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),

Network Protocols

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