Sai Krishna Kalyanapu IT System Admin

In this post we will see how to reset Windows 7 administrator password. As an example I have got a computer installed with Windows 7 professional with SP1 operating system. This machine is a not a part of any domain and is a part of workgroup . There are lot of tools that are available online that will help you to recover or reset the Windows 7 password. In this post I will show a simple technique to reset administrator password of windows7  without using any tools. We know that Windows comes with a built-in utility called  Utilman . Utilman, an executable file that allow users to configure the accessibility  option  like Magnifier, High contrast theme, Narrator and On-Screen Keyboard before they log onto the system. Utilman file resides in the System32 folder which is located inside windows folder. If you swap the  Utilman  file with command prompt, you have access to the command prompt running SYSTEM privileges. I will be summarizing the steps that we will be performing in

In this post we will see how to upgrade Windows Server 2008 R2 to Windows Server 2012. It’s been an year that Microsoft has released Windows Server 2012, when Windows Sever 2012 was released the IT professionals were eager to know what’s new in Windows Server 2012 and i was one of them. Microsoft releases all of its operating systems in multiple editions, which provides consumers with varying price points and feature sets. While choosing the edition make sure you choose the edition that suits your requirements. Before we go ahead and deploy Server 2012, let’s take a look at editions of Windows Server 2012. 1)  Windows Server 2012 Datacenter Edition  – The Datacenter edition is designed for large and powerful servers with up to 64 processors and fault-tolerance features such as hot add processor support. This edition is available only through the Microsoft volume licensing program and from original equipment manufacturers bundled with a server. 2)  Windows Server 2012 Standard Ed

1.    IPv6 (Internet Protocol version 6) is a set of specifications from the Internet Engineering Task Force (IETF) that's essentially an upgrade of IP version 4 (IPv4). The basics of IPv6 are similar to those of IPv4. Devices can use IPv6 as source and destination addresses to pass packets over a network, and tools like ping work for network testing as they do in IPv4, with some slight variations. 2.    The most obvious improvement in IPv6 over IPv4 is that IP addresses are lengthened from 32 bits to 128 bits. This extension anticipates considerable future growth of the Internet and provides relief for what was perceived as an impending shortage of network addresses. 3.    IPv6 address types: ·      Unicast: one to one ·      Multicast: one to many ·      Anycast: one to nearest communication. 4.    Unicast address types: ·      Global unicast (are globally routable, same as IPv4 public addresses) Range (2000:: /3) ·      Link local (to communicate in same s

1.    NAT stands for Network Address translation. 2.    PAT stands for Port Address translation. 3.    NAT/PAT came to use because private IP addresses are not allowed on internet. So we have to somehow convert private IP addresses into public IP addresses and vice versa. 4.    NAT & PAT is used to convert private IP address into public IP address and vice-versa. 5.    We configure NAT/PAT on our edge router from where traffic will enter and exit our network. 6.    Private IP range: ·      Class A (10.0.0.0 – 10.255.255.255) ·      Class B (172.16.0.0. – 172.31.255.255) ·      Class C (192.168.0.0. – 192.168.255.255) 7.    NAT is of two types: ·      Static NAT (one to one mapping) ·      Dynamic NAT (many to many mapping) 8.    In Static NAT, we have to convert each private IP address of our network into public IP address manually. 9.    In Dynamic NAT, we will create an Access list and will place private IP address in that list. Then we will have a