CompTIA Security+ SY0-501 Ports

TACACS+ (Terminal Access Controller Access-Control System Plus) is a security protocol that provides centralized authentication, authorization, and accounting, and it uses TCP port 49.

LDAPS (Lightweight Directory Access Protocol over SSL) is the secure version of LDAP and uses TCP port 636.

DNS (Domain Name System) queries typically use UDP port 53 for standard lookups to minimize overhead, though TCP 53 is used for zone transfers.

SIP (Session Initiation Protocol) is a signaling protocol used for initiating, maintaining, and terminating real-time sessions like VoIP, and it uses TCP/UDP port 5060.

RDP (Remote Desktop Protocol) is a proprietary protocol developed by Microsoft that provides a user with a graphical interface to connect to another computer over a network connection, using TCP port 3389.

SMB (Server Message Block) is a network file sharing protocol that uses TCP port 445 in modern implementations.

TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol used for booting diskless workstations or transferring configuration files, and it uses UDP port 69.

FTP (File Transfer Protocol) uses two ports: TCP port 21 for control commands and TCP port 20 for data transfer.

HTTPS (Hypertext Transfer Protocol Secure) is the secure version of HTTP, which encrypts communications using TLS/SSL and operates on TCP port 443.

LDAP (Lightweight Directory Access Protocol) is an open, vendor-neutral industry standard for accessing and maintaining distributed directory information services, using TCP port 389.

POP3 (Post Office Protocol version 3) is a standard mail protocol used to receive emails from a remote server to a local client. It operates over TCP port 110.

Diameter is an authentication, authorization, and accounting protocol for computer networks. It uses SCTP (Stream Control Transmission Protocol) on port 3868.

While standard DNS queries use UDP port 53, DNS zone transfers require a reliable connection to ensure data integrity, so they use TCP port 53.

Kerberos is a network authentication protocol designed to provide strong authentication for client/server applications by using secret-key cryptography. It uses TCP port 88.

FTPS (FTP over SSL/TLS) adds support for the Transport Layer Security and the Secure Sockets Layer cryptographic protocols. It uses ports 989 and 990.

SCP uses SSH for secure file transfer, which operates on TCP port 22. SMTP uses port 25, SNMP uses UDP 161, and RADIUS uses UDP 1812.

SMTP uses TCP port 25 for email transmission between mail servers. FTP uses port 20, Kerberos uses UDP 88, and TFTP uses UDP 69.