Virtualisation uses hardware and software to create virtual versions of servers, desktops, networks, storage and memory. This allows one physical server to appear as many servers, or one desktop to run multiple operating systems simultaneously. Server virtualisation improves resource utilisation and reduces costs. Popular virtualisation platforms include VMware ESXi and Microsoft Hyper-V. While virtualisation offers advantages like increased flexibility and scalability, it requires new skills and adds some overhead.
Need for Virtualization – Pros and cons of Virtualization – Types of Virtualization –System VM, Process VM, Virtual Machine monitor – Virtual machine properties - Interpretation and binary translation, HLL VM - supervisors – Xen, KVM, VMware, Virtual Box, Hyper-V.
The process of virtualization enables the creation of virtual forms of servers, applications, networks and storage. The four main types of virtualization are network virtualization, storage virtualization, application virtualization and desktop virtualization.
Need for Virtualization – Pros and cons of Virtualization – Types of Virtualization –System VM, Process VM, Virtual Machine monitor – Virtual machine properties - Interpretation and binary translation, HLL VM - supervisors – Xen, KVM, VMware, Virtual Box, Hyper-V.
The process of virtualization enables the creation of virtual forms of servers, applications, networks and storage. The four main types of virtualization are network virtualization, storage virtualization, application virtualization and desktop virtualization.
This is summary on Virtualization. It contains benefits and different types of Virtualization. For example:Server Virtualization, Network Virtualization, Data Virtualization etc.
In recent years, we have seen an overwhelming number of TV commercials that promise that the Cloud can help with many problems, including some family issues. What stands behind the terms “Cloud” and “Cloud Computing,” and what we can actually expect from this phenomenon? A group of students of the Computer Systems Technology department and Dr. T. Malyuta, whom has been working with the Cloud technologies since its early days, will provide an overview of the business and technological aspects of the Cloud.
Basics of Virtualization:
What is Virtual and Virtualization?
Why do we need Virtualization?
Benefits of Virtualization.
Before and after Virtualization.
How Virtualization works?
Virtual Machines.
VMware
Types of Virtualization:
1. Server Virtualization
2. Storage virtualization
3. I/O virtualization
4. Network virtualization
5. Client virtualization
6. Desktop virtualization
7. Application Virtualization
Virtual versions of servers, applications, networks and storage can be created through virtualization. Its main types include operating system virtualization (VMs), hardware virtualization, application-server virtualization, storage virtualization, network virtualization, administrative virtualization and application virtualization.
Lecture 11 (Virtualization and Load Balancer).pptxShvnhRthOr
Basically, this presentation is about the concept of virtualization and load balancer in cloud computing. It gives us a detailed knowledge about virtualization and load balancer.
Virtualization: Introduction, Characteristics of Virtualized Environment, Taxonomy of Virtualization Techniques, Virtualization and Cloud computing, Pros and Cons of Virtualization, Technology Examples- VMware and Microsoft Hyper-V.
# Internet Security: Safeguarding Your Digital World
In the contemporary digital age, the internet is a cornerstone of our daily lives. It connects us to vast amounts of information, provides platforms for communication, enables commerce, and offers endless entertainment. However, with these conveniences come significant security challenges. Internet security is essential to protect our digital identities, sensitive data, and overall online experience. This comprehensive guide explores the multifaceted world of internet security, providing insights into its importance, common threats, and effective strategies to safeguard your digital world.
## Understanding Internet Security
Internet security encompasses the measures and protocols used to protect information, devices, and networks from unauthorized access, attacks, and damage. It involves a wide range of practices designed to safeguard data confidentiality, integrity, and availability. Effective internet security is crucial for individuals, businesses, and governments alike, as cyber threats continue to evolve in complexity and scale.
### Key Components of Internet Security
1. **Confidentiality**: Ensuring that information is accessible only to those authorized to access it.
2. **Integrity**: Protecting information from being altered or tampered with by unauthorized parties.
3. **Availability**: Ensuring that authorized users have reliable access to information and resources when needed.
## Common Internet Security Threats
Cyber threats are numerous and constantly evolving. Understanding these threats is the first step in protecting against them. Some of the most common internet security threats include:
### Malware
Malware, or malicious software, is designed to harm, exploit, or otherwise compromise a device, network, or service. Common types of malware include:
- **Viruses**: Programs that attach themselves to legitimate software and replicate, spreading to other programs and files.
