What is Preamble in Ethernet header?

Related questions

1. Is voice VLAN tagged or untagged?
2. How do you communicate VLAN 1 to VLAN 2?
3. What is untagged VLAN?
4. What is VLAN and VPN?
5. What are VLAN tags?
6. Why is VLAN needed?
7. What is VLAN hopping attack?
8. What is VLAN ID range?
9. How many bytes is an Ethernet header?
10. What is the size of Ethernet header?

Tags

1. #frame
2. #preamble
3. #followed
4. #allowing
5. #network
6. #which
7. #synchronize
8. #pattern
9. #devices
10. #ethernet
11. #incoming
12. #seven
13. #alternating
14. #easily
15. #consists
16. #receiver
17. #packet
18. #clocks
19. #their