Concepts)
File Transfer Protocol (FTP) ANS: 20, 21
Provides Insecure file transfers.
Secure Shell (SSH) ANS: 22
Secure remote control of another machine using a text-based environment.
Secure File Transfer Protocol (SFTP) ANS: 22
Provides secure file transfers
Telnet ANS: 23
Provides insecure remote control of another machine using a text-based environment.
Simple Mail transfer Protocol (SMTP) ANS: 25
Provides the ability to send emails over the network.
Domain Name Service (DNS) ANS: 53
Converts domain names to IP addresses, and IP address to domain names.
,Dynamic Host Configuration Protocol (DHCP) ANS: 67, 68
Automatically provides network parameters to your clients, such as their assigned IP address, subnet
mask, default gateway, and the DNS server they should use.
Trivial File Transfer Protocol (TFTP) ANS: 69
Used as a lightweight file transfer method for sending configuration files or network booting of an
operating system.
Hyper Text Transfer Protocol (HTTP) ANS: 80
Used for insecure web browsing.
Post Office Protocol Version Three (POP3) ANS: 110
Used by local email clients to retrieve email from a remote server over a TCP IP connection.
Network Time Protocol (NTP) ANS: 123
Used to keep accurate time for clients on a network. (Clock Synchronisation).
Network Basic Input/output System (NetBIOS) ANS: 139
Used for file or printer sharing in a Windows network.
,Internet Mail Application Protocol (IMAP) ANS: 143
A newer method of retrieving incoming emails which improves upon the older POP3.
Simple Network Management Protocol (SNMP) ANS: 161, 162
Used to collect data about network devices and monitor their status. (routers, switches, VoIP phones).
Lightweight Directory Access Protocol (LDAP) ANS: 389
Used to provide directory services to your network.
Hypertext Transfer Protocol - Secure (HTTPS) ANS: 443
Used for secure web browsing.
Server Message Block (SMB) ANS: 445
Used for Windows file and printer sharing services.
System Logging Protocol (Syslog) ANS: 514
Used to send logging data back to a centralised server.
, Simple Mail Transfer Protocol Transport Layer Security (SMTP TLS) ANS: 587
Secure and encrypted way to send emails.
Lightweight Directory Access Protocol - Secure (LDAPS) ANS: 636
Provides secure directory services.
Internet Message Access Protocol over SSL (IMAP over SSL) ANS: 993
Secure and encrypted way to receive emails.
Post Office Protocol Version 3 over SSL (POP3 over SSL) ANS: 995
Secure and encrypted way to receive emails.
Structured Query Language Server Protocol (SQL) ANS: 1433
Used for communication from a client to the database engine.
SQLnet Protocol ANS: 1521
Used for communication from a client to an Oracle database.
MySQL ANS: 3306