Protocols And Ports

Question 1

FTP (file transfer protocol)

Answer 1

Original port - 21

Secure port - 989/990

TCP usage

Question 2

SSH (secure shell)

Answer 2

Original port - 22

Secure port - 22

TCP or UDP usage

Question 3

Telnet (telecommunication network)

Answer 3

Original port - 23

Not considered a secure protocol

TCP or UDP usage

Question 4

SMTP (simple mail transfer protocol)

Answer 4

Original port - 25

Secure port - 465 or 587

TCP usage

Question 5

DNS (domain name system)

Answer 5

Original port - 53

TCP or UDP usage

Question 6

DHCP (dynamic host configuration protocol)

Answer 6

Original port (server) - 67

Original port (client) - 68

TCP or UDP usage

Question 7

HTTP (hypertext transfer protocol)

Answer 7

Original port - 80

Secure port - 443 (HTTPS)

TCP usage

Question 8

POP3 (post office protocol version 3)

Answer 8

Original port - 110

Secure port - 995

TCP usage

Question 9

NetBIOS/NetBT

Answer 9

Original port - between 137-139

TCP or UDP usage

Question 10

IMAP (internet message Access protocol)

Answer 10

Original port - 143

Secure port - 993

TCP usage

Question 11

SNMP (simple network management protocol)

Answer 11

Original port - 161

UDP usage

Question 12

SNMPTRAP

Answer 12

Original port - 162

TCP or UDP usage

Question 13

LDAP (lightweight directory access protocol)

Answer 13

Original port - 389

Secure port - 636

TCP or UDP usage

Question 14

SLP (service location protocol)

Answer 14

Original port - 427

TCP or UDP usage

Question 15

SMB (server message block)

Answer 15

Original port - 445

TCP usage

Question 16

AFP (apple filing protocol)

Answer 16

Original port - 548

TCP usage

Question 17

RDP (Remote Desktop protocol)

Answer 17

Original port - 3389

TCP or UDP usage