Which type of DNS record is responsible for email?

Which type of DNS record is responsible for email?

• CName record
• A Record
• MX record
• NS record 

EXPLANATION

A mail exchanger record (MX record) specifies the mail server responsible for accepting email messages on behalf of a domain name. It is a resource record in the Domain Name System (DNS). It is possible to configure several MX records, typically pointing to an array of mail servers for load balancing and redundancy.

Read More

Systems running 32-bit versions of Windows cannot address more than how much total RAM?

Systems running 32-bit versions of Windows cannot address more than how much total RAM?

• 2GB
• 8GB
• 4GB
• 4MB 

EXPLANATION

 on a 32bit machine the maximum amount of memory usable is around 4GB. Actually, depending on the OS it might be less due to parts of the address space being reserved: On Windows you can only use 3.5GB for example. On 64bit you can indeed address 2^64 bytes of memory.

Read More

Convert an IP Address of 192.168.1.10 to binary,

Convert an IP Address of 192.168.1.10 to binary,

• 11000000 10101000 00000001 00001010
• 11000000.10101000.00000001.00001010
• 11000000.10101000
• 10100000 

EXPLANATION

Calculation results

• Address
  192.168.1.10
  11000000.10101000.00000001.00001010
• Netmask
  255.255.248.0 = 21
  11111111.11111111.11111000.00000000
• Wildcard
  0.0.7.255
  00000000.00000000.00000111.11111111
•  
• Network
  192.168.0.0/21
  11000000.10101000.00000000.00000000
  Class C
• Broadcast
  192.168.7.255
  11000000.10101000.00000111.11111111
• First IP
  192.168.0.1
  11000000.10101000.00000000.00000001
• Last IP
  192.168.7.254
  11000000.10101000.00000111.11111110
• Hosts/Net
  2046
  nnnnnnnn.nnnnnnnn.nnnnnhhh.hhhhhhhh
  Private

Read More

In virtualization, what does the .VHD file extension stand for?

In virtualization, what does the .VHD file extension stand for?

• Virtual High Density
• Video Hard Drive
• Virtual Hard Disk
• Virtual Hazard Detection 

EXPLANATION

VHD is the file extension for a disk image file format for storing the complete contents of a hard drive. VHD stands for virtual hard disk. The disk image, sometimes called a virtual machine, replicates an existing hard drive and includes all data and structural elements.

VHDX is a Hyper-V virtual hard disk (VHD) format found in Windows Server 2012. The main advantage of switching to VHDX is its increased storage capacity of 64 TB (terabytes), instead of VHD's standard storage limit of 2 TB.

 

Read More

What does LCD stand for?

What does LCD stand for?

• Liquid Crisp Display
• Light Crystal Display
• Liquid Crystal Display
• Liquid Crystal DipSwitch 

EXPLANATION

 LCD (liquid crystal display) is the technology used for displays in notebook and other smaller computers. Like light-emitting diode (LED) and gas-plasma technologies, LCDs allow displays to be much thinner than cathode ray tube (CRT) technology.

Read More