Phishing scam

domains on URL (web addresses)

Anti-Phishing Phil

http://123.45.24.1/www.chase.com

understandingpersonalcomputers.blogpsot.com

whitehouse.gov
whitehouse.com
whitehouse.net

TLA -- three letter acronym

IP address

cmd
DNS

HTTP request
HTTP response
cache
HTML - hypertext markup language

we get our own website
cs12.cs.qc.cuny.edu/~wajo6789

login: wajo6789
password: 123456789

first two letters of last name
first two letters of first name
last 4 digits of social

Joshua Waxman
123456789

WINSCP download


hostname: cs12.cs.qc.cuny.edu

public_html

it will work
or it will say website or file or folder does not exist
or it will say that you do not have permission

hello.html

cs12.cs.qc.cuny.edu/~wajo6789/hello.html

w3schools.com

starts with  this text is bold
This is a hyperlink
with an attribute


we are doing ch 3 hands on 3

plan: ch 4, ho 1,
i will quickly demonstrate ho 2
ho 3
skip ho 4
i will walk you thru mail merge
then, we will be finished with Microsoft word, and will start on Excel

goal for today

Ch 2 hands on exercise 2 - 4
Ch 3 hands on exercise 1

homework: Ch 3 hands on exercise 2
also, Ch 2, practice exercise 1-4

notes 3

understandingpcs.blogspot.com


0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9

bit = binary digit
byte = 8 bits
nibble = 4 bits
word = 16 bits
dword = 32 bits

00
01
10
11 = total of 4 possible values

000
001
010
011
100
101
110
111 = total of 8 possible values

socks: red, green, blue
shoes: white, black

H
T

HHH
HHT
HTH
HTT
THH
THT
TTH
TTT

1 bit: 2^1 = 2
2 bits: 2^2 = 4
3 bits: 2*2*2 = 2^3 = 8
4 bits: 2^4 = 16
5 bits: 32
8 bits: 2^8 = 256
16 bits: 2^16 = 65,536
24 bits: 16.7 million

1024 = 2^10 bytes: kilobyte
1024x1024 bytes; 2^20: megabyte
2^30 = approx 1 billion: gigabyte
2^40: approx a trillion: terabyte

hertz
gigahertz

pixel = picture element
resolution
how many bits per pixel

24 bit color
900,054 bytes
24 bit bitmap
500 across
600 down
500 x 600 x 3 bytes

256 color
301,078 bytes

16 color
151,318 bytes

monochrome
38,462 bytes

HW from last time:
ch 1, practice exercise 1-4

class 2 notes

DropBox

show file extensions
.DOCX
.DOC

Syllabus:
Word, Excel, Access, ? Powerpoint
Computer concepts
HTML and web pages
DOS -- command line interface

3 hands-on tests
word, excel, access
20%, 20%, 25%

web page - 10%
hw - 15%
quizzes on computer concepts - 10%

book: grauer book(s)

w3schools.com
we learnt some basic html, up to but
not including HTML elements

von Neumann architecture
wikipedia

hardware
General purpose computer
software
bus
instruction set

RAM
x: 3 y: 4 z: 7

1. Say "please enter the first #"
2. get first number, store it in x
3. Say "please enter the second #"
4. get second number, store it in y
5. add x and y, store it in z
6. say x "and" y "=" z
7. Go to step 1


IP: 1
fetch-execute cycle

computer understands machine language
binary
01010111101