Common Network Ports

Question 1

Both servers and the client need to know…

Answer 1

Port #’s for communication

Question 2

tcp/20

Answer 2

FTP (File Transfer Protocol); Handing over active data

Question 3

tcp/21

Answer 3

FTP(File Transfer Protocol); where to send the data

Question 4

tcp/23

Answer 4

Telnet; non-encrypted communication link

Question 5

tcp/22

Answer 5

SSH (secure shell); encrypted communication link

Question 6

tcp/25

Answer 6

SMTP (Simple Mail Transfer Protocol); to send off mail only

Question 7

udp/53

Answer 7

DNS(Domain Name System); convert website names to IP addresses

Question 8

tcp/80

Answer 8

HTTP (Hypertext transfer Protocol); Web server communication

Question 8

udp/67 & udp/68

Answer 8

DHCP(Dynamic Host Configuration Protocol); automated assigning of IP address to any device that joins a network

Question 9

tcp/443

Answer 9

HTTPS (Hypertext transfer Protocol); Web server communication w/ encryption

Question 10

tcp/445

Answer 10

SMB (Server Message Block); used in windows environments for file sharing

Question 11

udp/137

Answer 11

NetBIOS; name services

Question 12

tcp/139

Answer 12

NetBIOS; session service

Question 13

tcp/110

Answer 13

POP3; basic mail function

Question 14

tcp/143

Answer 14

IMAP; email clients and services to retrieve messages from a server.

Question 15

udp/161

Answer 15

SNMP(Simple Network Management Protocol); Request from SNMP manager

Question 16

udp/162

Answer 16

SNMP(Simple Network Management Protocol); Reports to the SNMP manager

Question 17

tcp/389

Answer 17

LDAP (Lightweight Directory Access Protocol); Used to access and manage directory information over a network

Question 18

tcp/3389

Answer 18

RDP (Remote Desktop Protocol); Protocol used by windows that allows you to share a desktop remotely