1.1 Ports & Protocols

Question 1

Port for HTTP

Answer 1

TCP 80

Question 2

Port for SSH

Answer 2

TCP 22

Question 3

Port for SFTP

Answer 3

TCP 22

Question 4

Port for DNS

Answer 4

53

UDP to start then TCP if packet too large

Question 5

Port for SMTP

Answer 5

TCP 25

Question 6

Port for FTP

Answer 6

TCP/UDP 20 - for data

TCP/UDP 21 - for control

Question 7

Port for TFTP

Answer 7

UDP 69

Question 8

Port for TELNET

Answer 8

TCP 23

Question 9

Port for DHCP

Answer 9

UDP 67 - destination port of the servers

UDP 68 - for clients

Question 10

Port for HTTPS

Answer 10

TCP 443

Question 11

Port for SNMP

Answer 11

UDP 161

Question 12

Port for RDP

Answer 12

TCP/UDP 3389

Question 13

Port for NTP

Answer 13

UDP 123

Question 14

Port for SIP

Answer 14

TCP/UDP 5060 for non encrypted

TCP 5061 for encrypted using Transport Layer Security (TSL)

Question 15

Port for SMB

Answer 15

TCP/UDP 445

Question 16

Port for POP

Answer 16

TCP 110

Question 17

Port for IMAP

Answer 17

TCP 143

Question 18

Port for LDAP

Answer 18

TCP/UDP 389

Question 19

Port for LDAPS

Answer 19

TCP/UDP 636

Question 20

Port for H.232

Answer 20

TCP 1720

Question 21

What type of connection is IP protocol?

Explain what the connection type means.

Answer 21

Connectionless

Data received is not acknowledged.

Question 22

What type of connection is UDP protocol?

Explain what the connection type means.

Answer 22

Connectionless

Data received is not acknowledged.

Question 23

What type of connection is TCP?

Explain what the connection type means.

Answer 23

Connection Oriented

Provides acknowledgement upon successful delivery.

Question 24

What is ICMP?

What does it do?

Answer 24

Internet Control Message Protocol.

Used for internet signaling and error messages. Not used for data transport. Used by tools like pong and traceroute.