Ports/Protocols

Question 1

What is Port 80?

Answer 1

HTTP- Hyper Text Transfer Protocol
–Transmit web page data to client unsecured web browsing
–TCP

Question 2

What is Port 21?

Answer 2

FTP- File Transfer Protocol
–Transfer files from host to host
–TCP

Question 3

What is Port 22?

Answer 3

SSH- Secure Shell
SCP- Secure Copy Protocol
SFTP- Secure File Transfer Protocol
–Remote administration of network devices
–TCP/UDP

Question 4

What is Port 23?

Answer 4

Telnet
–Unencrypted remote network administration
–TCP/UDP
(Do not use)

Question 5

What is Port 25?

Answer 5

SMTP- Simple Mail Transfer Protocol
–Send mail over internet
–TCP

Question 6

What is Port 53?

Answer 6

DNS- Domain Name Service
–Resolve host names to IPs and vice versa
–TCP/UDP

Question 7

What is Port 69?

Answer 7

TFTP - Trivial FTP
–Simplified FTP, put or get file on remote host
–UDP

Question 8

What is Port 88?

Answer 8

Kerberos
–Network authentication using tickets in Windows
–TCP/UDP

Question 9

What is Port 110?

Answer 9

POP3- Post Office Protocol v3
–Receive email from mail server
–TCP

Question 10

What is Port 119?

Answer 10

NNTP- Network News Transfer Protocol
–Transport Usenet articles
–TCP

Question 11

What is Port 135?

Answer 11

RPC/DCOM-scm - Remote Procedure Call, to locate DCOM ports to request a service from program on another computer on the network
–TCP/UDP

Question 12

What is Port 137-139?

Answer 12

NetBIOS
137 - name query TCP/UDP
138 - Datagram sending data UDP
139 - session connection TCP

Question 13

What is Port 143?

Answer 13

IMAP - Internet Message Access Protocol
–To receive email from mail server, more features than POP3
–TCP

Question 14

What is Port 161?

Answer 14

Simple Network Management Protocol
–remotely monitor network devices
–UDP

Question 15

What is Port 162?

Answer 15

SNMPTRAP
– send trap and inform requests to SNMP manager on network
–TCP/UDP

Question 16

What is Port 389?

Answer 16

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

Question 17

What is Port 443?

Answer 17

HTTPS - Hypertext Transfer Protocol Secure
–transmit web page data to client over SSL/TLS
–TCP

Question 18

What is Port 445?

Answer 18

SMB - Server Message Block
–provide shared access to files/other resources over network
–TCP

Question 19

What is Port 465/587?

Answer 19

SMTP with SSL/TLS - Simple Mail Transfer Protocol
–send mail over internet w/ SSL/TLS secured connection
–TCP

Question 20

What is Port 514?

Answer 20

Syslog
– to conduct computer message logging, esp. for routers and firewall logs
–UDP

Question 21

What is Port 636?

Answer 21

LDAP SSL/TLS
– maintain directories of users/objects over SSL/TLS encrypted connection
–TCP/UDP

Question 22

What is Port 860?

Answer 22

iSCSI - internet Small Computer Systems Interface
–linking data storage facilities over IP
–TCP

Question 23

What is Port 989/990?

Answer 23

FTPS - File Transfer Protocol Secure
–transfer files host to host over encrypted connection
–TCP

Question 24

What is Port 993?

Answer 24

IMAP4 with SSL/TLS - Internet Message Access Protocol
– receive email from mail server over SSL/TLS
–TCP

Question 25

What is Port 995?

Answer 25

POP3 - Post office Protocol v3 --receive email from mail server over SSL/TLS --TCP

Question 26

What is Port 1433?

Answer 26

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

Question 27

What is Port 1645/1646?

Answer 27

Radius(alt.)- Remote Authentication Dial-In User Service --Authentication and Authorization (1645) --Accounting (1646) --UDP

Question 28

What is Port 1701?

Answer 28

L2TP - Layer 2 Tunnel Protocol --an underlying VPN protocol w/no inherent security --UDP

Question 29

What is Port 1723?

Answer 29

PPTP - Point-to-Point Tunneling Protocol --underlying VPN protocol w/ built-in security --TCP/UDP

Question 30

What is Port 1812/1813?

Answer 30

RADIUS - Remote Authentication Dial-In User Service --Authentication and Authorization (1812) --Accounting (1813) --UDP

Question 31

What is Port 3225?

Answer 31

FCIP - Fibre Channel IP --to encapsulate Fibre Channel frames within TCP/IP packets --TCP/UDP

Question 32

What is Port 3260?

Answer 32

iSCSI Target - internet Small Computer Systems --listening port for iSCSI-targeted devices when linking data storage facilities over IP --TCP

Question 33

What is Port 3389?

Answer 33

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

Question 34

What is Port 3868?

Answer 34

Diameter - more advanced AAA protocol to replace RADIUS --TCP

Question 35

What is Port 6514?

Answer 35

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