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Common TCP/UDP Ports
Quickly practice common TCP/UDP ports
23
Computer Networking
Undergraduate 3
09/23/2014

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Cards

Term
What Application uses Port 20 TCP?
Definition
FTP (File Transfer Protocol) data
Term
What Application uses Port 21 TCP?
Definition
FTP control
Term
What Application uses Port 22 TCP?
Definition
SSH
Term
What Application uses Port 23 TCP?
Definition
Telnet
Term
What Application uses Port 25 TCP?
Definition
SMTP (Simple Mail Transfer Protocol)
Term
What Application uses Port 53 (TCP, UDP)?
Definition
DNS
Term
What Application uses Port 67 and 68 UDP?
Definition
DHCP (Dynamic Host Configuration Protocol)
Term
Port 69 (UDP)?
Definition
TFTP (Trivial FTP) UDP
Term
Port 80 TCP?
Definition
HTTP (WWW)
Term
Port 110 (TCP)?
Definition
POP3 (TCP)
Term
Port 161 (UDP)?
Definition
SNMP
Term
Port 443 (TCP)?
Definition
SSL (Secure Socket Layer) / HTTPS (TCP)
Term
Which port is used by FTP data?
Definition
20 (TCP)
Term
Which port is used by FTP control?
Definition
21
Term
Which port is used by SSH?
Definition
22 (TCP)
Term
Which port is used by Telnet?
Definition
Port 23 (TCP)
Term
Which port is used by SMTP?
Definition
Port 25 (TCP)
Term
Which port does DNS Use?
Definition
53 (both UDP, TCP)
Term
Which port[s] are used by DHCP?
Definition
67 AND 68!
Term
Which port is used by TFTP?
Definition
Port 69 - "Oooh laaa-laaa!"
Term
Which port is used by HTTP (WWW)?
Definition
Port 80 (TCP)
Term
Which port is used by SNMP?
Definition
Simple Network Management Protocol uses port  161!
Term
What is CSMA/CD Algorithm?
Definition
Carrier Sense Multiple Access with Collision Detection
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