Chapter 6 – The Internet

Internet Backbone
A network of high-capacity routers and fiber-optic communications links that provides the main routers for data traffic across he Internet
Network Service Providers (NSPs)
Ex. AT&T, British Telecom, Deutsche Telekom, Sprint, and Verizon
Internet Service Providers (ISPs)
A company that offer Internet access to individuals, businesses, and smaller ISPs
Modem
Contains circuitry that converts the data-carrying signals from your computer to signals that can travel over various communications channels
TCP/IP
The primary protocol suite responsible for message transmission on the Internet
Protocol Suite
A combination of protocols that work together
TCP (Transmission Control Protocol)
Breaks a message or file into packets
IP (Internet Protocol)
Responsible for addressing packets so that they can be routed to their destination
Static IP Address
Permanently assigned
Dynamic IP Address
Temporarily assigned
Always-On-Connection
Linked to your ISP and is online whenever your computer and modem are on, even if you are not actively accessing the Internet
Domain Name
Most Internet servers also have an easy-to-remember name, such as nike.com. A _________ is a key component of Web page addresses and e-mail addresses.
Top-Level Domain
A domain name ends with an extension that indicates its _________.
Domain Name System (DNS)
Every domain name corresponds to a unique IP address that has been entered into a huge database called the ________.
Domain Name Server
Any computer that hosts this database is referred to as a ____________.
ICANN (Internet Corporation for Assigned Names and Numbers)
An organization called ______ is recognized by the United States and other governments as the global organization that coordinates technical management of the Internet’s Domain Name System.
Upstream Speed
Rate of data that is uploaded from your computer to the Internet
Downstream Speed
Rate of data downloaded to your computer
Fixed Internet Access
Links your computer to an ISP from a stationary point, such as a wall socket or roofmounted antenna
Portable Internet Access
Allows you to easily move your access device, as in the case of vehicle-mounted satellite dishes that can be deployed when the vehicle is parked.
Mobile Internet Access
Allows you to use the Internet as you are on the go, such as using a cell phone to collect your e-mail while you are travelling by train
Wi-Fi Hotspot
An area in which the public can access a Wi-Fi network that offers Internet service
WAP (Wireless Application Protocol)
A communications protocol that provides Internet access from handheld devices, such as cell phones
Mobile Broadband
For the real Internet, cellular service providers offer data services, sometimes referred to as ___________.
Intrusion
Any access to data or programs by hackers, criminals, or other unauthorized persons.
Communications Port
The doorway that allows a computer to exchange data with other devices
Port Probe
The use of automated software to locate computers that have open ports and are vulnerable to unauthorized access
Firewall
Software or hardware designed to filter out suspicious packets attempting to enter or leave a computer
Routable IP address
One that can be accessed by packets on the Internet
Private IP address
A non-routable IP address that can be used within a LAN, but not for Internet data transport
Network Address Translation (NAT)
The process your router uses to keep track of packets and their corresponding private or public IP addesses
Virtual Private Network (VPN)
Sales representatives and telecommuters often access corporate networks from home or from a customer’s office by using a secured connection called a __________.