Port Number

Question 1

Telnet replace with SSH

Answer 1

TCP 23

Question 2

FTP replace with SFTP or FTPS

Answer 2

TCP 20 Active Mode
21 Control Connection

Question 3

TFTP Trivial File transfer Protocol
Should not be use

Answer 3

UDP 69

Question 4

SMTP use TLS SMTPS

Answer 4

TCP 25465587

Question 5

POP3 TLS POPS

Answer 5

110

Question 6

IMAP TLS IMAPS

Answer 6

143

Question 7

DHCP

Answer 7

67 Server
68 Client

Question 8

Https

Answer 8

443

Question 9

Line Printer DAemon LPD VPN

Answer 9

515

Question 10

X window VPN

Answer 10

6000 - 6063

Question 11

NFS Network File System VPN

Answer 11

2049

Question 12

SNMP use Version 3 Simple Network Management Protocol

Answer 12

UDP 161
162 For Trap message

Question 13

PPTP Layer 2

Answer 13

TCP 1723

Question 14

SSH encrypt SFTP SEXEC SLOGIN SCP
Transport Mode Only

Answer 14

TCP 22

Question 15

Kerberos

Answer 15

88

Question 16

L2TP Layer 2 Tunneling Prorocol

Answer 16

1701

Question 17

DNS

Answer 17

53

Question 18

Syslog

Answer 18

UDP 514

Question 19

RIP Routing Information Protocol

Answer 19

UDP 520 IPv6 521

Question 20

OSPF Open Shortest Path First

Answer 20

89 but does not use UDP or TCP

Question 21

NetBios

Answer 21

137-139 UDP 137 138 TCP 139

Question 22

Microsoft SQL

Answer 22

1433-1434

Question 23

Microsoft Directory Service

Answer 23

445

Question 24

TACACS

Answer 24

49

Question 25

RADIUS

Answer 25

1812

Question 26

MySQL

Answer 26

3306

Question 27

Oracle

Answer 27

1521

Question 28

H.323 VoIP

Answer 28

1720

Question 29

RDP Remote Desktop Protocol

Answer 29

3389

Question 30

RDP Remote Desktop Protocol

Answer 30

3389