- **Worms**: Standalone malware that replicates itself to spread to other computers.
- **Trojan Horses**: Malicious software disguised as legitimate software.
- **Ransomware**: Malware that encrypts a user's files and demands a ransom for the decryption key.
- **Spyware**: Software that secretly monitors and collects user information.
### Phishing
Phishing is a social engineering attack that aims to steal sensitive information such as usernames, passwords, and credit card details. Attackers often masquerade as trusted entities in email or other communication channels, tricking victims into providing their information.
### Man-in-the-Middle (MitM) Attacks
MitM attacks occur when an attacker intercepts and potentially alters communication between two parties without their knowledge. This can lead to the unauthorized acquisition of sensitive information.
### Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) Attacks
This is summary on Virtualization. It contains benefits and different types of Virtualization. For example:Server Virtualization, Network Virtualization, Data Virtualization etc.
In recent years, we have seen an overwhelming number of TV commercials that promise that the Cloud can help with many problems, including some family issues. What stands behind the terms “Cloud” and “Cloud Computing,” and what we can actually expect from this phenomenon? A group of students of the Computer Systems Technology department and Dr. T. Malyuta, whom has been working with the Cloud technologies since its early days, will provide an overview of the business and technological aspects of the Cloud.
Basics of Virtualization:
What is Virtual and Virtualization?
Why do we need Virtualization?
Benefits of Virtualization.
Before and after Virtualization.
How Virtualization works?
Virtual Machines.
VMware
Types of Virtualization:
1. Server Virtualization
2. Storage virtualization
3. I/O virtualization
4. Network virtualization
5. Client virtualization
6. Desktop virtualization
7. Application Virtualization
Virtual versions of servers, applications, networks and storage can be created through virtualization. Its main types include operating system virtualization (VMs), hardware virtualization, application-server virtualization, storage virtualization, network virtualization, administrative virtualization and application virtualization.
Lecture 11 (Virtualization and Load Balancer).pptxShvnhRthOr
Basically, this presentation is about the concept of virtualization and load balancer in cloud computing. It gives us a detailed knowledge about virtualization and load balancer.
Virtualization: Introduction, Characteristics of Virtualized Environment, Taxonomy of Virtualization Techniques, Virtualization and Cloud computing, Pros and Cons of Virtualization, Technology Examples- VMware and Microsoft Hyper-V.
# Internet Security: Safeguarding Your Digital World
In the contemporary digital age, the internet is a cornerstone of our daily lives. It connects us to vast amounts of information, provides platforms for communication, enables commerce, and offers endless entertainment. However, with these conveniences come significant security challenges. Internet security is essential to protect our digital identities, sensitive data, and overall online experience. This comprehensive guide explores the multifaceted world of internet security, providing insights into its importance, common threats, and effective strategies to safeguard your digital world.
## Understanding Internet Security
Internet security encompasses the measures and protocols used to protect information, devices, and networks from unauthorized access, attacks, and damage. It involves a wide range of practices designed to safeguard data confidentiality, integrity, and availability. Effective internet security is crucial for individuals, businesses, and governments alike, as cyber threats continue to evolve in complexity and scale.
### Key Components of Internet Security
1. **Confidentiality**: Ensuring that information is accessible only to those authorized to access it.
2. **Integrity**: Protecting information from being altered or tampered with by unauthorized parties.
3. **Availability**: Ensuring that authorized users have reliable access to information and resources when needed.
## Common Internet Security Threats
Cyber threats are numerous and constantly evolving. Understanding these threats is the first step in protecting against them. Some of the most common internet security threats include:
### Malware
Malware, or malicious software, is designed to harm, exploit, or otherwise compromise a device, network, or service. Common types of malware include:
- **Viruses**: Programs that attach themselves to legitimate software and replicate, spreading to other programs and files.
- **Worms**: Standalone malware that replicates itself to spread to other computers.
- **Trojan Horses**: Malicious software disguised as legitimate software.
- **Ransomware**: Malware that encrypts a user's files and demands a ransom for the decryption key.
