IT Support Skills Training

IT Support Skills Training

This content is a part JSS Guided IT Professional skills development program. Please follow the IT mentor in your discord server to complete this training.

Virtualization is the ability to install and run multiple operating systems concurrently on a single physical machine. Most virtualization solutions include the following components:

Physical Machinephysical machine contains the actual system hardware, such as the hard disk drive(s), optical drive, RAM, processors, etc.

hypervisor is a thin layer of software that resides between the virtual operating system(s) and the hardware. A hypervisor allows virtual machines to interact with the hardware without going through the host operating system. A hypervisor manages access to system resources such as:

  • CPU
  • Storage
  • RAM

Commonly used hypervisor types include:

  • VMware Workstation and ESX (made by VMware)
  • Hyper-V (made by Microsoft)
  • XEN (open source)
  • Oracle VirtualBox
  • Kernel-based Virtual Machine (KVM)
Virtual Machinevirtual machine is a software implementation of a computer that executes programs like a physical machine. The virtual machine appears to be a self-contained and autonomous system.
Virtual Hard Disk (VHD)

virtual hard disk (VHD) is a file that is created within the host operating system and that simulates a hard disk for the virtual machine. Different hypervisors use different virtual hard disk file formats:

  • Virtual Disk Image (VDI): Oracle VirtualBox
  • Virtual Machine Disk (VMDK): VMware products
  • Virtual Hard Disk (VHD): Microsoft Hyper-V

Types of virtualization include the following:

FullIn full virtualization, the virtual machine completely simulates a real physical host. This allows most operating systems and applications to run within the virtual machine without being modified in any way.

In partial virtualization, only some of the components of the virtual machine are virtualized. Be aware of the following:

  • The operating system uses some virtual components and some real physical hardware components in the actual device where the hypervisor is running.
  • The operating system or application must be modified to run in a partial virtualization environment.

In para-virtualization, the hardware is not virtualized. Be aware of the following:

  • All of the guest operating systems running on the hypervisor directly access various hardware resources in the physical device; components are not virtual.
  • The guest operating systems run in isolated domains on the same physical hardware.
  • The operating system or application must be modified before they can run in a para-virtualization environment.



Learn from this demo lab

In the JSS program, you will get access to TestOut two complete courses, practice labs for one year, and for the Internship project, members will get JSS servers for seven days to complete the project.

Start lab

Active Directory is a centralized database that contains user account and security information. In a workgroup environment, authentication, security, and management all take place on each individual computer, with each device independently storing information about users and configuration settings. Using Active Directory, all computers share the same central authentication and configuration database.

An Active Directory implementation uses the following components:

Trees and Forests

Multiple domains are grouped together in the following relationship:

  • tree is a group of related domains that share the same contiguous DNS namespace.
  • forest is a collection of related domain trees. The forest establishes the relationship between trees that have different DNS name spaces.

domain is an administratively-defined collection of network resources that share a common directory database and security policies. The domain is the basic administrative unit of an Active Directory structure.

  • Database information is replicated (shared or copied) within a domain.
  • Security settings are not shared between domains.
  • Each domain maintains its own set of relationships with other domains.
  • Domains are identified using DNS names.
    • The common name is the domain name itself.
    • The distinguished name includes the DNS context or additional portions of the name.

Depending on the network structure and requirements, the entire network might be represented by a single domain with millions of objects, or the network might require multiple domains.

Organizational Unit (OU)

An organizational unit is like a folder that subdivides and organizes network resources within a domain. An organizational unit:

  • Is a container object
  • Can contain other OUs or any type of leaf object (e.g., users, computers, and printers)
  • Can be used to logically organize network resources
  • Simplifies security administration.
Built-in Containers

Like OUs, generic built-in containers are used to organize Active Directory objects. However, built-in container objects have several differences:

  • They are created by default.
  • They cannot be created, moved, renamed, or deleted.
  • They have very few editable properties.

Within Active Directory, each resource is identified as an object. Common objects include:

  • Users
  • Groups
  • Computers

You should know the following about objects:

  • Each object contains attributes (i.e., information about the object, such as a user’s name, phone number, and email address) which are used for locating and securing resources.
  • Active Directory uses DNS for locating and naming objects.
  • Container objects hold other objects, either other containers or leaf objects.
Domain Controller

domain controller is a Windows server that holds a copy of the Active Directory database.

  • A domain controller is a member of only one domain.
  • A domain can contain multiple domain controllers. Each domain controller holds a copy of the Active Directory database.
  • Any domain controller can make changes to the Active Directory database.
  • Replication is the process of copying changes made to the Active Directory database between all of the domain controllers in the domain.

The Active Directory database resides in a file, called Ntds.dit, on the domain controller. This file stores all Active Directory data.

  • Add helpdesk account with admin rights 2:40
  • Danish to meet with helpdesk account Hand over accounts 27:43
  • How to join computer to a domain 1:01:15
  • How to get Basic details about machine 1:20:05
  • How to use Some commands in command line to get some information 1:22:20
  • How to check something in graphical way 1:28:08 Command ipconfig space DNS 1:30:29
  • Command Lookup 1:34:08
  • Command Netstat 1:35:29
  • How to resolve slow system problem 1:37:13
  • Window graphical interface tools 1:44:51
  • How can you manage all of users from machine 1:54:24
  • How do we add features in computers 1:58:20
  • Why do you need to know about active directory 2:03:37
  • Real world ticket 2:05:17 Create a new staff member using AD 2:13:45
  • How to add new machine and configure 1:38:00
  • Where can I find group policy 2:39:24
  • How to unlock ,locked account 2:54:13
  • First Example ( Group policy) 3:13:14
  • 2nd Example (password policy) 3:23:38

Learn from this demo lab

In the JSS program, you will get access to TestOut two complete courses, practice labs for one year, and for the Internship project, members will get JSS servers for seven days to complete the project.

Start lab