Ports

Question 1

20

Answer 1

File Transfer Protocol (FTP) Data Transfer

Question 2

21

Answer 2

File Transfer Protocol (FTP) Command Control

Question 3

22

Answer 3

Secure Shell (SSH)

Question 4

23

Answer 4

Telnet - Remote login service, unencrypted text messages

Question 5

25

Answer 5

Simple Mail Transfer Protocol (SMTP) E-mail Routing

Question 6

53

Answer 6

Domain Name System (DNS) service

Question 7

80

Answer 7

Hypertext Transfer Protocol (HTTP) used in World Wide Web

Question 8

110

Answer 8

Post Office Protocol (POP3) used by e-mail clients to retrieve e-mail from a server

Question 9

119

Answer 9

Network News Transfer Protocol (NNTP)

Question 10

123

Answer 10

Network Time Protocol (NTP)

Question 11

143

Answer 11

Internet Message Access Protocol (IMAP) Management of Digital Mail

Question 12

161

Answer 12

Simple Network Management Protocol (SNMP)

Question 13

194

Answer 13

Internet Relay Chat (IRC)

Question 14

443

Answer 14

HTTP Secure (HTTPS) HTTP over TLS/SSL

Question 15

67

Answer 15

Bootstrap Protocol (BOOTP) server

Question 16

68

Answer 16

Bootstrap Protocol (BOOTP) client

Question 17

69

Answer 17

Trivial File Transfer Protocol (TFTP)

Question 18

69

Answer 18

Trivial File Transfer Protocol (TFTP)

Question 19

49

Answer 19

TACACS Login Host protocol

Question 20

88

Answer 20

Kerberos authentication system

Question 21

137

Answer 21

NetBIOS Name Service

Question 22

138

Answer 22

NetBIOS Datagram Service

Question 23

139

Answer 23

NetBIOS Session Service

Question 24

389

Answer 24

Lightweight Directory Access Protocol (LDAP)

Question 25

445

Answer 25

Microsoft-DS (Directory Services) SMB file sharing

Question 26

500

Answer 26

Internet Security Association and Key Management Protocol (ISAKMP) / Internet Key Exchange (IKE)

Question 27

520

Answer 27

Routing Information Protocol (RIP)

Question 28

546

Answer 28

DHCPv6 client

Question 29

547

Answer 29

DHCPv6 server

Question 30

636

Answer 30

Lightweight Directory Access Protocol over TLS/SSL (SLDAP)

Question 31

1512

Answer 31

Microsoft's Windows Internet Name Service (WINS)

Question 32

1701

Answer 32

Layer 2 Tunneling Protocol (L2TP)

Question 33

1723

Answer 33

Point-to-Point Tunneling Protocol (PPTP)

Question 34

1720

Answer 34

H.323 call signaling

Question 35

1812

Answer 35

RADIUS authentication protocol

Question 36

1813

Answer 36

RADIUS accounting protocol

Question 37

3389

Answer 37

Microsoft Terminal Server (RDP)

Question 38

5004

Answer 38

Real-time Transport Protocol media data (RTP)

Question 39

5005

Answer 39

Real-time Transport Protocol control protocol (RTCP)

Question 40

5060

Answer 40

Session Initiation Protocol (SIP)

Question 41

5061

Answer 41

Session Initiation Protocol (SIP) over TLS