- **Spyware**: Software that secretly monitors and collects user information.
### Phishing
Phishing is a social engineering attack that aims to steal sensitive information such as usernames, passwords, and credit card details. Attackers often masquerade as trusted entities in email or other communication channels, tricking victims into providing their information.
### Man-in-the-Middle (MitM) Attacks
MitM attacks occur when an attacker intercepts and potentially alters communication between two parties without their knowledge. This can lead to the unauthorized acquisition of sensitive information.
### Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) Attacks
Bridging the Digital Gap Brad Spiegel Macon, GA Initiative.pptxBrad Spiegel Macon GA
Brad Spiegel Macon GA’s journey exemplifies the profound impact that one individual can have on their community. Through his unwavering dedication to digital inclusion, he’s not only bridging the gap in Macon but also setting an example for others to follow.
Multi-cluster Kubernetes Networking- Patterns, Projects and GuidelinesSanjeev Rampal
Talk presented at Kubernetes Community Day, New York, May 2024.
Technical summary of Multi-Cluster Kubernetes Networking architectures with focus on 4 key topics.
1) Key patterns for Multi-cluster architectures
2) Architectural comparison of several OSS/ CNCF projects to address these patterns
3) Evolution trends for the APIs of these projects
4) Some design recommendations & guidelines for adopting/ deploying these solutions.
This 7-second Brain Wave Ritual Attracts Money To You.!nirahealhty
Discover the power of a simple 7-second brain wave ritual that can attract wealth and abundance into your life. By tapping into specific brain frequencies, this technique helps you manifest financial success effortlessly. Ready to transform your financial future? Try this powerful ritual and start attracting money today!
APNIC Foundation, presented by Ellisha Heppner at the PNG DNS Forum 2024APNIC
Ellisha Heppner, Grant Management Lead, presented an update on APNIC Foundation to the PNG DNS Forum held from 6 to 10 May, 2024 in Port Moresby, Papua New Guinea.
1.Wireless Communication System_Wireless communication is a broad term that i...JeyaPerumal1
Wireless communication involves the transmission of information over a distance without the help of wires, cables or any other forms of electrical conductors.
Wireless communication is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices.
Features of Wireless Communication
The evolution of wireless technology has brought many advancements with its effective features.
The transmitted distance can be anywhere between a few meters (for example, a television's remote control) and thousands of kilometers (for example, radio communication).
Wireless communication can be used for cellular telephony, wireless access to the internet, wireless home networking, and so on.
2. Agenda
Part 1: Virtualisation
Concepts
Server virtualisation
Desktop virtualisation
Network virtualisation
Storage / memory virtualisation
Part 2: Practice with Salesforce Cloud Platform
3. Learning Objectives
3
Define and describe virtualisation.
Discuss the history of virtualisation.
Describe various types of virtualisation.
List the pros and cons of virtualisation.
Identify applications that are well suited, as well as
those that are not suited, for virtualisation.
Describe why companies should employ
virtualisation.
4. Virtualisation Defined
4
The use of hardware and software to create the
perception that one or more entities exist, although the
entities, in actuality, are not physically present.
Using virtualisation, we can make one server appear to
be many, a desktop computer appear to be running
multiple operating systems simultaneously, a network
connection appear to exist, or a vast amount of disk
space or a vast number of drives to be available.
5. Server Virtualisation
5
Making one server appear as many. Each virtual server
may run the same or different operating systems.
Server virtualisation provides greater CPU utilisation, a
smaller equipment footprint, less power consumption,
and support for multiple operating systems.
6. Original Servers
Server computers originally required their own chassis, disk,
power supply, and fan. Servers consumed considerable
power, took up considerable space, and generated
considerable heat within the data centre.
6
7. Green Computing
7
Power off devices when they are not in use.
Power up energy-intensive devices, such as laser printers,
only when needed.
Use notebooks when possible instead of desktops.
Use the computer’s built-in power management features.
Minimise unnecessary printing.
Dispose of e-waste (devices, ink cartridges, monitors, and
so on) in compliance with government regulations.
8. Blade Servers
The blade server is designed to fit within a rack with other
blade servers. This reduces the server’s physical footprint,
makes the server easier to cool, and reduces the server’s
power consumption.
