Shared Flashcard Set

Details

Common Ports to Remember
Network + Commonly used ports
19
Computer Networking
Graduate
01/23/2017

Additional Computer Networking Flashcards

 


 

Cards

Term

 

 

 

 

Port 20

 

Definition

 


File Transfer Protocol

 

data transfer


(FTP Publishing Service provides FTP connectivity)

 

Term



Port 21

Definition

 




File Transfer Protocol

control (command)



 

(By default, the FTP control port is 21)

Term



Port 22

Definition


SSH/SCP


The Secure Shell (SSH) Protocol

 

used for secure logins, file transfers (scp, sftp) and port forwarding

 



a cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked computers

 

Term



Port 23

Definition

 


Telnet



(unencrypted text communications)

 

The Telnet system service for Windows provides ASCII terminal sessions to Telnet clients.

Term



Port 25

Definition

 

(SMTP)

Simple Mail Transfer Protocol


         Used for e-mail routing between mail servers


Simple Mail Transfer Protocol (SMTP) system service is an email

        submission and relay agent. It accepts and queues email messages

                   for remote destinations, and it retries at set intervals



        

Term



Port 53

Definition

 


(DNS)

Domain Name Server

Domain Name System (DNS)

 

 

DNS Server service enables DNS name resolution by answering queries and update requests for DNS names. DNS servers are required to locate devices and services that are identified by using DNS names and to locate domain controllers in Active Directory

 

Term



Port 67

Definition

 



DHCP/BOOTP



Dynamic Host Configuration Protocol

Bootstrap Protocol Server


 

The DHCP Server service uses the Dynamic Host Configuration Protocol (DHCP) to automatically allocate IP addresses.

 


Term

 

 

 

Port 68


Definition

 

 

 

DHCP/BOOTP


 

An IP/UDP bootstrap protocol (BOOTP) which allows

a diskless client machine to discover its own IP address, the address

of a server host, and the name of a file to be loaded into memory and

executed.

Term



Port 80

Definition


HTTP

 

Hypertext Transfer Protocol


 

This is the primary port used by the world wide web (www) system. Web servers open this port then listen for incoming connections from web browsers. Similarly, when a web browser is given a remote address (like grc.com or amazon.com), it assumes that a remote web server will be listening for connections on port 80 at that location

Term



Port 110

Definition

 

POP3

 

Post Office Protocol - Version 3


Pop3 "post office protocol" is used by eMail clients for the retrieval of their eMail from designated eMail "post office" servers. Email Clients such as Microsoft Outlook, Netscape, Eudora, and many others, connect to port 110 of a remote eMail server, then use the pop3 protocol to retrieve their eMail. They first identify and authenticate themselves by logging on to the remote eMail server using their eMail account information. After doing so they are permitted to view and download their waiting eMail.

Term



Port 123

Definition


NTP

 

Network Time Protocol

used for time synchronization

 

The network time protocol is a clean, simple, lightweight, and efficient protocol allowing clients to query servers for the current time

(including the date). The only glitch is that the 64-bit NTP time value will overflow (suddenly go back to zero) in early February (the 6th or 7th, no one seems to be sure which) in the year 2036. I plan to be relaxing on a beach somewhere on that day

Term



Port 143

Definition

 

IMAP

Internet Message Access Protocol

management of email messages


 

Imap protocol is used by eMail clients for the retrieval of their eMail from designated eMail "post office" servers. Email Clients such as Microsoft Outlook, Netscape, Eudora, and many others, using imap protocol to retrieve their eMail, connect to port 143 of a remote eMail server. They must then identify and authenticate themselves by logging on to the remote eMail server using their eMail account information. After doing so they are permitted to view and download their waiting eMail

Term



Port 443

Definition

 

HTTPS

Hypertext Transfer Protocol

over TLS/SSL (HTTPS)


 

The HTTP SSL system service enables IIS to perform SSL functions. SSL is an open standard for establishing an encrypted communications channel to help prevent the interception of extremely important information, such as credit card numbers

Term



Port 3389

Definition

 

Terminal Server


 

Microsoft Terminal Server (RDP) officially registered as Windows Based Terminal (WBT)

 

Terminal Services provides a multi-session environment that enables client devices to access a virtual Windows desktop session and Windows-based programs that are running on the server. Terminal Services enables multiple users to be connected interactively to a computer.

Term



Port 161

Definition

 

 

 

SNMP

Simple Network Management Protocol

Term



Port 194

Definition

 

 

IRC

Internet Relay Chat

Term

 




Port 443

Definition

 

HTTPS

 

HTTP Secure

 

 

 

Term

 



Port 465

Definition

 

 

SMTPS

 

SMTP Secure

Term



Port 520

Definition

 

 

RIP

 

Routing Information Protocol

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