Information Technology Reference
In-Depth Information
Foundation Summary
The Foundation Summary is a condensed collection of material that provides a convenient
review of key concepts in this chapter. If you are already comfortable with the topics in this
chapter, this summary will help you recall a few details. If you just read the Foundation Topics
section, this review should help solidify some key facts. If you are doing your final preparation
before the exam, these materials are a convenient way to review the day before the exam.
RIPv1 Summary
The characteristics of RIPv1 are summarized as follows:
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Distance vector protocol.
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Uses UDP port 520.
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Classful protocol (no support for VLSM or CIDR).
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Metric is router hop count.
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Maximum hop count is 15; unreachable routes have a metric of 16.
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Periodic route updates broadcast every 30 seconds.
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25 routes per RIP message.
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Implements split horizon with poison reverse.
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Implements triggered updates.
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No support for authentication.
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Administrative distance for RIP is 120.
RIPv2 Summary
The characteristics of RIPv2 are summarized as follows:
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Distance vector protocol.
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Uses UDP port 520.
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Classless protocol (support for CIDR).
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Supports VLSMs.
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Metric is router hop count.
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Maximum hop count is 15; infinite (unreachable) routes have a metric of 16.
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