What type of architecture should you implement if you are setting up a web server that needs to be accessed by both internal employees and external customers?

What type of architecture should you implement if you are setting up a web server that needs to be accessed by both internal employees and external customers?

• NAT
• VLAN
• VPN
• DMZ

EXPLANATION

 In computer security, a DMZ Network (sometimes referred to as a "demilitarized zone") functions as a subnetwork containing an organization's exposed, outward-facing services. It acts as the exposed point to an untrusted networks, commonly the Internet.

 

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You are the system administrator for an organization that has 50 devices. Which IPv4 internal address range should you use on the network?

You are the system administrator for an organization that has 50 devices. Which IPv4 internal address range should you use on the network?

• 10.x.x.x
• 192.168.x.x
• 172.16.x.x
• 172.31.x.x 

EXPLANATION

 IP address classesWith an IPv4 IP address, there are five classes of available IP ranges: Class A, Class B, Class C, Class D and Class E, while only A, B, and C are commonly used. Each class allows for a range of valid IP addresses, shown in the following table.

Class	Address range	Supports
Class A	1.0.0.1 to 126.255.255.254	Supports 16 million hosts on each of 127 networks.
Class B	128.1.0.1 to 191.255.255.254	Supports 65,000 hosts on each of 16,000 networks.
Class C	192.0.1.1 to 223.255.254.254	Supports 254 hosts on each of 2 million networks.
Class D	224.0.0.0 to 239.255.255.255	Reserved for multicast groups.
Class E	240.0.0.0 to 254.255.255.254	Reserved for future use, or research and development purposes.

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Which of the following is part of a database that holds only one piece of data?

Which of the following is part of a database that holds only one piece of data?

• Field
• Report
• File
• Record 

EXPLANATION

In a database table, a field is a data structure for a single piece of data. Fields are organized into records, which contain all the information within the table relevant to a specific entity.

Field The basic unit of database tables that holds one piece of data, such as first name, last name etc.

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What is the transfer rate of a standard USB 2.0 Device?

What is the transfer rate of a standard USB 2.0 Device?

• 250 Mbit/s
• 480 Mbit/s
• 100 Mbit/s
• 1 Gbit/s 

EXPLANATION

The now-aging USB 2.0 standard can theoretically transfer data at a very high 480 megabits per second (mbps), or 60 megabytes per second (MBps). That’s impressive, but not as much as the newer USB 3.0, which can handle up to 5gbps (640MBps)—over ten times as fast as the 2.0 maximum.

Release versions

Name	Release date	Maximum transfer rate	Note
USB 0.7	November 11, 1994	?	Pre-release
USB 0.8	December 1994	?	Pre-release
USB 0.9	April 13, 1995	Full Speed (12 Mbit/s)	Pre-release
USB 0.99	August 1995	?	Pre-release
USB 1.0-RC	November 1995	?	Release Candidate
USB 1.0	January 15, 1996	Full Speed (12 Mbit/s), Low Speed (1.5 Mbit/s)
USB 1.1	August 1998	Full Speed (12 Mbit/s)[35]
USB 2.0	April 2000	High Speed (480 Mbit/s)
USB 3.0/3.1 Gen 1/3.2 Gen 1×1	November 2008	SuperSpeed USB (5 Gbit/s)	Also referred to as USB 3.1 Gen 1[27] and USB 3.2 Gen 1×1
USB 3.1 Gen 2/3.2 Gen 2×1	July 2013	SuperSpeed USB 10Gbps (10 Gbit/s)	Includes new USB 3.1 Gen 2[27] which is later also named USB 3.2 Gen 2×1
USB 3.2 Gen 1×2	August 2017	SuperSpeed USB 10Gbps (10 Gbit/s)	Includes new USB 3.2 Gen 1×2
USB 3.2 Gen 2×2	August 2017	SuperSpeed USB 20Gbps (20 Gbit/s)	Includes USB 3.2 Gen 2×2 multi-link modes[36][not in citation given]
USB 4	TBD Estimated TBA	(40 Gbit/s)

SOURCE

https://www.pcworld.com/article/2360306/usb-3-0-speed-real-and-imagined.html

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What is the main function of BIOS?

What is the main function of BIOS?

• To enable the graphics card
• To load the operating system
• To upgrade drivers
• To enable the network card 

EXPLANATION

BIOS uses Flash memory, a type of ROM. The BIOS software has a number of different roles, but its most important role is to load the operating system.
When you turn on your computer and the microprocessor tries to execute its first instruction, it has to get that instruction from somewhere.

SOURCE

https://computer.howstuffworks.com/bios1.htm

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