42 - Internet and online security
internet as the connection speed is low and connection time is
typically charged per hour.
DSL (e.g. ADSL)
DSL (Digital Subscriber Line) is an ‘always-on’ connection that runs
over the phone line. As DSL and phone do not use the same
frequencies, you can use your telephone at the same time you are
connected to the internet (this requires a ‘micro-filter’ on each
telephone socket to avoid interference). To be eligible for DSL, you
must be located near an DSL-equipped phone exchange (service is
sometimes unavailable in rural areas). Connection speeds vary
depending on your location, but DSL generally provides very fast and
reliable internet connection. As the connection is always-on, it is
generally charged at fixed monthly rates.
Cable
A cable connection provides fast and always-on internet service via a
cable television line. This service is generally available in large cities.
You can use your telephone and watch cable TV at the same time you
are connected to the internet.
Network connections
A LAN (Local Area Network) is a group of computers (for example,
within an office building or home) that share a common
communications line and resources. When you set up a network, you
can share files, peripheral devices (such as a printer) and an internet
connection. You can set up a LAN using wired technologies (such as
Ethernet) or wireless technologies (such as Wi-Fi or Bluetooth).
Wireless networks
A wireless LAN or WLAN is a wireless local area network, which may
link two or more computers without using wires. Setting up a wireless
Note
A DSL connection requires an appropriate modem. A modem is usually
provided by the ISP when you register. Many of these modems include an
‘router’ that provides network and Wi-Fi access.
