| distributed company and operates the company’s |
Ethernet | The most popular LAN communication technology. There are a variety of types of |
| Ethernet, including 10Mbps (traditional Ethernet), 100Mbps (Fast Ethernet), and |
| 1,000Mbps (Gigabit Ethernet). Most Ethernet networks use Category 5 cabling to carry |
| information, in the form of electrical signals, between devices. Ethernet is an |
| implementation of CSMA/CD that operates in a bus or star topology. |
F
Fast Ethernet | Fast Ethernet, also called |
| UTP, STP, or |
Firewall | Firewall is considered the first line of defense in protecting private information. For |
| better security, data can be encrypted. A system designed to prevent unauthorized |
| access to or from a private network. Firewalls are frequently used to prevent |
| unauthorized Internet users from accessing private networks connected to the Internet, |
| especially Intranets all messages entering or leaving the intranet pass through the |
| firewall, which examines each message and blocks those that do not meet the specified |
| security criteria. |
G
Gateway | A gateway links computers that use different data formats together. |
Group | Groups consist of several user machines that have similar characteristics such as being |
| in the same department. |
H
HEX | Short for hexadecimal refers to the |
| unique symbols: the numbers 0 to 9 and the letters A to F. For example, the decimal |
| number 15 is represented as F in the hexadecimal numbering system. The hexadecimal |
| system is useful because it can represent every byte (8 bits) as two consecutive |
| hexadecimal digits. It is easier for humans to read hexadecimal numbers than binary |
| numbers. |
I
Intranet | This is a private network, inside an organization or company that uses the same |
| software you will find on the public Internet. The only difference is that an Intranet is |
| used for internal usage only. |
Internet | The Internet is a globally linked system of computers that are logically connected based |
| on the Internet Protocol (IP). The Internet provides different ways to access private and |
| public information worldwide. |
Internet address | To participate in Internet communications and on Internet |
| node must have an Internet address that identifies it to the other nodes. All Internet |
| addresses are IP addresses |
IP | Internet Protocol is the standard that describes the layout of the basic unit of |
| information on the Internet (the packet) and also details the numerical addressing |
| format used to route the information. Your Internet service provider controls the IP |
| address of any device it connects to the Internet. The IP addresses in your network |
| must conform to IP addressing rules. In smaller LANs, most people will allow the DHCP |
| function of a router or gateway to assign the IP addresses on internal networks. |
IP address | IP address is a |
| information that is sent in packets across the Internet. For example 80.80.80.69 is an IP |
| address. When you “call” that number, using any connection methods, you get |
| connected to the computer that “owns” that IP address. |
ISP | ISP (Internet Service Provider) is a company that maintains a network that is linked to |
| the Internet by way of a dedicated communication line. An ISP offers the use of its |
| dedicated communication lines to companies or individuals who can’t afford the high |
| monthly cost for a direct connection. |
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