As usual today, I will write a post about internet connection, Internet Service Provider(ISP) and The Internet Address.
First of all, we will talk about the internet connection.
There are two types of internet connection.
- Dial -up connection
- Broadband Internet Connection
DIAL-UP CONNECTION
Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line. The user's computer or router uses an attached modem to encode and decode information into and from audio frequency signals, respectively.
In 1979, Tom Truscott and Steve Bellovin, graduate students for Duke University, created an early predecessor to dial-up Internet access called the USENET. The USENET was a UNIX based system that used a dial-up connection to transfer data through telephone modems. Dial-up Internet has been around since the 1980s via public providers such as NSFNET-linked universities and was first offered commercially in July 1992 by Sprint. Despite losing ground to broadband since the mid-2000s, dial-up may still be used where other forms are not available or the cost is too high, such as in some rural or remote areas
BROADBAND INTERNET CONNECTION
(always
on connections)
important to protect your computer from
hackers
BROADBAND VS. DIAL-UP
BROADBAND
|
DIAL-UP
|
||
AVAILIBILITY
|
roadband availability has
become more and more widespread over the last few years in particular.
satellite Internet is always an option for more rural areas that haven't been
expanded to yet.
|
Dial-up can be accessed
anywhere via a telephone line.
|
|
EQUIPMENT
|
ore than dialup connection, change based on different broadband
technology and speed
e.g Fiber Optic cable,
|
Less equipment compare to Broadband
|
|
SPEED
|
Faster, can go up to several megabytes per second
|
Slow, maximum speed is 56 kbps
|
|
INTERNET SERVICE PROVIDER
An Internet service provider (ISP) is an organization that provides services accessing and using the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.
Internet services typically provided by ISPs include Internet access, Internet transit, domain name registration, web hosting, Usenet service and colocation.
Responsible of ISP
EXAMPLES ISP IN MALAYSIA
THE INTERNET ADDRESS
IP Address
A number that uniquely identifies each computer or device connected to the Internet.
ØIP addresses are:
ØUnique
ØGlobal
and Standardised
ØEssential
Domain Name and IP Address
•People prefer to use
easy-to-remember names instead of IP addresses
•Domain names (a part of the URL) are alphanumeric
names for IP addresses.
• e.g., neon.ece.utoronto.ca, www.google.com, ietf.org
•The domain name system (DNS) is an Internet-wide distributed
database that
translates between domain names and IP addresses
translates between domain names and IP addresses
•How important is DNS?
Top-level domains (TLDs)
•The first-level set
of domain names are the top-level domains (TLDs).
•Three
types of top-level domains:
–Organizational:
3-character code indicates the function of the organization
•Used primarily within
the US
•Examples: gov,
mil, edu,
org, com, net
–Geographical: 2-character country or region code
•Examples: us, va,
jp,
de
•
–Reverse
domains:
A special domain (in-addr.arpa) used for IP address-to-name mapping
–
There are more than 200 top-level
domains.
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