Common Port Numbers

Question 1

FTP

Answer 1

File transfer protocol
Transfers files from device to device
Tcp/20 & 21

Question 2

SSH

Answer 2

Secure Shell
tcp/22

Question 3

Telenet

Answer 3

telecommunication network
login to devices remotely
tcp/23

Question 4

SMTP

Answer 4

simple mail transfer protocol
tcp/25

Question 5

DNS

Answer 5

domain name system
udp/53

Question 6

DHCP

Answer 6

dynamic host configuration protocol
udp/67 (server) & udp/68 (client)

Question 7

HTTP/HTTPS

Answer 7

tcp/80 & tcp/443

Question 8

POP3/IMAP

Answer 8

POP3- basic mail transfer - tcp/110
IMAP - management of multiple inboxes - tcp/143

Question 9

SNMP

Answer 9

simple network management protocol
gather stats from network devices
queries - udp/161
traps (alerts from devices) -udp/162

Question 10

LDAP

Answer 10

lightweight directory access protocol
directory that accesses user info
tcp/389

Question 11

RDP

Answer 11

remote desktop protocol
share desktop remotely
tcp/3389