Author Topic: Computer studies help HERE only !!  (Read 34533 times)

Offline ~Mimi~

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Re: Computer studies help HERE only !!
« Reply #90 on: May 25, 2009, 02:30:00 am »
A firewall is a device, or a piece of software that is placed between your computer and the rest of the network (where the hackers are!)
If you wish to protect your whole LAN from hackers out on the Internet, you would place a firewall between the LAN and the Internet connection.
A firewall blocks unauthorised connections being made to your computer or LAN. Normal data is allowed through the firewall (e.g. e-mails or web pages) but all other data is blocked.
In addition to physical devices, firewalls can also be software. In fact most computer operating systems have a software firewall built in (e.g. Windows, Linux and Mac OS)

Obtained from www.igcseict.com

sarsam: That is correct.Mainly in our syllabus. We use it as one of the answers fr preventing hacking...

Offline ~Mimi~

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Re: Computer studies help HERE only !!
« Reply #91 on: May 25, 2009, 04:19:49 am »
Salaam! Can sum1 please help me with this?

-What's parameter passing?
-How are expert systems used in "car diagnostics"?
-How are expert systems used in the  constructions industry for quantity/surveyor costings??!?!
-It says in the mark schemes that Wireless LAN has a slower speed than Net Access. I'm not so sure how these two are actually different?
-Wired Internet connections are faster than Wireless? ( Mark scheme)
- Information/ Multimedia kiosks in airports, etc.... What exactly are they?! Not so clear on the concept.

Thank u in advance!
« Last Edit: May 25, 2009, 06:37:40 am by ~~Muslimah93~~ »

Offline cactus_360

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Re: Computer studies help HERE only !!
« Reply #92 on: May 25, 2009, 08:05:22 am »
ADI....OR ANYONE
CAN U DO DA ALGO FOR J 2003 AND JUNE 2002????

THANX
Newtons (pimped) Law: Every BOOK continues to be in a state of rest or uniform motion UNLESS and UNTIL  an External or Internal exams COME!!!!!!!!!!!!

Offline astarmathsandchemistry

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Re: Computer studies help HERE only !!
« Reply #93 on: May 25, 2009, 08:31:59 am »
ADI....OR ANYONE
CAN U DO DA ALGO FOR J 2003 AND JUNE 2002????

THANX
sure, answer in next reply :D
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Offline Ghost Of Highbury

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Re: Computer studies help HERE only !!
« Reply #94 on: May 25, 2009, 08:37:54 am »
i'm too confused abt these ones..
rekemeko plzz help! ???
divine intervention!

Offline astarmathsandchemistry

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Re: Computer studies help HERE only !!
« Reply #95 on: May 25, 2009, 08:38:49 am »
i'm too confused abt these ones..
rekemeko plzz help! ???
yeah they are kinda stupid but they dont come anymore in new years
i am still solving them............... :o
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Offline ~M.J~

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Re: Computer studies help HERE only !!
« Reply #96 on: May 25, 2009, 09:14:01 am »
Obviously wired internet connections r faster than wireless connections
CUZ in wired ones direct a cable is used no data losses, no hindrances

Offline astarmathsandchemistry

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Re: Computer studies help HERE only !!
« Reply #97 on: May 25, 2009, 09:30:49 am »
ADI....OR ANYONE
CAN U DO DA ALGO FOR J 2003 AND JUNE 2002????

THANX
ok here are your answers, they are sooo tough!.......


JUNE 2002

set Number of sales=0
set Number of refunds=0
set total amount of money in till=0
Input money value
IF money value is sale THEN
      Number of sales= Number of sales+1
      Total amount in till=Total amount in till+money value
else IF (you can use this else if without putting an end if for it)
      money value is refund THEN
         Number of refunds=Number of refunds+1
         Total amount in till=Total amount in till-Money value
End IF
Output number of sales, number of refunds and money in till

JUNE 2003

Set Counter, Logged on, and Logged off=0
Set Start time, End time, and Used time=0
While counter is < 30   DO
      IF student is logged on THEN
         Logged on=Logged on+1
         Record Start Time
      Else IF
         Student is Logged off THEN
            Logged off=Logged off+1
            Record End Time
     END IF
     Time Used= Time Used+(End Time-Start Time)
     Counter=Counter+1
END WHILE
Output Time Used Divided by 30 (number of students)


I HOPE I HELPED AND THANKS :D
         
     
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Offline cactus_360

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Re: Computer studies help HERE only !!
« Reply #98 on: May 25, 2009, 09:38:18 am »
THANX  WAT ABT J 2003
?????


WHICH SCHOOL IN RIYADH?
Newtons (pimped) Law: Every BOOK continues to be in a state of rest or uniform motion UNLESS and UNTIL  an External or Internal exams COME!!!!!!!!!!!!

Offline astarmathsandchemistry

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Re: Computer studies help HERE only !!
« Reply #99 on: May 25, 2009, 09:40:18 am »
THANX  WAT ABT J 2003
?????


WHICH SCHOOL IN RIYADH?

DUDE JUNE 2003 IS BELOW JUNE 2002 I DID BOTH IN THE SAME REPLY :D
i am in manarat al riyadh you?
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Offline cactus_360

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Re: Computer studies help HERE only !!
« Reply #100 on: May 25, 2009, 09:44:19 am »
oh yeah!!!11 my bad.............

i didnt see that.....ur school is cool!!!!! u guyz even hav a horse do u have horse riding competitions tooo
Newtons (pimped) Law: Every BOOK continues to be in a state of rest or uniform motion UNLESS and UNTIL  an External or Internal exams COME!!!!!!!!!!!!

Offline astarmathsandchemistry

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Re: Computer studies help HERE only !!
« Reply #101 on: May 25, 2009, 09:47:11 am »
oh yeah!!!11 my bad.............

i didnt see that.....ur school is cool!!!!! u guyz even hav a horse do u have horse riding competitions tooo
no +rep for me?? :P
yeah man but sometimes they are stuuuupidd the school, yeah we got horses man :D but nah dont use them alot
what about you what school are you in?
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Offline cactus_360

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Re: Computer studies help HERE only !!
« Reply #102 on: May 25, 2009, 09:49:14 am »
ooops!!!!!! sorrry   there u go +rep 2 times ;) ;)
Newtons (pimped) Law: Every BOOK continues to be in a state of rest or uniform motion UNLESS and UNTIL  an External or Internal exams COME!!!!!!!!!!!!

Offline cactus_360

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Re: Computer studies help HERE only !!
« Reply #103 on: May 25, 2009, 09:50:09 am »
i cant rep 2times wat da hell??
Newtons (pimped) Law: Every BOOK continues to be in a state of rest or uniform motion UNLESS and UNTIL  an External or Internal exams COME!!!!!!!!!!!!

Offline cactus_360

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Re: Computer studies help HERE only !!
« Reply #104 on: May 25, 2009, 09:51:37 am »
i am in middle east international school totally sucks!!!!!!!

u must be havin computer notes by mr.mansoor??? ;) :D :)
Newtons (pimped) Law: Every BOOK continues to be in a state of rest or uniform motion UNLESS and UNTIL  an External or Internal exams COME!!!!!!!!!!!!