How many bits are used to identify the Class of Service (CoS) marking in a frame?
- 3
- 8
- 24
- 64
Explanation: The 802.1p standard uses the first 3 bits in the Tag Control Information (TCI) field. Known as the Priority (PRI) field, this 3-bit field identifies the Class of Service (CoS) markings. Three bits means that a Layer 2 Ethernet frame can be marked with one of eight levels of priority (values 0–7).
Related exam: 9.6.2 Module Quiz - QoS Concepts
Related exam: CCNA 4 v6 Chapter 6: Check Your Understanding
