Ports

Question 1

tcp 20/21

Answer 1

FTP (File Transfer Protocol)

Question 2

tcp 22

Answer 2

SSH (Secure Shell)

Question 3

tcp 23

Answer 3

Telnet

Question 4

tcp 25

Answer 4

SMTP (Simple Mail Transfer Protocol)

Question 5

tcp/udp 53

Answer 5

DNS (Domain Name System)

Question 6

tcp 80

Answer 6

HTTP (HyperText Transfer Protocol)

Question 7

tcp 443

Answer 7

HTTPS (HyperText Transfer Protocol Secure)

Question 8

tcp 110

Answer 8

POP3 (Post Office Protocol v3)

Question 9

tcp 143

Answer 9

IMAP4 (Internet Message Access Protocol v4)

Question 10

tcp 3389

Answer 10

RDP (Remote Desktop Protocol)

Question 11

udp 137

Answer 11

NetBIOS (name service)

*Register, remove, and find Windows services by name

Question 12

udp 138

Answer 12

NetBIOS (datagram service)

*Windows connectionless data transfer

Question 13

tcp 139

Answer 13

NetBIOS (session service)

**Windows connection-oriented data transfer

Question 14

tcp 445

Answer 14

SMB (Server Message Block)

Question 15

tcp 548

Answer 15

AFP (Apple File Protocol)

Question 16

tcp/udp 427

Answer 16

SLP (Service Location Protocol)

Question 17

udp 67/68

Answer 17

DHCP (Dynamic Host Configuration Protocol)

Question 18

tcp 389

Answer 18

LDAP (Lightweight Directory Access Protocol)

Question 19

udp 161

Answer 19

SNMP (Simple Network Management Protocol)