What is the purpose of VLAN frame tagging?

Related questions

1. What is C tag and S tag?
2. What is difference between trunk and access port?
3. What is Port tagging in VLAN?
4. What is VLAN double tagging?
5. What is 802.1 p tagging?
6. What is the maximum VLAN ID?
7. What does tagged VLAN mean?
8. What is Q in Q VLAN tagging?
9. Is native VLAN untagged?
10. What is VLAN tagged and untagged Cisco?

Tags

1. #which
2. #vlans
3. #reaches
4. #tagging
5. #member
6. #trunk
7. #network
8. #belongs
9. #identify
10. #explained
11. #placed
12. #frame
13. #access
14. #switch
15. #forwarded
16. #multiple