FTP - Transfers files between systems, Authenticates, Full-featured functionality , SSH - Encrypted communication link, acts just like telnet, Telnet - Login to devices remotely, console access, in-the-clear text, SMTP - Server-to-server email transfer, send mail from a device to a mail server, DNS - converts names to IP addresses, DHCP - Automated configuration of IP address, subnet mask, and other options., HTTP - Communication in the browser, clear text, HTTPS - Communication in the browser, encrypted text, POP3 - Receive emails from an email server, Basic mail transfer , IMAP - Receive emails from an email server, includes email inbox management from multiple clients, SMB/CIFS - Used by MS, File sharing, printer sharing, SNMP - Gather statistics from network devices, SNMP v1 - Structured tables, in the clear, SNMP v2 - Data type enhancement, Bulk transfers, still in the clear, SNMP v3 - Message integrity, authentication, encryption, LDAP - Store and retrieve information in a network directory, RDP - Share a desktop from a remote location, SFTP - File transfers using SSH, NTP - synchronization of system clocks, Syslog - Standard for message logging, LDAPS - A non-standard implementation of LDAP over SSL, Microsoft SQL Server - Microsoft Structured Query Language), Oracle SQL *Net - remote data access protocol that enables client-server and server-server communications, MySQL - used to store data in tables that map to objects., SIP - Voice over IP (VoIP) signaling,

1.5 - Common Ports

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