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Ports and Protocols Flashcards

Just a brief overview of Protocols and the Ports they use

1
Q

Well Known Ports

A

0-1023

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2
Q

What is FTP

A

File Transfer Protocol

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3
Q

What port is FTP (data)

A

TCP/UDP 20

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4
Q

What port is FTP (control)

A

TCP 21

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5
Q

What is SSH

A

Secure Shell

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6
Q

What port is SSH

A

TCP/UDP 22

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7
Q

What is TELNET

A

Legacy and insecure way of remote connection

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8
Q

What port is Telnet

A

TCP/UDP 23

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9
Q

What is SMTP

A

Simple Mail Transfer Protocol

Used for sending emails over the internet.

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10
Q

What port does SMTP use

A

TCP 25

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11
Q

What is DNS

A

Domain Name System

Resolves human readable domain names into IP addresses

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12
Q

What port does DNS use

A

TCP/UDP 53

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13
Q

What is DHCP

A

Dynamic Host Configuration Protocol

Automatically assigns IP addresses to hosts on a network

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14
Q

What Port does DCHP use

A

UDP 67 (IPv4 client)
UDP 68 (IPv4 server)
TCP/UDP 546 (IPv6 client
TCP/UDP 547 (IPv6 server)

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15
Q

What is TFTP

A

Trivial File Transfer Protocol

FTP that uses UDP

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16
Q

What port does TFTP use

A

UDP 69

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17
Q

What is HTTP

A

Hypertext Transfer Protocol

method for encoding and transporting information between a client (web browser) and a web server.

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18
Q

What port does HTTP use

A

TCP 80

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19
Q

What is Kerberos

A

Network authentication protocol using tickets, not certificates

Used in Windows domain environments (Active Directory)

Provides mutual authentication and single sign-on (SSO)

Does not use X.509 certificates

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20
Q

What port does Kerberos use

A

TCP/UDP 88

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21
Q

What is POP3

A

Post Office Protocol v3

Downloads emails to a local device and deletes them from the server

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22
Q

What port does POP3 use

A

TCP 110

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23
Q

What is NTP

A

Network Time Protocol

An internet protocol used to synchronize with computer clock time sources in a network

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24
Q

What port does NTP use

A

TCP 123

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25
Q

What is NBNS

A

NetBIOS Name Service

NBNS serves much the same purpose as DNS does: translate human-readable names to IP addresses. NBNS’s services are more limited, in that NetBIOS names exist in a flat name space, rather than DNS’s hierarchical one (multiple flat name spaces can exist, by using NetBIOS scopes, but those are rarely used), and NBNS can only supply IPv4 addresses; NBNS doesn’t support IPv6.

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26
Q

What port does NBNS use

A

UDP/TCP 137

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27
Q

What is IMAP4

A

Internet Messaging Access Protocol

IMAP allows you to access your email wherever you are, from any device. When you read an email message using IMAP, you aren’t actually downloading or storing it on your computer; instead, you’re reading it from the email service.

28
Q

What port does IMAP4 use

29
Q

POP3 vs IMAP4

A

IMAP allows you to access your email wherever you are, from any device. When you read an email message using IMAP, you aren’t actually downloading or storing it on your computer; instead, you’re reading it from the email service. As a result, you can check your email from different devices, anywhere in the world: your phone, a computer, a friend’s computer.

POP works by contacting your email service and downloading all of your new messages from it. Once they are downloaded onto your PC or Mac, they are deleted from the email service. This means that after the email is downloaded, it can only be accessed using the same computer. If you try to access your email from a different device, the messages that have been previously downloaded won’t be available to you.

30
Q

What is SNMP

A

Simple Network Management Protocol

SNMP is used to collect data related to network changes or to determine the status of network-connected devices.

