Important Port Numbers

HTTP ———- 80

FTP ———— 20,21

TelNet ———- 23

SMTP ———- 25

DNS ———– 53

TFTP ———– 69

SNMP ———- 161

RIP ————- 520

IMAP 4——— 143

IMAP 3 ——— 220

RPC ———— 135

LDAP ———- 389

Net Stat ——– 15

WINS ———- 42

BootP ———- 67

DHCP ———- 68

POP2 ———- 109

POP3 ———- 110

Net BIOS —— 139

SSL(HTTPS) — 443

SQL Server —- 1433

NFS ———— 2049

SSH ———— 22

RAP ———– 38

BGP ———– 179

Enabling & disabling the USB port in windows via registry


HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Services > USBSTOR

Now at the right side double click on Start.

To block USB storage Medias, change the value data to 4.

If you want to unblock USB storage Medias just navigate to the same location and change th value data to 3.

If you don’t want to bother tweaking registry then I’ve made a simple program to Block and Unblock USB device.

System state data Backup

You can choose to do a System State backup, and this is very important if you want to be able to get a functional system in the event of a crash. This table shows which components that are backed up on a System State backup.

Component Included in System State Backup
Boot files and system files Yes
Registry Yes
COM+ Yes
System files under Windows File Protection Yes
Active Directory, directory service If it’s a domain
SYSVOL directory If it’s a domain controller
IIS Metadirectory If it’s installed
Certificate Services database If it’s a Certificate Services server
Cluster Service information If it’s within a cluster

You don’t have to know which of these components to backup. The Backup Utility included in Windows Server 2003 will choose this when you perform a System State backup. Likewise you cannot choose which components to restore; all the System State data will be restored. This is due to dependencies among the components. You can however restore the System State data to an alternative location. This does not mean that you can restore it to another computer and think it will work as the one you backed up. Not all data is restored when you restore to an alternative location. Only the components System boot files, registry files, SYSVOL directory files and Cluster database information files will be restored.

Types of backups

  • Normal backup
    The normal backup is normal (surprised?). So, what does this mean? It simply means that it copies all the files you have marked to be backed up, and marks the files as having been backed up. You also only need the most recent copy of the backup file (other types of backups requires several files, see below) to restore. This type is usually what you use the first time you backup files.
  • Incremental backup
    The incremental backup backs up only those files that have been created or changed since last incremental or normal backup. It also marks the files as having been backed up. A combination of Normal backups and Incremental backups is common, and also a very good combination. It also requires the least amount if storage space and is fast for backing up the data. The disadvantage of this is that it’s time-consuming to recover files, simply because you need the last normal backup set and all incremental backup sets, which can be stored on several backup drives or tapes.
  • Differential backup
    The differential backup is similar to the incremental backup and only copies files that have been created or changed since the last normal or incremental backup. No, it wasn’t a typo, it doesn’t check if a differential backup has been run. This is because differential backups does not mark files as having been backed up. A combination of differential backups and normal backups is more time-consuming concerning the backup part then the incremental + normal backups are. But on the other hand it is faster to restore data because all you need is the last normal backup and the last differential backup.
  • Copy backup
    A copy backup copies all the files you have selected, but does not mark the files as having been backed up. This backup type is useful when you must backup single files between normal and incremental backups because it does not affect these operations.
  • Daily backup
    The daily backup copies all the files that you have selected that have been modified on the day, without marking the files as having been backed up.

ITIL Process

IT Service Support

  • Configuration Management – physical and logical perspective of the IT infrastructure and the IT services being provided

  • Change Management– standard methods and procedures for effective managing of all changes

  • Release Management– testing, verification, and release of changes to the IT environment

  • Incident Management– the day-to-day process that restores normal acceptable service with a minimal impact on business

  • Problem Management – the diagnosis of the root causes of incidents in an effort to proactively eliminate and manage them

  • Service Desk (Function)– a function not a process, this provides a central point of contact between users and IT


windows Interview questions part-1

1.  Split brain DNS

2.  Explain about Cluster Heartbeat.

3.  Requirements of Cluster.

4.  What are different mode to connect a remote server?

5.  Any knowledge on Patching tools / ticketing tools

6.  how will you troubleshoot blue screen error

7.  how will you find server reeboot is unexpected or scheduled

8.  How will you team network cards.

9.  what is RIB , DRAC, ILO

10. What is advantage of Network teaming.

11. what is advantage of using patching tools.

12. what is use of WSUS server.

13. how to backup DHCP server.

14. what is forward look up ZONE , reverse lookup zone.

15. What is use of Stub zone in DNS

16. List records in DNS entries

17. any idea about Monitoring tools like MOM , TIVOLI , HP SIM.

18. list FSMO roles

19. Which FSMO role cannot be in Global catalog server

20. what happen if all servers have global catalog server

21. Difference between Windows 2000 server and 2003 server

22. what are different types of Windows 2003 editions

23. how many processor does Windows 2003 Datacenter edition supports

24. Use of Page file in windows

25. what are the files required to boot the server.

26. what is the file name of Adtive directory database.

27. What are different types of backup.

28. difference between Differential backup and incremental backup

29. how will you restore a server using system state backup.

30. list the files that are backedup in system state backup

31. what is ASR backup.

32. What is the procedure to recover a server using ASR backup.

33. list and Active directory tool to migrate a domain to other domain.

34. difference between domain and workgroup

35. what is DNS server

36. What is DHCP server

37. What is RAID

38. difference between RAID 5 and RAID 1

39. What is difference between RAID 10 & RAID 01

40. how will you configure RAID Array controller.

41. What is LOGICAL VOLUME and PHYSICAL volume

42. What is difference between partition and volume.

43. What is boot partition and windows partition

44. What is difference between NFTS permission and Share Permission

45. What is difference between FAT 32 and NTFS

46. how will you configure and enable file Quota for all users in active directory

47. what is port number for DNS, DHCP, FTP, HTTP, TELNET

48. How will you schedule a backup job in Windows 2003

49. what will you do if you are not able to take RDP session of a remote server

50. what is RDP port number

51. what happen if 2 disk fails in RAID 5

52. do you need reboot for the server to change a faulty disk in RAID Array

53. If any server hardware fail’s How will you get alert notification & how to do that

54. Purpose of RID master , What happen when RID master fails

55. What are different types of Trust available.

56. what is REALM Trust

57. what is dhcp scope and super scope

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