Ports Flashcards
Port 20
TCP File Transfer Protocol (FTP) - Data
Port 21
TCP File Transfer Protocol (FTP) - Control
Port 22
TCP Secure Shell (SSH)
Port 23
TCP Telnet
Port 25
TCP Simple Mail Transfer Protocol (SMTP)
Port 53
UDP, TCP Domain Name Service (DNS)
Port 67
UDP Dynamic Host Configuration Protocol (DHCP) – Server
Port 68
UDP Dynamic Host Configuration Protocol – Client
Port 69
UDP Trivial File Transfer Protocol (TFTP)
Port 80
TCP Hypertext Transfer Protocol (HTTP)
Port 110
TCP Post Office Protocol version 3 (POP3)
Port 143
TCP Internet Message Access Protocol (IMAP)
Port 161
UDP Simple Network Management Protocol (SNMP)
Port 443
TCP Hypertext Transfer Protocol Secure (HTTPS)
What are Serice Names and Port Numbers
They are used to distinguish between different services that run over transport protocols such as TCP, UDP.
Well known Ports/ System Ports
0 - 1,023; Used for protocals.
User Ports / Registered Ports
1,024 - 49,151; Used for private companies.
Dynamic and/or Private Ports
49,152 - 65,535; Used for local computers.
All Operating systems must use the IANA port range’s /
False, Different OS in the past have used different ranges
What Private/Dynamic Port Range do many Linux kernels use?
32,768 - 61,000
What ports would be given if a computer wants to reach a server that only accepts HTTP?
The computer will put down its source port number being a private port number, and its destination port number being a well-known port number, HTTP would be 80.
command in windows to see the currently open session in ports?
netstat -n
