Comput obj
1.A
2.A
10.B
11.A
12.B
13.C
18.B
19.C
20.D
27.C
28.B
29.C
42.B
43.B
44.B
45.B
46.A
======THEORY SECTION====== 2ai ) A computer virus is a malware that , when executed, replicates by inserting copies of itself (possibly modified) into other computer programs , data files, or the boot sector of the hard drive; when this replication succeeds , the affected areas are then said to be " infected " . 2aii ) i ) Resident Viruses ii )Multipartite Viruses iii )Direct Action Viruses 2b) i ) Vulnerabilities and attacks- s a system susceptibility or flaw , and many vulnerabilities are documented in the Common Vulnerabilities and Exposures ( CVE ) database and vulnerability management is the cyclical practice of identifying , classifying , remediating , and mitigating vulnerabilities as they are discovered . ii )Backdoors - in a computer system , a cryptosystem or an algorithm, is any secret method of bypassing normal authentication or security controls . iii )Denial -of- service attack- are designed to make a machine or network resource unavailable to its intended users. Attackers can deny service to individual victims , such as by deliberately entering a wrong password enough consecutive times to cause the victim account to be locked, or they may overload the capabilities of a machine or network and block all users at once . iv )Eavesdropping- is the act of surreptitiously listening to a private conversation, typically between hosts on a network . For instance, programs such as Carnivore and NarusInsight have been used by the FBI and NSA to eavesdrop on the systems of internet service providers . v )Privilege escalation- describes a situation where an attacker with some level of restricted access is able to , without authorization , elevate their privileges or access level. . 1ai ) Networking cables are networking hardware used to connect one network device to other network devices or to connect two or more computers to share printer, scanner etc . 1aii ) i ) Coaxial cable ii )Optical fiber cable iii )Patch cable 1b) Very Small Aperture Terminal 1ci) Difference Between Email address And Web Address. The simplest way to tell the difference is an email address always contains the ‘at sign’ (@), and a website address never does. Also, An e- mail address is a web service used to send and receive messages and web address is collection of static and dynamic web pages to perform several tasks like shopping, searching information, other govt. work purpose. 1cii) 1cii) Types Of email i)Djbadoo@ymail.com ii)Yungnath@gmail.com Types Of Website i)www.jamb.org.ng ii)www.waecdirect.org
4b) Write ONE out of the Two Here…
-Flash memory : An electronic non-volatile
computer storage device that can be
electrically erased and reprogrammed, and
works without any moving parts. Examples of
this are flash drives , memory cards and solid
state drives. A version of this is implemented
in many Apple notebooks.
Optical disc : A storage medium from which
data is read and written by lasers. Optical
disks can store much more data — up to 6
gigabytes more than most portable magnetic
media, such as floppies . There are three basic
types of optical disks: CD-ROM (read-only),
WORM (write-once read-many) & EO
(erasable optical disks).
-Magnetic Disk : A magnetic disk is a circular
plate constructed of metal or plastic coated
with magnetized material. Both sides of the
disk are used and several disks may be
stacked on one spindle with read/write heads
available on each surface. Bits are stored on
the magnetized surface in spots along
concentric circles called tracks. Tracks are
commonly divided into sections called
sectors. Disk that are permanently attached
and cannot be removed by the occasional
user are called hard disks. A disk drive with
removable disks is called a floppy disk drive.
4ci) Write 2 Out of this
Optical Drives
Optical drives include CD-ROM drives, CD-RW
drives (“burners”), DVD-ROM drives, DVD+/-RW
drives, and Blu-Ray (BD-ROM) drives. They use
lasers to read and/or write data. Some optical
drives combine various features; for example,
there are drives that will read DVD’s as well as
write CD-R’s or CD-RW’s.
Unless you are planning on doing a network
install, you will need at least one optical drive to
install the operating system and other software
on your new computer. Most optical drives
available nowadays have a SATA interface. If
you need an EIDE (PATA) drive, you may have a
hard time finding one.
On a personal note, I’ve found optical drives in
general to be the least reliable of all computer
hardware. They frequently break down and
require replacement, even if they’re rarely used.
I’ve also found there to be little difference
between optical drives made by different
manufacturers. My advice: Choose an OEM drive
by a company you’ve heard of, but don’t waste
your money on a top-of-the-line drive unless it
comes with a super warranty — and then register
the warranty and save the information. Chances
are that you’re going to need it.
Floppy Drives-:
The venerable floppy drive has seen better days.
Most new computers don’t even come with
floppy drives any more. But I still like in
Invite your friends……
Answers loading.... .
.
.
. LIKE OUR PAGE TO GET ANSWERS FASTER
No comments:
Post a Comment
drop your comments