CCNP Certification / BCMSN Exam Tutorial: QoS Service Types
To pass the CCNP exams, youve got to master Quality of Service, and the first step in doing so is knowing the differences between the different QoS types.
Now this being Cisco, we can’t just have one kind of QoS! We’ve got best-effort delivery, Integrated Services, and Differentiated Services. Let’s take a quick look at all three.
Best-effort is just what it sounds like – routers and switches making their “best effort” to deliver data. This is considered QoS, but it’s kind of a “default QoS”. Best effort is strictly “first in, first out” (FIFO).
An entire path from Point A to Point B will be defined in advance when Integrated Services are in effect. Integrated Services is much like the High-Occupancy Vehicle lanes found in many larger cities. If your car has three or more people in it, you’re considered a “priority vehicle” and you can drive in a special lane with much less congestion than regular lanes. Integrated Services will create this lane in advance for “priority traffic”, and when that...
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