4, 5 , 6 , and plus key
456+
Answer:
HTTP
Explanation:
HTTP is Hyper Text Transfer Protocol. This protocol is used to provide connection between server and client that are not connected or ill-matched. When a client request to the website. this address facilitate the client to connect with the server that is not directly connected to the client computer.
As we know, every website address starts with http/:
Answer:
The answer to this question is given below in this explanation section.
Explanation:
"difference between cd-r, cd-rw and cd-rom"
CDs are also known as WORM discs,for "write once Read many".A re writable version based on excitable crystals and known as CD-RW was introduced in the mid 1990s because both CD-R and CD-RW recorders originally required a computer to operate they had limited acceptance of use as computer software.
A compact Disc Read only memory (CD-ROM) is a read only disc.A compact disc Re-writable (CD-RW) is an erasable disc that can be reused.The data on a CD-RW disc can be erased and recorded over numerous times.CD-RW may not be readable outside of the drive it was created in.
cd-r :
CD-R is a digital optical disc storage format.A CD-R disc is compact disc that can be written once and read arbitrarily many times.
CD-R stand for" compact disc" Record-able .CD-R disc are blank CDs that can record data written by a CD burner.The word "record-able" is used because CD-R are often used to record audio,Which can be play back by most CD players.
cd-rw:
CD-RW compact disc re-writable is a digital optical disc,storage format introduced in 1997.A CD-RW compact disc can be written read erased and re-written.
in this case of CD-RW the writing laser makes permanent marks in a layers of dye polymer in the disc.CD rewrite-able discs in a similar fashion,except that the change to the recording surface is revers able.
cd-rom:
CD-Rom observation of compact disc read only memory type of computer memory in the form of compact disc that is read by optical means.A CD-ROM drive uses a low power laser been encoded in the form of tiny pits on a optical disk.The "ROM" part of the term means the data on the disc "read only memory" or cannot be altered or erased.
Answer:
MODEM(Modulator Demodulator)
Explanation:
A modem is a device used in data communication that allows analog signal to be sent over a telephone line.
The modem works by converting the analog signal into digital data that the computer understands. The digital data is converted back to its original form at the receiver end.
Modem modulates analog signal from a telephone line to digital data the computer can understand. also, at the receiver end, it demodulates the digital data back to its original analog signal.
