2.1a - Common Network Ports

Question 1

What is FTP?

Answer 1

File Transfer Protocol

Sends and receives files between systems

Question 2

What are the FTP (File Transfer Protocol) tcp/ ports (active and control modes)?

Answer 2

tcp/20 (active mode data), tcp/21 (control)

•Transfers files between systems

Question 3

What is SSH?

Answer 3

Secure Shell
Encrypted console access

Encrypted communication link
• Looks and acts the same as Telnet

Question 4

What is the SSH TCP Port?

Answer 4

tcp/22

Question 5

What is Telnet?

Answer 5

Telecommunication Network

Insecure console access

Question 6

What is the Telnet TCP port?

Answer 6

tcp/23

Question 7

What is SMTP

Answer 7

Simple Mail Transfer Protocol
•Transfer email between mail servers
• Used to send mail from a device to a mail server
• Commonly configured on mobile devices
and email clients

Question 8

What is the SMTP (Simple Mail Transfer Protocol) TCP port?

Answer 8

tcp/25

Question 9

What is DNS?

Answer 9

Domain Name System

•Convert domain names to IP addresses

Question 10

What is the UDP port for the DNS?

Answer 10

udp/53

Question 11

What is HTTP and HTTPS?

Answer 11

HTTP - Web server communica

HTTPS - Web server communicaCon with encrypCon

Question 12

What is the POP3 tcp port?

Answer 12

tcp/110

Question 13

What is the IMAP4 tcp port?

Answer 13

tcp/143

Question 14

What is RDP and it’s key attributes?

Answer 14

Remote Desktop Protocol
• Share a desktop from a remote location
• Remote Desktop Services on many Windows versions
• Can connect to an entire desktop or just an application
• Clients for Windows, macOS, Linux, Unix,
iPhone, Android, and others

Question 15

What is the RDP (remote desktop protocol) tcp port?

Answer 15

tcp/3389

Question 16

What is SMB and what are it’s key attributes?

Answer 16

Server Message Block
Protocol used by Microsoft Windows
• File sharing, printer sharing
• Also called CIFS (Common Internet File System)

Question 17

What is SMB’s tcp port?

Answer 17

tcp/443

Question 18

What is AFP and it’s key attributes?

Answer 18

Apple Filing Protocol
• File services in macOS
• File management
• Copy, move, delete files
• Works with SLP (Service Location Protocol)
• Populates the list of available devices

Question 19

What are AFP’s (Apple Filing Protocol) key ports?

Answer 19

File services in macOS - tcp/548

Works with SLP (Service Location Protocol)

Question 20

What is DHCP and it’s key attributes?

Answer 20

Dynamic Host Configuration Protocol
• Automated configuration of IP address, subnet mask
and other options
• Requires a DHCP server
• Server, appliance, integrated into a SOHO router, etc.

• Dynamic / pooled
• IP addresses are assigned in real-time from a pool
• Each system is given a lease and must renew
at set intervals

• DHCP reservation
  
  • Addresses are assigned by MAC address in the DHCP server
  • Quickly manage addresses from one location

Question 21

What are the key port used by DHCP?

Answer 21

udp/67

udp/68

Question 22

What is LDAP and it’s key attributes?

Answer 22

• Store and retrieve information in a network directory

* Commonly used in Microsoft Active Directory

Question 23

What is the LDAP tcp port?

Answer 23

tcp/389

Question 24

What is SNMP and what are it’s key attributes?

Answer 24

Simple Network Management Protocol
• Gather statistics from network devices

SNMP v3 – A secure standard
• Message integrity
• Authentication, encryption

Question 25

What are SNMP’s ports for Queries and Traps?

Answer 25

Queries: udp/161
Traps: udp/162

Question 26

What is HTTP’s tcp port?

Answer 26

tcp/80

Question 27

What is HTTPS tcp port?

Answer 27

tcp/443

Question 28

What are NetBIOS’s three variation’s ports?

Answer 28

• udp/137 - NetBIOS name services (nbname)
• udp/138 - NetBIOS datagram service (nbdatagram)
• tcp/139 - NetBIOS session service (nbsession)

Question 29

What is SLP?

Answer 29

Service Location Protocol

• Works AFP to find Mac OS services by name