Networking Questions

1. Explain different OSI layers?
2. At which layer network Router and network Switch works. Explain the difference between the two?
3. Why 'ping' command is used?
4. How do you use a routing table and for what?
5. What is the max size of ethernet frame?
6. What are transport layer protocol? What are the basis for selection of transport layer protocol?
7. Explain TCP/IP stack?
8. What is a Default gateway?
9. RFC stands for .....?
10. What is DHCP and how it is used?
11. What is DHCP relay?
12. How you can make windows PC as DHCP client?
13. What is PPPoE protocol ? In which RFC it is defined ?
14. What is LAN/WAN?
15. How ethernet protocol works ?
16. What is crossover cable and straight through cable?
17. What is full duplex and half duplex modes of Ethernet ?
18. What is loopback address?
19. What are private ip addresses? Give range and examples.
20. Explain the difference between unicast, multicast and broadcast address? give example of each?
21. What is VLAN ? How it works?