified Network Associate (CCNA) Practice Exam

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What transport protocol does EIGRP utilize for communication between neighbors?

  1. UDP

  2. TCP

  3. Reliable Transport Protocol (RTP)

  4. Simple Network Management Protocol (SNMP)

The correct answer is: Reliable Transport Protocol (RTP)

EIGRP, or Enhanced Interior Gateway Routing Protocol, utilizes the Reliable Transport Protocol (RTP) for communication between neighbors. RTP is specifically designed to ensure the reliable delivery of EIGRP messages, such as updates, acknowledgments, and query messages. It operates over multicast as well as unicast, which allows for efficient communication among multiple routers without requiring a TCP connection. The choice of RTP is particularly advantageous because it combines the need for reliable data delivery with minimal overhead, making it suitable for routing updates where timely communication is crucial. This helps maintain optimal routing tables while minimizing the impact on network performance.

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