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Security Plus Ports

68 community-sourced questions and answers. Free — no login.

Community-sourced. Answers may be wrong or out of date. Always verify with your official training portal before submitting. Not affiliated with any branch, agency, or vendor. Details.
QUESTION 1

TACACS (Terminal Access Controller Access-Control System)

ANSWER

49

QUESTION 2

FTP (File Transfer Protocol)

ANSWER

20/21

QUESTION 3

HTTP (Hypertext Transfer Protocol)

ANSWER

80

QUESTION 4

POP3 (Post Office Protocol)

ANSWER

110

QUESTION 5

HTTPS (Hypertext Transfer Protocol Secure)

ANSWER

443

QUESTION 6

DNS (Domain Name System)

ANSWER

53

QUESTION 7

SMTP (Simple Mail Transport Protocol)

ANSWER

25

QUESTION 8

IMAP4 (Internet Message Access Protocol)

ANSWER

143

QUESTION 9

DHCP (Dynamic Host Configuration Protocol)

ANSWER

67/68

QUESTION 10

SNMP (Simple Network Management Protocol)

ANSWER

63

QUESTION 11

SNMP UDP (User Datagram Protocol)

ANSWER

161

QUESTION 12

Telnet

ANSWER

tcp/23

QUESTION 13

NTP (Network Time Protocol)

ANSWER

123

QUESTION 14

NNTP (Network News Transfer Protocol)

ANSWER

119

QUESTION 15

SSH (SECURE SHELL)

ANSWER

22

QUESTION 16

LDAP (Lightweight Directory Access Protocol)

ANSWER

389

QUESTION 17

LDAP SSL (Secure Socket Layer)

ANSWER

636

QUESTION 18

TFTP (Trivial File Transfer Protocol) UDP

ANSWER

69

QUESTION 19

Encapsulation Header (ESP)

ANSWER

50

QUESTION 20

Authentication Header (AH)

ANSWER

51

QUESTION 21

L2TP (Layer 2 Tunneling Protocol) UDP

ANSWER

1701

QUESTION 22

PPTP (Point-to-Point Tunneling Protocol)

ANSWER

1723

QUESTION 23

NetBIOS services (udp)

ANSWER

137/138

QUESTION 24

Kerberos

ANSWER

88

QUESTION 25

Internet Key Exchange (IKE) UDP

ANSWER

500

QUESTION 26

SQL Service

ANSWER

156

QUESTION 27

Remote Desktop (RDP)

ANSWER

3389

QUESTION 28

Echo

ANSWER

7

QUESTION 29

RADIUS

ANSWER

1812/1813

QUESTION 30

IPSec (Internet Protocol Security)

ANSWER

1293

QUESTION 31

FTPS (FTP over SSL)

ANSWER

989/990

QUESTION 32

NETBIOS (tcp)

ANSWER

139

QUESTION 33

SYSLOG

ANSWER

514

QUESTION 34

ISAKMP (VPN) - Internet Security Association and Key Management Protocol

ANSWER

500

QUESTION 35

SSL VPN (Secure Sockets Layer Virtual Private Network)

ANSWER

443

QUESTION 36

Finger

ANSWER

79

QUESTION 37

SCP (Secure Copy) *uses SSH

ANSWER

22

QUESTION 38

SFTP (Secure FTP) *uses SSH

ANSWER

22

QUESTION 39

FTP control port

ANSWER

File Trasfer Protocol tcp/21 This port is use for communication to find out what you want to transfer ,

QUESTION 40

FTP Data in active mode Port

ANSWER

File Transfer Protocol tcp/20 This port is used when data is actually transferred.

QUESTION 41

SFTP

ANSWER

Secure Shell File Transfer Protocol tcp/22. Because it uses SSH to communicate it uses the same port.

QUESTION 42

FTPS Control Port

ANSWER

File Transfer Protocol Secure Sockets Layer tcp/990 - this port is use for communication to find out what you want to transfer

QUESTION 43

FTPS Data in Active Mode port

ANSWER

File Transfer Protocol Secure Sockets Layer tcp/989 Used for the actual transfer of data

QUESTION 44

TFTP

ANSWER

Trivial File Transfer Protocol udp/69

QUESTION 45

HTTP

ANSWER

tcp/80

QUESTION 46

HTTPS

ANSWER

tcp/442 and 443

QUESTION 47

SCP

ANSWER

Secure Copy Protocol tcp/22. Because it uses SSH to communicate it uses the same port.

QUESTION 48

SSH

ANSWER

tcp/22

QUESTION 49

NETBIOS Session Service

ANSWER

tcp/139 (Session Service)

QUESTION 50

NETBIOS Name Service

ANSWER

udp/137 (name service)

QUESTION 51

NETBIOS Datagram Service

ANSWER

udp/138 (datagram Service)

QUESTION 52

SMTP

ANSWER

Simple Mail Transfer Protocol tcp/25

QUESTION 53

DNS

ANSWER

TCP & UDP 53.

QUESTION 54

SNMP

ANSWER

Simple Network Message Protocol udp 161 and 162

QUESTION 55

SSL

ANSWER

442 tcp or udp?

QUESTION 56

TCP or UDP

ANSWER

Port 1024 is reserved for tcp or udp and should not be used anywhere else

QUESTION 57

BootP AND DHCP

ANSWER

udp/67, 68

QUESTION 58

POP3

ANSWER

tcp/110

QUESTION 59

IMAP

ANSWER

tcp 143

QUESTION 60

Registered Internet Applications Port Ranges

ANSWER

ports 1 - 1024

QUESTION 61

All port numbers

ANSWER

0 - 65,535

QUESTION 62

Non-ephemeral ports

ANSWER

permanent ports

QUESTION 63

Ephemeral ports

ANSWER

temporary ports

QUESTION 64

Registered Ports

ANSWER

1024 - 49151

QUESTION 65

What are Dynamic Ports?

ANSWER

(Short lived) Transport protocol ports for IP communications. Allocated automatically by the TCP/IP stack software from the IANA -

QUESTION 66

What Protocols use Dynamic Ports?

ANSWER

Typically used by TCP, UDP, or Stream Control Transmission Protocol (SCTP)

QUESTION 67

Dynamic Ports Range

ANSWER

suggested range of 49152 to 65535

QUESTION 68

Socket

ANSWER

IP address + Port number = socket

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