Category Archives: Windows

What is the difference between MBR and GPT?

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I believe most of the IT folks see this two type of partition table format (MBR and GPT) when you creating new partition. But do your guy really understand what is the difference between this two partition table format?

Here i going to share with you some of the key difference between this two partition table format:-

 Master Boot Record (MBR)

  • A partition supports a maximum of four primary partitions per drive
  • A partition can have maximum of 2 terabytes (TB) (2.19 x 10^12 bytes).

Note: You can use the MBR partition table format for disk drives that never surpass 2 TB in size. This provides you with a bit more space, because GPT requires more disk space than MBR.

GUID Partition Table (GPT)

  • GPT supports a maximum of 128 partitions per drive
  • A partition can have up to 18 exabytes (EB).

Note: If your hard disk is larger than 2 TB, you must use the GPT partition table format. To boot from a GPT partition table, please make sure your BIOS able  support GPT.

Troubleshooting DNS issue with Nslookup command

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When troubleshooting DNS problem, Nslookup is used to perform DNS queries and to examine the contents of zone files on local and remote servers.

Nslookup is a standard command-line tool which available on Windows, Linux and Mac OS platform. Nslookup offers you the ability to perform query testing of DNS servers and to obtain detailed responses at the command prompt.

To use nslookup in command-line mode, enter the following in the command prompt window:

nslookup DNS_name_or_IP_address server_IP_address

This command will look up a DNS name or address using a server at the IP address you specify.”

Here i going to show few examples on using the nslookup command. Continue reading →

What is Automatic Private IP Addressing (APIPA)

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I believe all of you might noticed that your Windows Machine sometime will get IP address between 169.254.0.0 – 169.254.255.255.

apipa ip

Do you really know why your Windows Machine will get the IP between 169.254.0.0 – 169.254.255.255?

IP Address range 169.254.0.0-169.254.255.255 is referring to Automatic Private IP Addressing (APIPA).  The Internet Assigned Numbers Authority (IANA) has reserved 169.254.0.0-169.254.255.255 for Automatic Private IP Addressing.

In a scenario when there is no DHCP server on the network or the DHCP server is not available, Windows uses APIPA to automatically assign itself an IP address in the address range between 169.254.0.0 and 169.254.255.255. Because APIPA does not configure the computer with DNS and default gateway settings, computers with assigned APIPA addresses have limited networking functionality. APIPA can also be used for troubleshooting DHCP. If the network administrator notices that the computer has an address from the APIPA range, it is an indication that the computer cannot communicate with the DHCP server.