A hashtag is a number symbol (#) used to label
keywords in a tweet. The name "hashtag" was
coined by Twitter and combines the word "hash"
(another name for the number symbol) and "tag,"
since it is used to tag certain words. In order to tag
a keyword in a Twitter post, simply type a number
symbol (Shift+3) immediately before the word. For
example, you can tag the word "tech" in a tweet by
typing "#tech.“
Twitter automatically turns hashtagged words into links
to a dynamic feed. This feed is updated in real-time
and lists all recent tweets containing the same
hashtag. When you post a tweet with a hashtag,
your tweet will show up in the public feed. Besides
clicking on hashtags within tweets, you can also
search for hashtags using Twitter's search feature.
HASHTAG
For most of history, "tweet" has been the sound a bird makes. However, with the
advent of Twitter, the word "tweet" has taken on a whole new meaning.
A tweet is an online posting, or "micro-blog" created by a Twitter user. The purpose
of each tweet is to answer the question, "What are you doing?" However, tweets
can contain any information you want to post, such as your plans for the
weekend, your thoughts about a TV show, or even notes from a lecture. You can
publish a tweet using a computer or a mobile phone. Once published, the tweet
will appear on the Twitter home pages of all the users that are following you.
Likewise, your Twitter home page will display the most recent tweets of the users
that you are following.
TWEET
Stands for "HyperText Transfer Protocol."
This is the protocol used to transfer
data over the World Wide Web. That's
why all Web site addresses begin with
"http://". Whenever you type a URL into
your browser and hit Enter, your
computer sends an HTTP request to
the appropriate Web server. The Web
server, which is designed to handle
HTTP requests, then sends to you the
requested HTML page.
HTTP
A hyperlink is a word, or image that you can click on
to jump to a new document or a new section in
the document. Hyperlinks are found in nearly all
Web pages, allowing you to click your way from
page to page. Text hyperlinks are often blue and
underlined, but don't have to be. When you move
the cursor over a hyperlink, whether it is text or
an image, the arrow should change to a small
hand pointing at the link. When you click it, a new
page or place in the current page will open.
HYPERLINK OR LINK
Impressions track how many times a
webpage or element on a webpage is
viewed. It is one of the standard
metrics used in website analytics
software. The term "impressions" most
often refers to page impressions, which
is synonymous with page views. Each
time a page is viewed, a page
impression is counted. Therefore, a
single visitor can rack up multiple
impressions on a website by visiting
multiple pages.
IMPRESSION
Instagram is an online photo sharing
service. It allows you to apply different
types of photo filters to your pictures
with a single click, then share them
with others. While is a rather basic
service, Instagram's simplicity has
helped it gain widespread popularity.
INSTAGRAM
Lag is a slow response from a computer. It can be used
to describe any computer that is responding slower
than expected. However, the term is most commonly
used in online gaming.
Video game lag is generally caused by one of two factors
– 1) a slow computer or 2) a slow Internet connection.
If you are playing an online multiplayer game and your
computer cannot process the incoming data in realtime, it may slow the game down for everyone. If your
Internet connection is slow or inconsistent (which is
common with a shared wireless connection), your
system may not send and receive enough data to
keep up with other players. This lag may produce
choppy frame rates and cause a delay between your
input and what happens on the screen.
LAG
As the average computer screen size
has grown larger, the size of online
advertisements as grown as well.
The leaderboard ad has a standard
size of 728 pixels wide by 90 pixels
tall (728x90).
Leaderboards can contain text, images,
or even animations. When a visitor
clicks on a leaderboard, he or she is
directed to the advertiser's website.
LEADERBOARD
LinkedIn is a social networking website
designed for business professionals.
It allows you to share work-related
information with other users and keep
an online list of professional contacts.
Like Facebook and MySpace, LinkedIn
allows you to create a custom profile.
However, profiles created within
LinkedIn are business-oriented rather
than personal. For example, a
LinkedIn profile highlights education
and past work experience, which
makes it appear similar to a resume.
LINKEDIN
A meme is a concept or behavior that spreads from person to person.
Examples of memes include beliefs, fashions, stories, and phrases. In
previous generations, memes typically spread within local cultures or social
groups. However, now that the Internet has created a global community,
memes can span countries and cultures across the world. Memes that are
propagated online are called "Internet memes."
