Dynamic Routing Overview Quiz
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Questions and Answers

What is the primary factor that determines which route is preferred in a routing table?

  • Type of routing protocol used
  • Longest prefix match
  • Speed of the network connection
  • Administrative distance (correct)

Which routing protocol converges the fastest?

  • OSPF (correct)
  • Static routing
  • EIGRP
  • RIP

What is the administrative distance assigned to static routes?

  • 0
  • 90
  • 120
  • 1 (correct)

In the context of routing tables, what does the lookup process prioritize when determining the best route?

<p>The longest prefix match (B)</p> Signup and view all the answers

Which of the following represents the characteristic of a directly connected route?

<p>Is the most preferred route (B)</p> Signup and view all the answers

What aspect of convergence is notably slower in distance-vector protocols?

<p>Update propagation time (D)</p> Signup and view all the answers

Among the listed protocols, which one is associated with an administrative distance of 120?

<p>RIP (D)</p> Signup and view all the answers

What is the primary function of dynamic routing protocols?

<p>To automatically discover and maintain routing information. (C)</p> Signup and view all the answers

Which of the following is NOT an advantage of dynamic routing?

<p>Provides faster routing decisions than static methods. (C)</p> Signup and view all the answers

Which dynamic routing protocol uses the Bellman-Ford algorithm?

<p>RIP (A)</p> Signup and view all the answers

In which type of routing protocol do the protocols not send subnet mask information?

<p>Classful routing protocols (B)</p> Signup and view all the answers

What metric determines the number of hops to a destination in routing protocols?

<p>Hops (B)</p> Signup and view all the answers

Which of the following protocols is a Hybrid routing protocol?

<p>EIGRP (A)</p> Signup and view all the answers

What is a disadvantage of using dynamic routing protocols?

<p>Slower convergence than static routing. (C)</p> Signup and view all the answers

Which protocol is classified as an Exterior Gateway Protocol (EGP)?

<p>BGP (B)</p> Signup and view all the answers

Static routes have a higher administrative distance than directly connected routes.

<p>True (A)</p> Signup and view all the answers

Link-state protocols like RIP are known for converging faster than distance-vector protocols.

<p>False (B)</p> Signup and view all the answers

The longest prefix match is used in the routing table lookup process to determine the best route.

<p>True (A)</p> Signup and view all the answers

EIGRP has a lower administrative distance than OSPF.

<p>True (A)</p> Signup and view all the answers

RIP is considered a link-state protocol.

<p>False (B)</p> Signup and view all the answers

The speed of convergence is faster for distance-vector protocols compared to link-state protocols.

<p>False (B)</p> Signup and view all the answers

A network is said to be converged when all routers have incomplete routing information.

<p>False (B)</p> Signup and view all the answers

Dynamic routing protocols build a full topology map of the network using Distance-Vector Protocols.

<p>False (B)</p> Signup and view all the answers

Classful protocols support Variable Length Subnet Masking (VLSM) and Classless Inter-Domain Routing (CIDR).

<p>False (B)</p> Signup and view all the answers

The maximum hop count for RIP is 30.

<p>False (B)</p> Signup and view all the answers

Link-State protocols generally have slower convergence times compared to Distance-Vector protocols.

<p>False (B)</p> Signup and view all the answers

EIGRP utilizes the Dijkstra's algorithm for calculating the shortest path.

<p>False (B)</p> Signup and view all the answers

Dynamic routing reduces administrative overhead by requiring less manual configuration.

<p>True (A)</p> Signup and view all the answers

The Bellman-Ford algorithm is used by OSPF for its routing updates.

<p>False (B)</p> Signup and view all the answers

Interior Gateway Protocols are used for routing between different Autonomous Systems.

<p>False (B)</p> Signup and view all the answers

Flashcards

Route Types

Routes are classified as directly connected, static, or dynamically learned.

Longest Prefix Match

A routing lookup method that finds the best matching route based on the longest matching network prefix.

Administrative Distance

A number that reflects the trustworthiness of a routing protocol's information.

Directly Connected Route

A route learned by a router directly from a connected interface.

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RIP

A distance-vector routing protocol with an administrative distance of 120.

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Routing Table Convergence

The time it takes for all routers to have consistent routing information.

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Convergence Speed

Link-state protocols like OSPF converge faster than distance-vector protocols like RIP.

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Dynamic Routing

Automatically finds and keeps routing information updated.

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Distance-Vector Protocols

Routing protocols that share routing updates with neighbors.

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Link-State Protocols

Routing protocols creating a full network map.

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RIP (Routing Information Protocol)

Distance-vector protocol updating every 30 seconds, max 15 hops.