31
Q

What protocol does SNMP use

32
Q

What is IRC

A

Internet Relay Chat

Text-based chat system for instant messaging. Includes file sharing

33
Q

What port does IRC use

A

TCP/UDP 194

34
Q

What is HTTPS

A

Hypertext Transfer Protocol Secure

Secure’s HTTP traffic using SSL/TLC

35
Q

What port does HTTPS use

36
Q

What is SSL

A

Secure Sockets Layer

standard technology for securing an internet connection by encrypting data sent between a website and a browser (or between two servers)

37
Q

What port does SSL use

38
Q

What is RIP

A

Routing Information Protocol

Legacy routing protocol that is a distance vector protocol that uses hop count as its primary metric. RIP defines how routers should share information when moving traffic among an interconnected group of local area networks.

39
Q

What port does RIP use

40
Q

What is AOL IM

A

America On Line Instant Messenger

Discontinued chat service

41
Q

What port does AOL IM use

A

TCP/UDP 531

42
Q

What is RTSP

A

Real Time Streaming Protocol

RTSP is an application-level network communication system that transfers real-time data from multimedia to an endpoint device.

43
Q

What port does RTSP use

A

TCP/UDP 554

44
Q

Registered Ports

A

1024-49151

45
Q

Ephemeral/Dynamic Ports

A

49152-65535

46
Q

What is MS SQL

A

Microsoft SQL (Structured Query language)

47
Q

What port does MS SQL use

48
Q

What is Radius

A

Remote Authentication Dial-In User Service

is a networking protocol that provides centralized authentication, authorization, and accounting (AAA) management for users who connect and use a network service.

49
Q

What port does RADIUS use

A

TCP/UDP 1812

50
Q

What is Cisco CSSP (VoIP)

A

Cisco Skinny Call Control Protocol

51
Q

What port does Cisco CSSP use

52
Q

What is RTP

A

Real-Time Transport Protocol

is a network communication protocol developed on the User Datagram Protocol (UDP), which helps transport audio, video, and media traffic in real-time while minimizing jitter and packet loss.

53
Q

What port does RTP use

54
Q

What is SIP

A

Session Initiation Protocol

is a signaling protocol used to establish, manage, and terminate multimedia sessions, such as voice calls, video conferences, and instant messaging. It is widely used in telecommunications networks, including VoIP (Voice over IP) and video conferencing systems.

55
Q

What port does SIP use

56
Q

What is PPTP

A

Point to Point Tunneling Protocol

facilitates the private transfer of data from a remote client to a server by encapsulating packets at a TCP/IP level. Despite its role in early VPN development, PPTP has been largely superseded by more secure protocols because of its known vulnerabilities and weak encryption standards.

57
Q

What port does PPTP use

58
Q

What is SSTP

A

Secure Socket Tunneling Protocol

SSTP is used for secure connections, and the technology behind it leverages SSL/TLS handshakes. It uses the same port as SSL/TLS (port 443), and it bases the connection on user authentication instead of a device. It’s popular with internet connections that must have improved security over basic SSL/TLS connections. It’s often compared to the OpenVPN standard, which is considered the gold standard in encryption libraries.

59
Q

What port does SSTP use

60
Q

What is L2TP

A

Layer 2 Tunneling Protocol

OUTDATED

is a virtual private network (VPN) protocol that creates a connection between your device and a VPN server without encrypting your content. Due to its lack of encryption and authentication, L2TP is usually paired with Internet Protocol Security (IPsec) protocol. IPsec uses encryption algorithms and cryptographic keys to provide L2TP with the necessary encryption. IPsec also controls data that travels between the endpoints of the created connection tunnel between the end user and a VPN server online.

61
Q

What port does L2TP use

A

UDP 500
UDP 4500
UDP 1701

62
Q

What is SFTP

A

Secure File Transfer Protocol

SFTP transfers files using Secure Shell (SSH), which is an encrypted protocol.

63
Q

What port does SFTP use?

A

TCP 22 (uses SSH)

64
Q

What is LLMNR

A

Link-Local Multicast Name Resolution

Allows devices on the same LAN to resolve hostnames to IP addresses without a DNS server.

65
Q

What port does LLMNR use?

Networking (3 decks)

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