TCP Ports

Question 1

File Transfer Protocol

Answer 1

21 (FTP)

Question 2

Secure Shell/FTP over SSH

Answer 2

22 (SSH/SFTP)

Question 3

Telnet – an unsecure remote administration interface

Answer 3

23 (TELNET)

Question 4

Simple Mail Transfer Protocol

Answer 4

25 (SMTP)

Question 5

Domain Name System uses TCP for zone transfers

Answer 5

53 (DNS)

Question 6

HyperText Transfer Protocol

Answer 6

80 (HTTP)

Question 7

Post Office Protocol is a legacy mailbox access protocol

Answer 7

110 (POP3)

Question 8

Maps Remote Procedure Call (RPC) services to port numbers in a UNIX-like
environment

Answer 8

111 (RPCBIND)

Question 9

Advertises what RPC services are available in a Windows environment

Answer 9

135 (MSRPC)

Question 10

NetBIOS Session Service supports Windows File Sharing with pre-Windows 2000
version hosts

Answer 10

139 (NETBIOS-SSN)

Question 11

Internet Mail Access Protocol

Answer 11

143 (IMAP)

Question 12

HyperText Transfer Protocol Secure

Answer 12

443 (HTTPS)

Question 13

Supports Windows File Sharing (Server Message Block over TCP/IP) on current
Windows networks

Answer 13

445 (MICROSOFT-DS)

Question 14

Internet Mail Access Protocol Secure

Answer 14

993(IMAPS)

Question 15

Post Office Protocol Secure

Answer 15

995 (POP3S)

Question 16

Point-to-Point Tunneling Protocol is a legacy VPN protocol with weak security
implementation

Answer 16

1723 (PPTP)

Question 17

MySQL database connection

Answer 17

3306 (MySQL)

Question 18

Remote Desktop Protocol

Answer 18

3389 (RDP)

Question 19

Virtual Network Computing remote access service where security is
implementation dependent and VNC may use other ports

Answer 19

5900 (VNC)

Question 20

HTTP Proxy Service or alternate port for HTTP

Answer 20

8080 (HTTP-PROXY)