i-NET+ BASICS

1. The Internet depends upon the TCP/IP protocol and its suite of features.
2. Every IP host must have a unique address—a 32-bit binary number. Every IP host must also have a subnet mask and a default gateway setting.
3. Internet Service Providers (ISPs) provide access to the Internet through Network Access Points (NAPs).
4. A Uniform Resource Locator (URL) is used to access resources on the Internet. The URL specifies the protocol used to access the re-source (such as http: for a Web page), the name of the server where the resource resides (such as www.domain.com), the port (such as :8080), and the path to the resource (such as /folder/file.htm).
5. Know the common TCP/IP ports:
o FTP—21
o Telnet—23
o SMTP—25
o HTTP (WWW)—80
o POP3—110
o NNTP—119
o LDAP—389
6. Caching allows RAM to be used instead of actual access to speed up operations. Caching can be done on the client or server. A client can also cache Web data, increasing the overall efficiency with which Web pages are retrieved later.
7. To require that a word appear in the results of a keyword search, use a plus sign before the keyword. To ensure that a word does not appear in the results, use a minus sign before the keyword.