8
9. Microsoft Hyper-V
9
Microsoft servers now utilise an underlying technology
called Hyper-V to allow administrators to create virtual
servers.
Advantages:
The ability to consolidate servers and increase CPU utilisation
Enhanced business continuity and disaster recovery
Ease of deploying testing and support environments
Enhanced support for Windows-based client virtualisation
Improved load balancing
Ability to move live virtual machines from one physical server
to another on the fly for load balancing and scalability
10. VMware ESXi
10
VMware is one of the best-known providers of virtualisation
solutions.
ESXi provides the following:
Support for multiple operating systems
Server consolidation
Automated resource management to drive disaster recovery
and service-level agreements
Detail cost-reporting services
Automated load balancing
Centralised management and administration of virtual
servers and the underlying machines
11. Desktop Virtualisation
11
Allows a user to switch between multiple operating systems
on the same computer. (An operating system that resides
within a virtualised environment is known as a guest
operating system.)
Some desktop virtualisation techniques can provide an
operating system environment on demand.
Desktop virtualisation provides support for multiple
operating systems, which is very convenient for software
developers, testers, and help desk support staff.
12. Virtual Desktop
12
The term for a desktop computer that runs two or more
operating systems.
Desktop virtualisation allows a desktop computer to run
two or more operating systems at the same time and allows
a user to quickly switch between the systems.
Advantages:
A single desktop computer can simultaneously run multiple
operating systems.
There is reduced need for duplicate hardware.
Less power is consumed.
13. VMware View
13
A tool for providing virtual desktops on demand. Using
View, system administrators can centralise the on-demand
delivery of an operating system and user-assigned
applications.
Advantages:
Simplified desktop operating system and application
management
Automated desktop provisioning (account generation)
Virtual-desktop image management
Support for a variety of client platforms
14. Virtual Networks
14
Create the illusion that a user is connected directly to a
company network and resources, although no such physical
connection may exist.
Virtual networks are sometimes called virtual private
networks or VPNs. Using a VPN, users can connect to a
network and access the network resources from any
Internet-connected computer.
Virtual networks let network administrators to segment a
network, making different departments such as
management, development, and sales appear to have their
own separate networks.
16. Virtual Local-Area Network
Virtual local-area network (VLAN), which uses special routers
to segment part of the physical network in such a way that
the group appears to have its own private network.
16
17. Virtual Storage
Provides users (and applications) with access to scalable and
redundant physical storage through the use of abstract, or
logical, disk drives or file systems, or a database interface.
Data storage virtualisation hides the physical storage device or
devices from the logical presentation that users or applications
use to access the space.
17
18. Virtual Memory
Virtual memory combines RAM with a page file on disk to
create the illusion, to running programs, of the existenceof
a vast amount of RAM.
18
19. Advantages of Virtual Memory
19
A running program (process) appears to have unlimited
memory.
The operating system can easily manage several different
programs, running at the same time, and keep each
program’s data and instructions secure.
The operating system can take advantage of disk storage,
which is considerably less expensive than RAM.
20. Disadvantages of Virtual Memory
20
The disadvantage of virtual memory is that the paging
process (the process of moving instructions and data
between RAM and disk) adds overhead, mostly because
disk drives are much slower than RAM.
21. Not All Applications Are Appropriate
for Virtualisation
21
Applications with unique hardware requirements: If an
application requires a unique device or hardware device
driver, the virtualisation software may be unable to
support the device.
Graphics-intensive applications: If an application is
graphics intensive, such as a 3-D modeling program, the
virtual device drivers may slow down the I/O processing
to an unacceptable level.
22. Motivation to Virtualise
22
Increased device utilisation (particularly CPU utilisation)
Decreased device footprint
Decreased power consumption
Simplified operating system and application administration
Ease of software provisioning and patch releases
Device and storage scalability
Increased user access to key resources
Increased flexibility in supporting multiple operating system
environments
Improved use and management of software licenses
Improved utilisation reporting, which leads to improved capacity
planning
Improved disaster recovery and business continuity
23. Disadvantages of Virtualisation
23
New staff or staff training may be required to
understand the virtualisation process.
Not all applications are well suited for virtualisation.
The virtualisation process adds slight overhead, which
will make some applications run more slowly.
