Lex 3-2 of 2
10Things I Didn’t Know About Domain Names (addon, parked and sub domains-aliased
and what is redirected).
A domain name is the name you pay for and reserve to give your particular website a
unique identity.
Domain name system (DNS) is the protocol that translates a fully qualified domain name
into a numeric internet protocol (IP) address needed to route information across the
Internet.
FQDN stands for fully qualified domain name.that has the format hostname.registered-
domain-name.top-level-domain.
Top level domains have suffixes also known as extensions. These give a clue as to what
type of organization the website represents.
DNS servers are fundamental to the Internet. They organize and find everything on the
WWW.
The United States top-level domains (TLD) include, among others, gov for government,
edu for education & mil for military.
Other nations have country codes, such as .fr for France, de for Germany etc.
The Internet Corporation for Assigned Names and Numbers (ICANN) is in charge of the
coordination of domain names.
Subdomain is a division in the DNS.
Many websites have links that when selected redirect the client to additional information
relevant to the website.
Tuesday, December 8, 2009
Lex 3-1 of 2
10 Things I Didn’t Know About SpyWare, Adware. Malware, Phishing, viruses and Trojan
Horses.
SpyWare is a type of computer program that secretly collects information & can transmit
it without my knowledge.
SpyWare can also use secretly collected info from my computer to display ads or take
other action in my browser or popup windows.
Adware is a form of computer program that displays commercial advertising in part of an application window in my computer. Because it is a program running on my computer it
has the ability to collect information about my use of the software.
Malware is the generic term for software born of ill intent. Besides invading my privacy, it can also take over my computer.
Phishing is a scam disguised as an email from a legitimate business offering you a job or
a financial jackpot. It is, a lure to get you to click onto a web site and divulge your
personal information.
A current example of phishing would be the emails, supposedly from Google, offering
high paying online jobs that require no experience.
A virus is a malicious or unwanted code that installs itself into my computer without
my knowledge.
While it is not possible for my computer to catch a virus from an email, an attachment to
an email can give a virus if it is opened.
Before opening any email attachment make sure it is from someone you trust and that the
person actually sent the email with an attachment.
A Trojan Horse is a malicious application that masquerades as a desired object that you
download knowingly to your computer.
10 Things I Didn’t Know About SpyWare, Adware. Malware, Phishing, viruses and Trojan
Horses.
SpyWare is a type of computer program that secretly collects information & can transmit
it without my knowledge.
SpyWare can also use secretly collected info from my computer to display ads or take
other action in my browser or popup windows.
Adware is a form of computer program that displays commercial advertising in part of an application window in my computer. Because it is a program running on my computer it
has the ability to collect information about my use of the software.
Malware is the generic term for software born of ill intent. Besides invading my privacy, it can also take over my computer.
Phishing is a scam disguised as an email from a legitimate business offering you a job or
a financial jackpot. It is, a lure to get you to click onto a web site and divulge your
personal information.
A current example of phishing would be the emails, supposedly from Google, offering
high paying online jobs that require no experience.
A virus is a malicious or unwanted code that installs itself into my computer without
my knowledge.
While it is not possible for my computer to catch a virus from an email, an attachment to
an email can give a virus if it is opened.
Before opening any email attachment make sure it is from someone you trust and that the
person actually sent the email with an attachment.
A Trojan Horse is a malicious application that masquerades as a desired object that you
download knowingly to your computer.
Monday, December 7, 2009
Sailing on a Big Net
Twenty-one fourth graders gingerly crawled onto the big net stretched between the twin hulls of a huge catamaran boat. Captain Tim started the engine. As the boat left the harbor, the excited children squealed and shouted while scrambling on their tummies to the front of the net. A sassy wind tingled their eager faces.
“Look! Dolphins!” someone shouted as nearby, three playful mammals poked their tails above Monterey Bay’s choppy water.
“Hey! Look down here!” The boys and girls stared down through the net’s super strong straps in amazement at the swirling water carrying the boat out into the ocean.
“Yeeesh!” screeched Samantha.
“That’s awesome,” whispered Oscar.
Twenty-one fourth graders gingerly crawled onto the big net stretched between the twin hulls of a huge catamaran boat. Captain Tim started the engine. As the boat left the harbor, the excited children squealed and shouted while scrambling on their tummies to the front of the net. A sassy wind tingled their eager faces.
“Look! Dolphins!” someone shouted as nearby, three playful mammals poked their tails above Monterey Bay’s choppy water.
