Glossary of Technical Terms
2G is the second generation of telecommunication technology for mobile networking.
3G is the third generation of telecommunication technology for mobile networking.
4G is the fourth generation of telecommunication technology for mobile networking.
403 ( 403 Forbidden ) is the standard HTTP error code that occurs when a server will not allow a
Web browser to access the fi le being requested.
404 ( 404 Not Found ) is the standard HTTP error code that occurs when a server cannot fi nd the
fi le being requested.
ADSL ( asymmetric digital subscriber line ) is a technology that allows data to be sent over existing
copper telephone lines.
Bandwidth is the amount of data that can fl ow in a given time.
Block page is the page delivered to the user when a request for a Web site is fi ltered, or blocked.
Block pages take many forms and may be disguised as benign error pages or may bear the ISP ’ s
logo and further explanation of the block.
CCTV ( closed circuit television ) is the use of video cameras to transmit video from a specifi c place
to a limited set of monitors. Signals for CCTV are not openly transmitted.
Circumvention refers to the general concept of using proxies and other tools to bypass Internet
fi ltering.
DDoS attack ( distributed denial of service attack ) is an attempt to prevent users from accessing a
specifi c computer resource, such as a Web site. DDoS attacks (sometimes called DoS, or denial of
service, attacks) usually involve overwhelming the targeted computer with requests so that it is
no longer able to communicate with its intended users.
Deep packet inspection is a form of computer network packet fi ltering that examines the data
part (and possibly also the header) of a packet as it passes an inspection point, searching for
protocol noncompliance, viruses, spam, intrusions, or predefi ned criteria to decide if the packet
can pass or if it needs to be routed to a different destination, or for the purpose of collecting
statistical information.
2G is the second generation of telecommunication technology for mobile networking.
3G is the third generation of telecommunication technology for mobile networking.
4G is the fourth generation of telecommunication technology for mobile networking.
403 ( 403 Forbidden ) is the standard HTTP error code that occurs when a server will not allow a
Web browser to access the fi le being requested.
404 ( 404 Not Found ) is the standard HTTP error code that occurs when a server cannot fi nd the
fi le being requested.
ADSL ( asymmetric digital subscriber line ) is a technology that allows data to be sent over existing
copper telephone lines.
Bandwidth is the amount of data that can fl ow in a given time.
Block page is the page delivered to the user when a request for a Web site is fi ltered, or blocked.
Block pages take many forms and may be disguised as benign error pages or may bear the ISP ’ s
logo and further explanation of the block.
CCTV ( closed circuit television ) is the use of video cameras to transmit video from a specifi c place
to a limited set of monitors. Signals for CCTV are not openly transmitted.
Circumvention refers to the general concept of using proxies and other tools to bypass Internet
fi ltering.
DDoS attack ( distributed denial of service attack ) is an attempt to prevent users from accessing a
specifi c computer resource, such as a Web site. DDoS attacks (sometimes called DoS, or denial of
service, attacks) usually involve overwhelming the targeted computer with requests so that it is
no longer able to communicate with its intended users.
Deep packet inspection is a form of computer network packet fi ltering that examines the data
part (and possibly also the header) of a packet as it passes an inspection point, searching for
protocol noncompliance, viruses, spam, intrusions, or predefi ned criteria to decide if the packet
can pass or if it needs to be routed to a different destination, or for the purpose of collecting
statistical information.