Module 1.1 - OSI and TCP/IP Models

Module 1.2 - Devices & Protocols in Relation to OSI Model

Module 1.3

Module 1.4

Module 1.5 and 1.6

Module 1.7

Module 1.8

Module 1.9

Module 2.1

Module 2.2

Module 2.3

Module 2.4

Module 2.5

Module 2.6

Module 3.1 and 3.2

Module 3.3

Module 3.4

Module 3.5

Module 3.7

Module 3.8

Module 4.1

Module 4.2

Module 4.3

Module 4.4

Module 4.5

Module 4.6

Module 5.1

Module 5.2

Module 5.3

Module 5.4

Module 5.5

Module 5.6

Routing Metrics

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Routing Metrics

Routing Metrics

This lesson discusses routing metrics and the qualities used to determine the best path:

  • Hop count: how many other routers does a signal need to pass?
  • Maximum transmission Unit (MTU): The maximum size of a single packet we can send
  • Casts: reliability
  • Latency: The amount of delay we have on a link.

Routers use different protocols to determine the best path:

  • Link state: This is a cost-based protocol. An example of a link state is Open Shortest Path First (OSPF) protocol
  • Distance Vector: Just based on the number of ‘hops’
  • Hybrid: A mixture of distance vector and link state, it uses ‘hop’ count and cost
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