Ports and Protocols

Question 1

TCP - FTP - used to transfer file from host to host

Answer 1

Port 21

Question 2

TCP/UDP - SSH, SCP, SFTP - Secure Shell is used to remotely administer network devices and systems. SCP is used for secure copy and SFTP for secure FTP

Answer 2

Port 22

Question 3

TCP/UDP - Telnet - unencrypted method to remotely administer network devices (should not be used)

Answer 3

Port 23

Question 4

TCP - SMTP - Simple Mail Transfer Protocol used to send email over the internet

Answer 4

Port 25

Question 5

TCP/UDP - DNS - Domain Name Service is used to resolved hostnames to IPs and IPs to hostnames

Answer 5

Port 53

Question 6

UDP - TFTP - Trivial FTP is used as a simplified version of FTP to put a file on a remote host, or get a file from a remote host

Answer 6

Port 69

Question 7

TCP - HTTP - used to transmit web page data to a client for unsecured web browsing

Answer 7

Port 80

Question 8

TCP/UDP - Kerberos - used for network authentication using a system of tickets within a Windows domain

Answer 8

Port 88

Question 9

TCP - POP3 - Post Office Protocol v3 is used to receive email from a mail server

Answer 9

Port 110

Question 10

TCP - NNTP - Network News Transfer Protocol is used to transport Usenet articles

Answer 10

Port 119

Question 11

TCP/UDP - NetBIOS - use to conduct name querying, sending of data, and other functions over a NetBIOS connection

Answer 11

Ports 137-139

Question 12

TCP - IMAP - Internet Message Access Protocol is used to receive email from a mail server with more features than POP3

Answer 12

Port 143

Question 13

UDP - SNMP - Simple Network Management Protocol is used to remotely monitor network devices

Answer 13

Port 161

Question 14

TCP/UDP - SNMPTRAP - Used to send Trap and InformRequests to the SNMP Manager on a network

Answer 14

Port 162

Question 15

TCP/UDP - LDAP - Lightweight Directory Access Protocol is used to maintain directories of users and other objects

Answer 15

Port 389

Question 16

TCP - HTTPS - used to transmit web page data to a client over an SSL/TLS encrypted connection

Answer 16

Port 443

Question 17

TCP - SMB - Server Message Block is used to provide shared access to files and other resources on a network

Answer 17

Port 445

Question 18

TCP - SMTP with SSL/TLS - SMTP with secured connection

Answer 18

Ports 465 & 587

Question 19

UDP - Syslog - computer message logging especially for routers and firewalls

Answer 19

Port 514

Question 20

TCP/UDP - LDAP SSL/TLS - directories of users and objects over encrypted SSL/TLS connection

Answer 20

Port 636

Question 21

TCP - iSCI - linking data storage facilities over IP

Answer 21

Port 860

Question 22

TCP - FTPS - transferring files from host to host over an encrypted connection

Answer 22

Ports 989 & 990

Question 23

TCP - IMAP4 with SSL/TLS - used to receive email from a mail server over an SSL/TLS encrypted connection

Answer 23

Port 993

Question 24

TCP - POP3 (SSL/TLS)

Answer 24

Port 995

Question 25

TCP - Ms-sql-s - SQL server used to receive SQL database queries from clients

Answer 25

Port 1433

Question 26

UDP - RADIUS (alternative) - Remote Authentication Dial-In User Service is used for authentication and authorization and accounting

Answer 26

Ports 1645 (authorization) & 1646 (accounting)

Question 27

UDP - L2TP - Layer 2 Tunnel Protocol is used as an underlying VPN protocol but has no inherent security. Should pair with IPSec

Answer 27

Port 1701

Question 28

TCP/UDP - PPTP - Point-to-Point Tunneling Protocol is an underlying VPN protocol with built-in security

Answer 28

Port 1723

Question 29

UDP - RADIUS - Remote Authentication Dial-In User Service is used for authentication and authorization and accounting

Answer 29

Ports 1812 (accounting) & 1813 (authorization)

Question 30

TCP/UDP - FCIP - Fiber Channel IP is used to encapsulate Fiber Channel frames within TCP/IP packets

Answer 30

Port 3225

Question 31

TCP - iSCI Target - listening port for a iSCIS targeted divides when linking data storage facilities over IP

Answer 31

Port 3260

Question 32

TCP/UDP - RDP - Remote Desktop Protocol is used to remotely view and control other Windows systems via a GUI

Answer 32

Port 3389

Question 33

TCP - Diameter - a more advanced AAA protocol that is a replacement for RADIUS

Answer 33

Port 3868

Question 34

TCP - Syslog over TLS - used to conduct computer message logging, especially for routers and firewall logs, over a TLS encrypted connection

Answer 34

Port 6514