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OSPF (Open Shortest Path First)

Link-state protocol with fast convergence using Dijkstra's algorithm.

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Routing Metrics

Factors (hops, bandwidth, delay) used to find best route.

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Classful vs. Classless Protocols

Protocols handling subnet masks differently; classless sends subnet masks.

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Static Route

A manually configured route that doesn't change dynamically. It's used for specific paths or when dynamic routing is unavailable.

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Routing Lookup

The process of finding the best route for a packet based on its destination IP address.

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Advantages of Dynamic Routing

Reduces administrative overhead, adapts to network changes, and is well-suited for large networks.

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Disadvantages of Dynamic Routing

Consumes router resources, has slower convergence than static routing, and can be harder to troubleshoot.

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Routing Protocol Classifications

Routing protocols categorized into classful/classless, interior/exterior gateway, and by metric types.

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Study Notes

Dynamic Routing Overview

  • Dynamic routing protocols automatically discover and maintain routing information for network paths.
  • They discover remote networks, update routing tables continuously, and choose optimal paths for traffic.
  • Dynamic routing adjusts to network changes quickly.

Advantages and Disadvantages

  • Advantages:
    • Reduces administrative workload for network configuration.
    • Adapts automatically to topology changes in the network.
    • Suitable for large, complex networks.
  • Disadvantages:
    • Requires router processing power (CPU) and bandwidth.
    • Convergence (updating the network to reflect changes) is slower than with static routes.
    • Troubleshooting can be more complex.

Dynamic Routing Protocol Types

  • Distance-Vector Protocols:
    • Exchange routing updates with directly connected neighbors (like RIP, EIGRP).
    • Do not maintain a complete network map.
    • Metrics typically involve hops, cost, or delay.
  • Link-State Protocols:
    • Build a complete network topology map and use it to calculate the best paths (like OSPF, IS-IS).
    • Use algorithms like Dijkstra's to find the shortest path.
  • Hybrid Protocols:
    • Combine elements of Distance-Vector and Link-State protocols (like EIGRP).

Routing Protocol Classifications

  • Classful vs. Classless:
    • Classful protocols (like RIPv1, IGRP) don't include subnet mask information.
    • Classless protocols (like RIPv2, EIGRP, OSPF) support Variable Length Subnet Masking (VLSM) and Classless Inter-Domain Routing (CIDR).
  • Interior Gateway Protocols (IGPs):
    • Used within an autonomous system (a group of networks managed by a single organization).
    • Examples include RIP, EIGRP, and OSPF.
  • Exterior Gateway Protocols (EGPs):
    • Used between autonomous systems.
    • Border Gateway Protocol (BGP) is a common EGP.

Key Routing Metrics

  • Hops: Number of routers between source and destination.
  • Bandwidth: Capacity of the communication link.
  • Delay: Time taken to traverse a link.
  • Reliability: Stability of the link.
  • Load: Network utilization.

Distance-Vector Protocols

  • RIP:
    • Updates every 30 seconds.
    • Maximum hop count of 15.
    • Uses the Bellman-Ford algorithm for path calculation.
  • EIGRP:
    • Uses the DUAL algorithm for faster convergence.
    • Supports multiple network layers.
    • Updates only when network changes occur.
  • OSPF:
    • Uses Link State Advertisements (LSAs) to build a detailed network map.
    • Faster convergence using Dijkstra's algorithm.
  • IS-IS:
    • Commomly used in service provider networks.
    • Similar functionality to OSPF.

Routing Table Concepts

  • Route Types:
    • Directly connected, static, and dynamically learned routes.
  • Lookup Process:
    • Routers use the longest prefix matching rule to select the best route for a destination.
    • Routes with the lowest administrative distance are prioritized.

Administrative Distance

  • Used to determine the trustworthiness of a routing source.
  • Directly connected routes have the lowest distance (0).
  • Static routes have a distance of 1.
  • Other protocols, like RIP, OSPF, and EIGRP, have their specific administrative distances.

Convergence

  • Network convergence occurs when all routers have consistent and accurate routing information.
  • Link-state protocols (like OSPF) usually converge faster than distance-vector protocols (like RIP).

Study Focus

  • Understand the key differences between RIP, EIGRP, and OSPF.
  • Learn how different metrics and administrative distances influence routing decisions.
  • Practice analyzing routing tables and tracing packets through the network.

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Description

Test your understanding of dynamic routing protocols, their advantages and disadvantages, and various types of distance-vector protocols. This quiz covers key concepts essential for network management and configuration. Challenge yourself to see how well you grasp the complexities of dynamic routing in networks.

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