Ports And Protocols

Question 1

FTP

Answer 1

Port 20,21
File transfer

Question 2

SSH

Answer 2

22
Secure Remote access

Question 3

SFTP

Answer 3

Port 22
Secure file transfer

Question 4

Telnet

Answer 4

Port 23
Insecure remote access

Question 5

SMTP

Answer 5

Port 25
Sending emails

Question 6

DNS

Answer 6

Port 53
Domain name service

Question 7

DHCP

Answer 7

Ports 67,68
Dynamic host control

Question 8

TFTP

Answer 8

Port 69
Trivial file transfer
Lightweight transfer method for sending config files or network booting of OS

Question 9

HTTP

Answer 9

Port 80
Web browser

Question 10

POP3

Answer 10

Port 110
Receiving emails

Question 11

NTP

Answer 11

Port 123
Network time
Used to keep accurate time for clients on network

Question 12

NetBIOS

Answer 12

Port 139
Windows file sharing

Question 13

IMAP

Answer 13

Port 143
Receiving emails

Question 14

SNMP

Answer 14

161,162
Network management

Question 15

LDAP

Answer 15

389
Lightweight directory services

Question 16

HTTPS

Answer 16

443
Secure web browser

Question 17

SMB

Answer 17

445
Windows file sharing

Question 18

Syslog

Answer 18

514
System logging

Question 19

SMTP TLS

Answer 19

587
Secure sending emails

Question 20

LDAPS

Answer 20

636
Secure directory services

Question 21

IMAP SSL

Answer 21

993
Secure receiving emails

Question 22

POP3 SSL

Answer 22

995
Secure receiving emails

Question 23

SQL

Answer 23

1433
Database communication

Question 24

SQLnet

Answer 24

1521
Oracle DB communication

Question 25

MySQL

Answer 25

3306 MySQL DB communication

Question 26

RDP

Answer 26

3389 Remote Desktop

Question 27

SIP

Answer 27

5060,5061 VoIP and video calls

Question 28

Kerberos

Answer 28

Port 88 -Network Authentication protocol -Integrates with AD and uses ticketing system instead of sending passwords over insecure network -allows nodes to communicate over non-secure network to prove their identity in a secure manner.

Question 29

RADIUS

Answer 29

Remote Authentication Dail-In User Service Port 1812 Authentication messages Port 1813 Accounting messages Uses 802.1x and EAP Layer 7 OSI UDP Faster than TACACS+ AAA through RADIUS uses Server secret key (key mismatch could cause log in problems)

Question 30

TACACS+

Answer 30

-Terminal Access Controller Access Control System Plus -Authentication -Cisco proprietary protocol -TCP -Slower than RADIUS Port 49