“Hey! Look down here!” The boys and girls stared down through the net’s super strong straps in amazement at the swirling water carrying the boat out into the ocean.
“Yeeesh!” screeched Samantha.
“That’s awesome,” whispered Oscar.
Tuesday, December 1, 2009
Lex 2-2 of 2
Lex 2-2 of 2
10 Things I Didn’t Know About how many servers are part of the Internet and the levels of servers in the hierarchy of Internet servers.
Understanding computer language definitions is the first step for me.
A client is the person using a computer for information or recreation.
A computer is like a vehicle, a bus, train, or plane, providing a service by transporting persons to another place.
Servers are the information or recreation sought by the client.
The Internet is a transporter, an “Information Superhighway”, ‘A network of networks’.
Seeing the schematic of the internet network-the bits & pieces connecting-helps me to cope with a frozen computer screen when it doesn’t do what I want!
The variety of different services in the hierarchy of the Internet servers surprised me. I didn’t know there were so many choices.
Hofstetter’s ‘Jargon on the Net’ is like learning another language.
Hofstetter also wrote about online classes in chapter two. I’ve taken more than one at Cabrillo College. While, I was sometimes stymied by the Blackboard system, overall the classes were useful.
My computer experiences have been mostly with email & search tools. So far, this class has opened up several new computer possibilities for me to try out. The textbook & your sessions, which I have been downloading, will prove very helpful. Thanks!
10 Things I Didn’t Know About how many servers are part of the Internet and the levels of servers in the hierarchy of Internet servers.
Understanding computer language definitions is the first step for me.
A client is the person using a computer for information or recreation.
A computer is like a vehicle, a bus, train, or plane, providing a service by transporting persons to another place.
Servers are the information or recreation sought by the client.
The Internet is a transporter, an “Information Superhighway”, ‘A network of networks’.
Seeing the schematic of the internet network-the bits & pieces connecting-helps me to cope with a frozen computer screen when it doesn’t do what I want!
The variety of different services in the hierarchy of the Internet servers surprised me. I didn’t know there were so many choices.
Hofstetter’s ‘Jargon on the Net’ is like learning another language.
Hofstetter also wrote about online classes in chapter two. I’ve taken more than one at Cabrillo College. While, I was sometimes stymied by the Blackboard system, overall the classes were useful.
My computer experiences have been mostly with email & search tools. So far, this class has opened up several new computer possibilities for me to try out. The textbook & your sessions, which I have been downloading, will prove very helpful. Thanks!
Lex 2-1 of 2
Lex 2-1 of 2
10 Things I Didn’t Know About Tim Berners-Lee and his history regarding the WWW.
For a start, in my ignorance, I must admit that I had never heard of him until this class.
According to Hofstetter, in 1989 Berners-Lee developed HTML for the World Wide Web.
I now know HTML means hypertext markup language, a standard format used for hypertext documents on the Web.
I now know hypertext means certain words in a document can be linked into additional information related to the word.
I also have a better understanding of the World Wide Web as a network hypertext system allowing users access to billions of web pages & other type files.
According to the New York Times Guide to Essential Knowledge, published in 2004 (p. 654), the World Wide Web was invented by Berners-Lee in 1989 at Switzerland’s CERN Particle Physics Library.
Berners-Lee began working in computer science in the 1970’s (NYT, p. 966).
He also wrote programs for the first web server & web browser (NYT, p.966).
I understand that a web server is a stand-alone computer-like my home computer-and can receive input from various browsers.
Web browsers are software that enables my computer to download different programs.
10 Things I Didn’t Know About Tim Berners-Lee and his history regarding the WWW.
For a start, in my ignorance, I must admit that I had never heard of him until this class.
According to Hofstetter, in 1989 Berners-Lee developed HTML for the World Wide Web.
I now know HTML means hypertext markup language, a standard format used for hypertext documents on the Web.
I now know hypertext means certain words in a document can be linked into additional information related to the word.
I also have a better understanding of the World Wide Web as a network hypertext system allowing users access to billions of web pages & other type files.
According to the New York Times Guide to Essential Knowledge, published in 2004 (p. 654), the World Wide Web was invented by Berners-Lee in 1989 at Switzerland’s CERN Particle Physics Library.
Berners-Lee began working in computer science in the 1970’s (NYT, p. 966).
He also wrote programs for the first web server & web browser (NYT, p.966).
I understand that a web server is a stand-alone computer-like my home computer-and can receive input from various browsers.
Web browsers are software that enables my computer to download different programs.
Tuesday, November 24, 2009
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