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Study Guide: CompTIA A+ Core Certification: Common Protocols and Their Ports
Source: https://www.fatskills.com/comptia-a-exam/chapter/comptia-a-core-certification-common-protocols-and-their-ports

CompTIA A+ Core Certification: Common Protocols and Their Ports

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

⏱️ ~1 min read
Port Number(s) Protocol Port Type
20/21 File Transfer Protocol (FTP) TCP, UDP
22 Secure Shell (SSH) TCP, UDP
23 Telnet TCP, UDP
25 Simple Mail Transfer Protocol (SMTP) TCP, UDP
53 Domain Name System (DNS) TCP, UDP
67/68 Dynamic Host Configuration Protocol (DHCP) UDP
80 Hypertext Transfer Protocol (HTTP) TCP, UDP
110 Post Office Protocol 3 (POP3) TCP, UDP
137/139 Network Basic Input/Output System (NetBIOS)/NetBIOS over TCP/IP (NetBT) TCP, UDP
143 Internet Message Access Protocol (IMAP) TCP
161/162 Simple Network Management Protocol (SNMP) TCP, UDP
389 Lightweight Directory Access Protocol (LDAP) TCP, UDP
443 Hypertext Transfer Protocol Secure (HTTPS) TCP, UDP
445 Server Message Block (SMB)/Common Internet File System (CIFS) TCP
3389 Remote Desktop Protocol (RDP) TCP, UDP

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