Ports and Protocols

Question 1

1) Range of Well-known Ports
2) Range of Registered Ports
3) Range of Private / Dynamic / Ephemeral Ports

Answer 1

1) 0 to 1,023

2) 1,024 to 49,151

3) 49,152 to 65,535

Question 2

1) What layer of the OSI model does TCP and UDP operate at?

2) What layer of the OSI model does USB operate at?

3) What layer of the OSI model does IP and ICMP operate at?

4) What layer of the OSI model does NetBIOS operate at?

5) What layer of the OSI model does HTTP and Telnet operate at?

Answer 2

1) Transport – layer 4
2) Physical – layer 1
3) Network – layer 3
4) Session – layer 5
5) Application – layer 7

Question 3

Mail protocols

1) Standard protocol used for SENDING emails.
Operates over port 25
(The secure version operates over 465 or 587)

2) Used to RETRIVE emails.
Operates over port 110
(The secure version operates over port 995)

3) Used to RETRIVE emails.
Operates over port 143
(The secure version of this protocol operates over port 993)

Answer 3

1) SMTP (Simple Mail Transfer Protocol)
2) POP3 (Post Office Protocol v3)
3) IMAP (Internet Message Access Protocol)

Question 4

File Transfer Ports and Protocols

1) Operates over port 20 and 21

2) Operates over port 22

3) Operates over port 69
(basic version of FTP)

4) Operates over port 445

Answer 4

1) FTP (File Transfer Protocol)
2) SFTP (Secure File Transfer Protocol)
3) TFTP (Trivial File Transfer Protocol)
4) SMB (Server Message Block)

Question 5

Remote Access Ports and Protocols

1) Operates over port 22

2) Operates over port 23

3) Operates over port 3389

Answer 5

1) SSH (Secure Shell)
2) Telnet
3) RDP (Remote Desktop Protocol)

Question 6

Network Service Ports and Protocols

1) Operates over port 53

2) Operates over port 67 and 68

3) Operates over port 1433 and 3306

4) Operates over port 161 and 162

5) Operates over port 514

Answer 6

1) DNS (Domain Name System)
2) DHCP (Dynamic Host Configuration Protocol)
3) SQL Services
4) SNMP (Simple Network Management Protocol)
5) Syslog (System Logging)

Question 7

Other Ports and Protocols

1) Operates over port 123

2) Operates over port 5060 and 5061

3) Operates over port 389
(secure version operates over 636)

Answer 7

1) NTP (Network Time Protocol)
2) SIP (Session Initiation Protocol)
3) LDAP (Lightweight Directory Access Protocol)