What does Amazon EC2 stand for?

What does Amazon EC2 stand for?

• Amazon Elastic Compute Cloud
• Amazon Expensive Cloud Computing
• Amazon Elective Computing Cloud
• Amazon Expert Computing Cloud 

EXPLANATION

Amazon Elastic Compute Cloud

Amazon Elastic Compute Cloud forms a central part of Amazon.com's cloud-computing platform, Amazon Web Services, by allowing users to rent virtual computers on which to run their own computer applications. Wikipedia

 

Read More

What's the term for the removal of deleted objects in Active Directory?

What's the term for the removal of deleted objects in Active Directory?

• Trash collection
• Garbage collection
• Bin removal
• Recycling 

EXPLANATION

 In computer science, garbage collection is a form of automatic memory management. The garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by objects that are no longer in use by the program. Garbage collection was invented by John McCarthy around 1959 to simplify manual memory management in Lisp.

Fundamentals of Garbage Collection: Describes how garbage collection works, how objects are allocated on the managed heap, and other core concepts. Garbage Collection and Performance: Describes the performance checks you can use to diagnose garbage collection and performance issues.

 

Read More

Which of the following is NOT an IPV4 address range reserved for private networks?

Which of the following is NOT an IPV4 address range reserved for private networks?

• 172.16.0.0 - 172.31.255.255
• 163.168.0.0-163.168.255.255
• 192.168.0.0 - 192.168.255.255
• 10.0.0.0 - 10.255.255.255 

EXPLANATION

In the Internet addressing architecture, a private network is a network that uses private IP address space. Both, the IPv4 and the IPv6 specifications define private addressing ranges. These addresses are commonly used for local area networks in residential, office, and enterprise environments. Private IP address spaces were originally defined in an effort to delay IPv4 address exhaustion.

The Internet Assigned Numbers Authority (IANA) reserves the following IP address blocks for use as private IP addresses:

• 10.0.0.0 to 10.255.255.255
• 172.16.0.0 to 172.31.255.255
• 192.168.0.0 to 192.168.255.255

The first set of IP addresses from above allow for over 16 million addresses, the second for over 1 million, and over 65,000 for the last range.

Another range of private IP addresses is 169.254.0.0 to 169.254.255.255, but those addresses are for Automatic Private IP Addressing (APIPA) use only.

 

Read More

What is phishing?

What is phishing?

• A great way to spend a Sunday afternoon
• A type of electronic fraud
• A type of worm
• A type of computer virus 

EXPLANATION

Phishing is the fraudulent attempt to obtain sensitive information such as usernames, passwords, and credit card details, often for malicious reasons, by disguising as a trustworthy entity in an electronic communication. The word is a neologism created as a homophone of fishing due to the similarity of using a bait in an attempt to catch a victim.

Phishing is a cybercrime in which a target or targets are contacted by email, telephone or text message by someone posing as a legitimate institution to lure individuals into providing sensitive data such as personally identifiable information, banking and credit card details, and passwords. 

Read More

Convert 100 from hexadecimal to decimal

Convert 100 from hexadecimal to decimal

• 257
• 256
• 260
• 264 

EXPLANATION

Decimal Number System (Base 10 number system) The decimal number system is also called as Base 10 number system since it has 10 digits (0,1,2,3,4,5,6,7,8,9). We use decimal number system for our day to day calculations. The primary reason why we use decimal system for our daily calculations is that we have 10 fingers. Let’s understand why decimal number system is base 10 with an example. Let’s take a number 132. (132)10=(1∗102)+(3∗101)+(2∗100)=(1∗100)+(3∗10)+(2∗1)=132 Hexadecimal number system (Base 16 number system) works in a similar way. Example: (1F)16=(1∗161)+(F∗160)=(1∗161)+(15∗1)=(31)10Thus, 1F in Hexadecimal is equal to 31 in decimal Hexadecimal Number System (Base 16 number System) Hexadecimal number system is one of the widely used number system by computer system designers and programmers. It is also called as base 16 number system because it has 16 digits (In case of decimal number system, it was 10 digits). https://convert-calculate.com/convert/hexadecimal-to-decimal-converter/

 

Read More

What does LED stand for?

What does LED stand for?

• Lighted electronic display
• Lower energy demand
• Light-emitting diode
• Light-emitting display 

EXPLANATION

LED stands for "light emitting diode." A diode is an electrical component with two terminals which conduct the electricity only in one direction.

What does LED stand for: Light Emitting Diode. LED stands for Light Emitting Diode. LEDs began as exciting but expensive electronic components in the sixties, used in handheld calculators and other similar devices. Through research and development, LED technology advanced, became more efficient and less expensive, until it reached its current form.

Read More

When it comes to virtualization, what does VDI stand for?

When it comes to virtualization, what does VDI stand for?

• Video display interface
• Virtual device infrastructure
• Virtual desktop interface
• Virtual desktop infrastructure 

EXPLANATION

Desktop virtualization

Desktop virtualization is software technology that separates the desktop environment and associated application software from the physical client device that is used to access it.

What is VDI? Virtual Desktop Infrastructure , or VDI, refers to the process of running a user desktop inside a virtual machine that lives on a server in the datacenter. It's a powerful form of desktop virtualization because it enables fully personalized desktops for each user with all the security and simplicity of centralized management.

 

Read More