Netbios netbios is the term used to describe the

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NetBIOS NetBIOS is the term used to describe the combination of two protocols: NetBEUI and NetBIOS. NetBIOS was used in early
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Windows networks. Because NetBIOS is a non-routable protocol, it was often combined with IP to enable internetwork communications. NetBIOS over TCP/IP, or NetBT, is used to allow older computers and applications that rely on NetBIOS to communicate on a TCP/IP network. Be aware of the following facts regarding protocol suite support and features: Virtually all operating systems today provide native (built-in) support for TCP/IP. Most older versions of some operating systems used a different protocol as the default protocol suite. For example, older NetWare servers used IPX/SPX, while older Mac OS systems used AppleTalk. Older operating systems without native TCP/IP support enabled IP communications by either installing the protocol stack or through a process known as encapsulation or tunneling . With this process, non-IP packets are re-packaged as IP packets at the sending device. The receiving device strips off the IP headers to reveal the original packets. The following table lists several protocols in the TCP/IP protocol suite: Protocol Default Port(s) Description Hypertext Transfer Protocol (HTTP) 80 HTTP is used by web browsers and web servers to exchange files (such as web pages) through the World Wide Web and intranets. HTTP can be described as an information requesting and responding protocol. It is typically used to request and send Web documents, but is also used as the protocol for communication between agents using different IP protocols. Hypertext Transfer Protocol over Secure Socket Layer or HTTP over SSL (HTTPS) 443 HTTPS is a secure form of HTTP that uses SSL as a sublayer for security. SSL secures messages being transmitted on the Internet. It uses RSA for authentication and encryption. Web browsers use SSL (Secure Sockets Layer) to ensure safe Web transactions. URLs that begin with https:// trigger your Web browser to use SSL. File Transfer Protocol (FTP) 21 FTP provides a generic method of transferring files. It can include file security through usernames and passwords, and it allows file transfer between dissimilar computer systems. FTP can transfer both binary and text files, including HTML, to another host. FTP URLs are preceded by ftp:// followed by the DNS name of the FTP server. To log into an FTP server, use: ftp://[email protected] . Simple Mail Transfer Protocol (SMTP) 25 SMTP is used to route electronic mail through the internetwork. Email applications provide the interface to communicate with SMTP or mail servers. Internet Message Access Protocol (IMAP) 143 IMAP is an email retrieval protocol designed to enable users to access their email from various locations without the need to transfer messages or files back and forth between computers. Messages remain on the remote mail server and are not automatically downloaded to a client system.
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