20, FTP File Transfer Protocol DATA, 21, FTP File Transfer Protocol CONTROL, 22, SSH Secure Shell (Encrypted!) SFTP is a SSH extension for FTP, 23, Telnet Virtual Terminal Connection- not secure, 53, DNS Domain Name System Translates IPs/Names, 67, DHCP Dynamic Host Config Protocol Server, 68, DHCP Dynamic Host Config Protocol Client, 69, TFTP Trivial FTP- used for Uploading BIOS etc. No authentication., 80, HTTP, 443, HTTPS, 110, POP3 for inbound emails, 995, POP3 Over SSL for inbound emails, 143, IMAP for sync'd inbound emails., 993, IMAP Over SSL for sync'd inbound emails., 25, SMTP Simple Mail Transfer Protocol/Secure for outbound emails., 587, SMTPS Simple Mail Transfer Protocol/Secure for outbound emails., 123, NTP Network Time Protocol for syncing clocks on network., 161, SNMP Server - Simple Network Management Protocol. V1,V2 bad- V3 good., 162, SNMP Client - Simple Network Management Protocol. V1,V2 bad- V3 good., 389, LDAP Lightweight Directory Access Protocol- Acts as simplification/guide for searching in a directory., 636, LDAPS Lightweight Directory Access Protocol- Acts as simplification/guide for searching in a directory., 445, SMB Server Message Block- File Sharing on local network, not need for NETBIOS over TCP/IP., 514, Syslog Message Logging, 1433, SQL Structured Query Language Server is a RDBMS (Relational Database Management System), 3389, RDP Remote Desktop Protocol- IT Support, 5060, SIP Session Initiation Protocol - Think about voice calls/big sessions., 5061, SIPS Session Initiation Protocol - Think about voice calls/big sessions., ICMP, Internet Control Message Protocol.. Think PING, TCP Handshake, SYN (Sync) / SYN/ACK (Receiver acknowledges) / ACK (Sender acknowledges connection success)

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