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 |
| consists of 16 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 |
|
IEEE | Institute of Electrical and Electronic Engineers. |
Intranet | This is a private network, inside an organization or company, that |
| uses the same software you will find on the public Internet. The |
| 108 |
| 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 | To participate in Internet communications and on 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 |
| or receiver of information that is sent in packets across the |
| Internet. For example 80.80.80.69 is an IP address, it is the closet |
| thing the Internet has to telephone numbers. When you “call” that |
| number, using any connection methods, you get connected to the |
| computer that “owns” that IP address. |
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. |
J
109