Cisco CCNA CCNP Certification Exam Review Protocol Basics

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Cisco CCNA / CCNP Certification Exam Review: Protocol Basics


Overview


Understanding routing protocols is crucial for passing the Cisco CCNA and BSCI CCNP exams. Here's a simplified guide to the basics of RIPv1, RIPv2, IGRP, and EIGRP, brought to you by Chris Bryant, CCIE

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Routing Protocols Overview


RIPv1

- Updates Frequency: Broadcasts every 30 seconds to 255.255.255.255.
- Protocol Type: Classful; does not support VLSM.
- Algorithm: Bellman-Ford.
- Features:
- Equal-cost load balancing.
- Max hop count: 15.
- No authentication support.
- Handles up to 25 routes per update.

RIPv2

- Updates Frequency: Multicasts every 30 seconds to 224.0.0.9.
- Protocol Type: Classless; supports subnet masks.
- Algorithm: Bellman-Ford.
- Features:
- Equal-cost load balancing.
- Max hop count: 15.
- Supports clear-text and MD5 authentication.
- Handles up to 25 routes per update.

IGRP

- Updates Frequency: Broadcasts every 90 seconds to 255.255.255.255.
- Protocol Type: Cisco proprietary and classful.
- Algorithm: Bellman-Ford.
- Features:
- Equal-cost load balancing; supports unequal-cost load-sharing via the variance command.
- Max hop count: 100.

EIGRP

- Updates Frequency: Multicasts initial full routing table when an adjacency forms, then only when changes occur, to 224.0.0.10.
- Protocol Type: Classless; supports subnet masks.
- Algorithm: DUAL routing algorithm.
- Features:
- Unequal-cost load-sharing available with the variance command.

Conclusion


By mastering these protocol basics, you're not only preparing to ace your CCNA and CCNP exams but also equipping yourself for success in real-world networking tasks. Focus on the details, and you'll secure those coveted certifications!

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