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Flashcards in Networking Ports Deck (18)
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1

20, 21

FTP

File Transfer Protocol

Sends and receives files between systems

 

2

22

SSH

Secure Shell

Encrypted console access

3

23

TELNET

Telecommunication Network

Insecure console access

4

25

SMTP

Simple Mail Transfer Protocol

Transfer email between mail services

5

53

DNS

Domain Name System

Convert domain names to IP addresses

6

80

HTTP

Hypertext Transfer Protocol

Web server communicaCon

7

110

POP3

Post Office Protocol 

Web server communication with encryption

8

143

IMAP4

Internet Message Access Protocol

Includes management of email inbox from multiple clients;

 Newer email client protocol

9

443

HTTPS

Hypertext Transfer Protocol Secure

Web server communication with encryption.

10

3389

RDP

Remote Desktop Protocol 

Share a desktop from a remote location​

11

137-139

NetBIOS

Network Basic Input/Output System

  • Register, remove, and find windows services by name (137)
  • Windows connectionless data transfer (138)
  • Windows connection-oriented data transfer(139)

12

445

SMB

Server Message Block

Windows file transfer and printer sharing

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CIFS 

Common Internet File System

CIFS is a network file service protocol developed by Microsoft. It is used in conjunction with TCP/IP to facilitate file sharing across multiple platforms for a large number of simultaneous users.

13

427

SLP

Service Location Protocol 

Find Mac OS services by name

14

548

AFP

Apple Filing Protocol 

Mac Os File transfers 

 

In macOS, AFP is one of several file services supported, with others including Server Message Block (SMB), Network File System (NFS), File Transfer Protocol (FTP), and WebDAV.

15

67 & 68

DHCP

Dynamic Host Configuration Protocol

 

DHCP is a protocol used to assign an IP address to a computer or device connected to a network automatically. 

  • If the network has a firewall, ports 67 and 68 need to be open for devices to function properly.

16

389

LDAP

Lightweight Directory Access Protocol

Directory service;

LDAP is an Internet protocol that runs over TCP.
Most e-mail clients today and in the future contain this protocol or OpenLDAP.

17

161 &162

SNMP

Simple Network Management Protocol

 

Gather statistics from network devices

18

UDP

UDP

User Datagram Protocol 

UDP is an alternative protocol to the TCP/IP that runs on top of IP and is sometimes referred to as UDP/IP.

Unlike TCP/IP, UDP does not divide each transmission into packets, which allows for a faster transmission. However, UDP does not provide error checking.