Network Ports Flashcards
Port number: 21
File Transfer Protocol
(FTP) is a standard communication protocol used for the transfer of computer files from a server to a client on a computer network
Connection: TCP
Port Number: 22
Secure Shell (SSH)
is a cryptographic network protocol for operating network services securely over an unsecured network.
Connection: TCP
Port Number: 23
Telnet
Telnet is a network protocol used to virtually access a computer and to provide a two-way, collaborative and text-based communication channel between two machines.
Connection: TCP
Port Number: 25
Simple Mail Transport Protocol
(SMTP)
is an internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send and receive mail messages.
Connection: TCP
Port Number: 53
Domain Name Server
DNS translates domain names to IP addresses so browsers can load Internet resources.
DNS uses the User Datagram Protocol (UDP) on port 53 to serve DNS queries. UDP is preferred because it is
fast and has low overhead.
Connection: TCP/UDP
Port Number: 67, 68
DHCP is a network protocol to used to configure IP networks. A DHCP server listens to UDP port 67 and dynamically assigns IP addresses and other network parameters to DHCP clients. These clients will listen for responses on UDP port 68.
Connection: UDP
Port Number: 80
Hyper Text Transfer Protocol
Port 80 is the port number assigned to commonly used internet communication protocol, Hypertext Transfer Protocol (HTTP). TCP connection
Connection: TCP/UDP
Port Number: 110
Post Office Protocol (POP3)
POP3 Post Office Protocol version 3 (POP3) is one of the two protocols that receive e-mail from SMTP servers. POP3 uses TCP port 110.
Connection: TCP
Port Number: 137
NetBIOS Name Service
Enabling NetBIOS services provide access to shared resources like files and printers not only to your network computers but also to anyone across the internet.
Connection: TCP/UDP
Port Number: 143
Internet Message Access Protocol (IMAP4)
IMAP is a protocol used for the management of eMail storage on a mail server, it is commonly used by an email user/client to view, access and edit the messages on the remote server, and emulate an experience of the message actually been stored locally on the end user’s computer.
Connection: TCP
Port Number: 443
Secure HTTP (HTTPS)
Port 443 is the standard port for all secured HTTP traffic, meaning it’s absolutely essential for most modern web activity. Encryption is necessary to protect information, as it makes its way between your computer and a web server.
Connection: TCP/UDP
Port Number: 445
Microsoft-DS (Active Directory)
Port 445 is a traditional Microsoft networking port with tie-ins to the original NetBIOS service found in earlier versions of Windows OSes. Today, port 445 is used by Microsoft Directory Services for Active Directory (AD) and for the Server Message Block (SMB) protocol over TCP/IP.
Connection: TCP
Port Number: 161
SNMP
Simple Network Management Protocol
Port Number: 69
TFTP / Trivial File Transport Protocol
Port Number: 20
FTP Data
TCP
