Computer networksLesson 3 of 5 in the course Network layer and routing

Routing: Forwarding, Protocols, Route Selection, and Optimization

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Routing moves traffic through a network toward its destination. Understanding how routing differs from packet forwarding—and how delivery schemes address recipients—is essential for understanding how the Internet and other networks work.

Routing is the process of selecting a path for traffic through one network or across multiple networks. In packet-switched networks, routing is the higher-level decision that determines where packets should go as they travel from source to destination.

All flashcards

Routing
Selecting a path for traffic to travel from its source toward its destination.
Packet forwarding
Moving a packet from one network interface to another.
Routing table
A record of routes to network destinations and information, such as next hops, used to direct traffic.
Dynamic routing
Automatically building and updating routing tables using information exchanged through routing protocols.
Anycast
Sending a message to one member of a group that shares a destination address, often the member considered nearest.

Quiz questions

  1. When two routes were learned through the same routing protocol, which route is typically preferred if other relevant criteria are equal?Answer: The route with the lower metric
  2. When two IP routes match a destination address, which route is generally preferred first?Answer: The route with the longest matching prefix
  3. What is a distinguishing feature of OLSR in mobile ad hoc networks?Answer: It uses multipoint relays to help disseminate topology information.
  4. What can happen when an ISP uses hot-potato routing?Answer: It may reduce the distance traffic travels within its network while increasing end-to-end delay.
  5. How do distance-vector nodes typically learn routes to destinations beyond their direct neighbors?Answer: They exchange destination and cost estimates with neighboring nodes.

Based on the Wikipedia article Routing, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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