Which of the following is not considered a type of storage on a computer?

Which of the following is not considered a type of storage on a computer?

• RAM
• SSD
• CSS
• HDD 

EXPLANATION

CSS is a programming language and not a type of data storage.

SOURCE

https://www.w3schools.com/css/css_intro.asp

Read More

You've been asked to move from IPv4 to IPv6. What is a valid reason for adopting IPv6 over IPv4?

You've been asked to move from IPv4 to IPv6. What is a valid reason for adopting IPv6 over IPv4?

• Change of destination address in the IPv6 header
• Telnet access does not require a password
• Change of source address in the IPv6 header
• No broadcast 

EXPLANATION

With IPv6, devices can build a link-local address automatically.
But notice this address is only used for communications within the local subnetwork, routers do not forward these addresses.

Read More

Linux and Unix systems typically track 3 timestamps in file inodes: atime, ctime, and mtime. The "a" in atime means access. The "m" in mtime means modify. What does the "c" in ctime mean?

Linux and Unix systems typically track 3 timestamps in file inodes: atime, ctime, and mtime. The "a" in atime means access. The "m" in mtime means modify. What does the "c" in ctime mean?

• copy-on-write
• create
• change
• cache 

 

EXPLANATION

"c" in ctime means change.  Specifically, a change to the inode's status, eg, permissions, ownership, link count, file size, etc.
http://man7.org/linux/man-pages/man7/inode.7.html
"Last status change timestamp (ctime) stat.st_ctime; statx.stx_ctime"

http://www.linux-mag.com/id/8658/
"Timestamps telling when the inode itself was last change (ctime, changing time), the file content was last modified (mtime or modification time), and when the file was last accessed (atime or access time)"

SOURCE

http://man7.org/linux/man-pages/man7/inode.7.html

Read More

What category cabling should be used in VOIP where throughput of greater than 100Mbps is desired?

What category cabling should be used in VOIP where throughput of greater than 100Mbps is desired?

• CAT-3
• CAT-6
• CAT-5
• CAT-5a 

EXPLANATION

CAT-6 cabling should be used where throughput of greater than 100Mbps is desired.

SOURCE

https://www.centurylink.com/business/help/voip/equipment/phone-and-computer-connection-diagrams.html

Read More

WIth Mobile Networks, what is an umbrella cell?

WIth Mobile Networks, what is an umbrella cell?

• A slang term used for a waterproof mobile phone with folding display.
• Large mobile phone network covering smaller cells.
• Coverage area of a transmitter in a television network
• A cell infected by a virus developed by an international conglomeration. 

 

EXPLANATION

There are five different cell sizes in a GSM (mobile telephone) network: macro, micro, pico, femto and umbrella cells.
Umbrella cells are used to cover shadowed regions of smaller cells and fill in gaps in coverage between those cells.

SOURCE

http://4g5gworld.com/wiki/global-system-mobile-communications-gsm

Read More