Ports, Protocols & Applications

Question 1

What is Telnet?

Answer 1

Telnet is a network protocol used to provide a bidirectional interactive text based communications between a local and remote host.

Question 2

What port(s) and protocols does telnet use for communications?

Answer 2

Telnet communicates via Port 23 and uses both TCP & UDP.

Question 3

What port(s) and protocols does File Transfer Protocol (FTP) use for data transfers?

Answer 3

FTP uses UDP & TCP for data transfer on Port 20.

Question 4

What port(s) and protocols does Secure Shell (SSH) use for communications?

Answer 4

SSH uses both UDP and TCP for secure logins, file transfers (SCP, SFTP) over Port 22.

Question 5

What port(s) and protocols does Simple Mail Transfer Protocol (SMTP) use?

Answer 5

SMTP uses the TCP protocol over Port 25.

Question 6

What port(s) and protocols does Network Time Protocol (NTP) use?

Answer 6

NTP uses UDP over Port 123.

Question 7

What port(s) and protocols does the Domain Name System (DNS) use?

Answer 7

DNS uses both UDP & TCP over port 53.

Question 8

What port(s) and protocols does a BOOTP Server use for communications?

Answer 8

BOOTP Servers uses UDP over Port 67 for communications.

Question 9

What port(s) and protocols does the Bootstrap Protocol (BOOTP) use if it is a BOOTP Client?

Answer 9

BOOTP uses UDP over Port 68 as a BOOTP Client.

Question 10

What port(s) and protocols is used by a DHCP Server?

Answer 10

A DHCP Server uses UDP over Port 67.

Question 11

What port(s) and protocols is used by a DHCP Client?

Answer 11

A DHCP Client uses UDP to communicate to a DHCP Server over Port 68.

Question 12

What port(s) and protocols is used by a HTTP?

Answer 12

HTTP uses TCP over Port 80

Question 13

What port(s) and protocols is used by Kerberos?

Answer 13

Kerberos uses both TCP & UDP over Port 88.

Question 14

What port(s) and protocols is used by POP (Post Office Protocol) v2?

Answer 14

POP v2 uses TCP over port 109.

Question 15

What port(s) and protocols is used by POP (Post Office Protocol) v3?

Answer 15

POP v3 uses TCP over port 110.

Question 16

What ports(s) and protocols doe the Microsoft End Point Mapper (EPMAP), AKA the RPC Locator service use?

Answer 16

The EPMAP or RPC Locator service uses TCP & UDP over Port 135.

Question 17

What port(s) and protocols does NetBIOS Name Service use?

Answer 17

The NetBIOS Name Services uses both TCP & UDP over Port 137.

Question 18

What port(s) and protocols does NetBIOS Datagram Service use?

Answer 18

The NetBIOS Datagram Services uses both TCP & UDP over Port 138.

Question 19

What port(s) and protocols does NetBIOS Session Service use?

Answer 19

The NetBIOS Session Service uses both TCP & UDP over Port 139.

Question 20

What port(s) and protocols does IMAP (Internet Message Access Protocol) use?

Answer 20

The IMAP uses TCP over Port 143.

Question 21

What ports(s) and protocols does BGP (Border Gateway Protocol) use?

Answer 21

BGP uses TCP over port 179.

Question 22

What ports(s) and protocols does SNMP (Simple Network Management Protocol) use?

Answer 22

SNMP uses UDP over Port 161.

Question 23

What ports(s) and protocols does an SNMP (Simple Network Management Protocol) Trap use?

Answer 23

The SNMP Trap uses TCP & UDP over Port 162.

Question 24

What ports(s) and protocols does LDAP (Lightweight Directory Access Protocol) use?

Answer 24

LDAP uses TCP & UDP over Port 389.

Question 25

What port(s) and protocols does HTTPS use?

Answer 25

HTTPS uses TCP over Port 443.

Question 26

What ports) and protocols does Syslog use?

Answer 26

Syslog uses UDP over Port 514

Question 27

What port(s) and protocol is used by RIP (Routing Information Protocol)?

Answer 27

RIP uses UDP over Port 530.

Question 28

What port(s) and protocols does File Transfer Protocol (FTP) use for communications?

Answer 28

FTP uses TCP over Port 21 for command (control) communications.