What is the correct syntax to run a error fixing check disk in a command prompt?

What is the correct syntax to run a error fixing check disk in a command prompt?

• chkdsk /f
• cd
• ipconfig
• dir 

EXPLANATION

 The cd command, also known as chdir, is a command-line OS shell command used to change the current working directory in operating systems such as Unix, DOS, OS/2, AmigaOS, Windows, and Linux. It is also available for use in shell scripts and batch files. The system call that affects the command in most operating systems is chdir that is defined by POSIX.

In computing, ipconfig in Microsoft Windows is a console application that displays all current TCP/IP network configuration values and can modify Dynamic Host Configuration Protocol and Domain Name System settings.

In computing, dir is a command used for file and directory listing, specifically in the command line interface of the operating systems CP/M, DOS, OS/2, Singularity, Microsoft Windows and in the DCL command line interface used on VMS, RT-11 and RSX-11. The command is also supplied with OS/8 as a CUSP. 

Checks the file system and file system metadata of a volume for logical and physical errors. If used without parameters, chkdsk displays only the status of the volume and does not fix any errors. If used with the /f, /r, /x, or /b parameters, it fixes errors on the volume.

Read More

What is the range of well known ports assigned to common protocols and services

What is the range of well known ports assigned to common protocols and services

• 0-49151
• 1-1023
• 0-49152
• 0-1023 

EXPLANATION

logical connections, provided by the TCP or UDP protocols at the Transport layer, for use by protocols in the upper layers of the OSI model.
 
logical connections, provided by the TCP or UDP protocols at the Transport layer, for use by protocols in the upper layers of the OSI model.

Well Known ports range from 0 to 1023 and are assigned to common protocols and services.

 

Read More

What is the MS-DOS (CMD Prompt) command that enables a user to change the title of their MS-DOS (CMD Prompt) window?

What is the MS-DOS (CMD Prompt) command that enables a user to change the title of their MS-DOS (CMD Prompt) window?

• winid
• set title
• topbar
• title 

EXPLANATION

Launch Command Prompt and type the following command title [name]. This will change your title name instantly,
but you will have to type this each time you launch it.

SOURCE

https://www.addictivetips.com/windows-tips/how-to-change-name-in-the-title-bar-of-command-prompt/

Read More

What is the maximum speed 802.11ac standard can transfer at?

What is the maximum speed 802.11ac standard can transfer at?

• 1.3Gbps
• 0.45Gbps
• 6Gbps
• 450Mbps 

EXPLANATION

802.11ac is the latest generation of IEEE standards. 802.11ac has improved on the previous standards regarding bandwidth. 802.11ac used dual-band wireless technology.

It can support connections using the 5GHz frequency band. 802.11ac supports a maximum speed of 1.3 Gbps when using three streams. This is the first specification have reached the 1 Gb mark and is also called the Gigabit Wi-Fi.

Pros of 802.11ac

1. Supports data transfer rate of 1.3 Gbps
2. Backward compatibility with 802.11b/g/n
3. Highly beneficial in a network with a large number of users.

 

Read More

What is the importance of 12/31/1969 to the IT world?

What is the importance of 12/31/1969 to the IT world?

• New Years Eve
• The first release of Windows 1.0 was shipped
• The Beginning of That 70s Show
• The beginning date of Unix and where it starts counting time from 

EXPLANATION

 Linux is following the tradition set by Unix of counting time in seconds since its official "birthday," -- called "epoch" in computing terms -- which is Jan. 1, 1970.

A more complete explanation can be found in this Wired News article. It explains that the early Unix engineers picked that date arbitrarily, because they needed to set a uniform date for the start of time, and New Year's Day, 1970, seemed most convenient.

 The Unix epoch is midnight on January 1, 1970. It's important to remember that this isn't Unix's "birthday" -- rough versions of the operating system were around in the 1960s. Instead, the date was programmed into the system sometime in the early '70s only because it was convenient to do so, according to Dennis Ritchie, one of the engineers who worked on Unix at Bell Labs at its inception.

Read More