MEME
IPv4 is the most widely used version of the Internet
Protocol. It defines IP addresses in a 32-bit format,
which looks like 123.123.123.123. Each three-digit
section can include a number from 0 to 255, which
means the total number of IPv4 addresses available
is 4,294,967,296.
Each computer or device connected to the Internet
must have a unique IP address in order to
communicate with other systems on the Internet.
Because the number of systems connected to the
Internet is quickly approaching the number of
available IP addresses, IPv4 addresses are
predicted to run out soon because there are over 6
billion people in the world.
IPV4
IPv6, also called IPng (or IP Next Generation),
is the next planned version of the IP
address system. (IPv5 was an experimental
version used primarily for streaming data.)
While IPv4 uses 32-bit addresses, IPv6
uses 128-bit addresses, which increases
the number of possible addresses by an
exponential amount. For example, IPv4
allows 4,294,967,296 addresses to be
used. IPv6 allows for over
340,000,000,000,000,000,000,000,000,000
,000,000,000 IP addresses. That should be
enough to last awhile.
IPV6
Pinterest is a social networking website that allows you to
organize and share ideas with others. You can share your own
content as well as things that other Pinterest users have
posted.
PINTEREST
The Internet Engineering Task Force (IETF) develops and
promotes voluntary Internet standards, in particular the
standards that comprise the Internet protocol suite (TCP/IP). It
is an open standards organization, with no formal membership
or membership requirements. All participants and managers are
volunteers, though their work is usually funded by their
employers or sponsors.
INTERNET ENGINEERING
TASK FORCE
Stands for "Domain Name System." Domain names serve as
memorable names for websites and other services on the Internet.
However, computers access Internet devices by their IP addresses.
DNS translates domain names into IP addresses, allowing you to
access an Internet location by its domain name.
Thanks to DNS, you can visit a website by typing in the domain name
rather than the IP address. For example, to visit the Tech Terms
Computer Dictionary, you can simply type "techterms.com" in the
address bar of your web browser rather than the IP address
(67.43.14.98). It also simplifies email addresses, since DNS
translates the domain name (following the "@" symbol) to the
appropriate IP address.
To understand how DNS works, you can think of it like the contacts app
on your smartphone. When you call a friend, you simply select his or
her name from a list. The phone does not actually call the person by
name, it calls the person's phone number. DNS works the same way
by associating a unique IP address with each domain name.
DNS
Phishing is similar to fishing in a lake, but
instead of trying to capture fish, phishers
attempt to steal your personal information.
They send out e-mails that appear to come
from legitimate websites. The e-mails state
that your information needs to be updated
or validated and ask that you enter your
username and password, followed by even
more information, such as your full name,
address, phone number, social security #,
and credit card #.
Phishing is a con game that scammers use to
collect personal information from
unsuspecting users. The false e-mails often
look surprisingly legitimate, and even the
Web pages where you are asked to enter
your information may look real.
PHISHING
PHISHING
However, the URL in the address field can tell you if the page
you have been directed to is valid or not. For example, if you
are visiting an Web page on eBay, the last part of the domain
name should end with "ebay.com." Therefore,
"http://www.ebay.com" and "http://cgi3.ebay.com" are valid
Web addresses, but "http://www.ebay.validate-info.com"
and "http://ebay.login123.com" are false addresses, which
may be used by phishers. If URL contains an IP address, such
as 12.30.229.107, instead of a domain name, you can
almost be sure someone is trying to phish for your
personal information.
Pharming is yet another way hackers attempt to manipulate
users on the Internet. While phishing attempts to capture
personal information by getting users to visit a fake
website, pharming redirects users to false websites
without them even knowing it.
One way that pharming takes place is via an e-mail virus
that "poisons" a user's local DNS cache. It does this by
modifying the DNS entries, or host files. For example,
instead of having the IP address 17.254.3.183 direct to
www.apple.com, it may direct to another website
determined by the hacker. Pharmers can also poison
entire DNS servers, which means any user that uses the
affected DNS server will be redirected to the wrong
website. Fortunately, most DNS servers have security
features to protect them against such attacks.
PHARMING
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