IT Professional Curricula     Tech & Dev Essentials     CompTIA     CompTIA Network+ N10-008

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In terms of computer networks, protocols are used to provide a required set of rules that enable computers to exchange information. Well-known Internet protocols include Transmission Control Protocol/Internet Protocol, User Datagram Protocol/Internet Protocol, File Transfer Protocol, and Hypertext Transfer Protocol. Ports, by comparison, are used to identify a type of network or specific process. Port numbers, ranging from 0 to 65535, are typically divided into three categories - well-known ports, dynamic ports, and registered ports.
In this course, you’ll learn about the most commonly-known ports in use on a computer network today. These include File Transfer Protocol, Simple Mail Transfer Protocol, Domain Name System, and Hypertext Transfer Protocol. You'll examine how HTTP uses the reserved port 80 and enables computers to send and receive Web client-based communication and messages from a Web server, including web site pages and data. Next, you'll explore other key ports including, port 25, reserved for Simple Mail Transfer Protocol and how SMTP allows e-mail clients and services to send out e-mails. You'll learn how port 100, reserved for Post Office Protocol v3 and port 143, reserved for Internet Message Access Protocol, allow for e-mail clients to retrieve e-mail messages from a mail server over a TCP/IP connection. Lastly, you'll learn about Secure Sockets Layer and how it can be incorporated into POP3 and IMAP implementations to enable more secure encrypted e-mail communications.

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Objectives

CompTIA Network+ N10-008: Well-known Ports & Protocols discover the key concepts covered in this course outline the features of the File Transfer Protocol (FTP) describe when to use the Secure Shell (SSH) protocol outline the purpose and characteristics of the Secure File Transfer Protocol (SFTP) outline the purpose and characteristics of telnet describe how the Simple Mail Transfer Protocol (SMTP) is used for e-mail communications outline the common uses for the Domain Name System (DNS) recognize the benefits of using Dynamic Host Configuration Protocol (DHCP) on a network outline the key considerations when using the Trivial File Transfer Protocol (TFTP) recognize the common uses of the Hypertext Transfer Protocol (HTTP) outline the ways in which the Post Office Protocol v3 (POP3) is used for e-mail communication describe the Network Time Protocol (NTP) outline the purpose of the Internet Message Access Protocol (IMAP) recognize how the Simple Network Management Protocol (SNMP) is used in the administration of networks outline the purpose and characteristics of the Lightweight Directory Access Protocol (LDAP) outline the features of the Hypertext Transfer Protocol Secure (HTTPS) describe the purpose and characteristics of the Server Message Block (SMB) describe how syslog is the standard for message logging outline the benefits of using SMTP TLS describe the benefits of using Secure Lightweight Directory Access Protocol (LDAPS) recognize the benefits of using IMAP over SSL for secure e-mail communications outline how POP3 over SSL can be used to secure e-mail communications summarize the key concepts covered in this course