1. What is Reverse Proxy & transperent proxy?
2. What is difference between statefull firewall and stateless firewall ?
3. What is cifs? is it protocol or filesystem? explain
4. What is snort ?
5. what is difference between IPS & IDS ?
6. What is Crashdump?
7. What is clustering ? What are types ?
8. What is fencing and which devices are used for fencing?
9. If I give command –> ls –> but nothing come on console.. tell me the possibilities that why this could have happened?
10. Difference between RAID 5 & 6 ? What if 2 disks fails in RAID 5 ? Can we make RAID 5 with 5 disks?
11. How to print 1 to 100 in bash without using any loop or scripting?
12. How to stop module to load in RAM?
13. How to call one shellscript in another?
14. How to copy or to do 1 task on 100s of server in minimum time?
15. How to use 4 NICs to increase network speed?
16. tell command to write 10GB file with block size of 128k?
17. How to test network speed between Network?
18. How to do LDAP replication?
19. What is UpdateDN & BindDN in OpenLDAP?
20. How to configure HTTPS websites in Apache?
21. How to configure DNS ? What is Authorative DNS & Root DNS?
22. Which parameters to tune for better Linux performance?
23. What is NMap & why it is used?
24. How to replicate MySQL?
25. How to configure HAproxy?
26. What is tcp_syncookies?
27. Which kernel parameters to modify to increase network packet size?