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Net+ > Common Ports > Flashcards

Common Ports Flashcards

1
Q

Telnet - telecommunications network

  • login to devices remotely
  • console access
  • not encrypted/in the clear communication
A

TCP port 23

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2
Q

SSH - secure shell

  • login to device remotely
  • Console access
  • encrypted communication
A

TCP port 22

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3
Q

DNS - domain name system

•converts host names to IP addresses

A

UDP port 53

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4
Q

SMTP -simple mail transfer protocol

  • server to server email transfer
  • also used to send mail from a device to a mail server
A

TCP port 25

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5
Q

SFTP - secure file transfer protocol

  • uses SSH for file transfers
  • provides file system functionality
  • encrypted communication
A

TCP port 22

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6
Q

FTP - file transfer protocol

  • transfers files between systems
  • authenticates with username and password
  • full featured functionality
A

TCP port 20 for active mode data and TCP port 21 for control

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7
Q

TFTP - trivial file transfer protocol

  • very simple file transfers
  • no authentication
A

UDP port 69

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8
Q

DHCP - dynamic host configuration protocol

  • IP addressing automation
  • can be external DHCP server, or built into router
A

UDP port 67 and 68

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9
Q

HTTP - hyper text transfer protocol

  • web browser communication
  • not encrypted
A

TCP port 80

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10
Q

HTTPS - hyper text transfer protocol secure

  • web server communication
  • encrypted
A

TCP port 443

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11
Q

SNMP - simple network management protocol

  • gathers statistics from network devices
  • current version is v3.
A

UDP port 161

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12
Q

RDP - Remote Desktop protocol

  • remote access to other desktops
  • can connect to entire desktop or a single application
  • clients for many different operating systems
A

TCP port 3389

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13
Q

NTP - network time protocol

•network time syncing across all devices

A

UDP port 123

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14
Q

SIP - session initiation protocol

  • setup and manage VoIP sessions
  • extend voice communication
A

TCP ports 5060 and 5061

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15
Q

SMB - server message block

•used by Microsoft for file and printer sharing

A

TCP port 445

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16
Q

POP3 - post office protocol 3

•basic mail transfer

A

TCP port 110

17
Q

IMAP4 - internet message access protocol 4

  • receive emails from email server
  • current mail protocol
A

TCP port 143

18
Q

LDAP - lightweight directory access protocol

A

TCP port 389

19
Q

LDAPS - lightweight directory access protocol secure

A

TCP port 636

20
Q

H.323

A

TCP port 1720

21
Q

RTP - real time transport protocol

A

TCP/UDP ports 5004/5005

Net+ (6 decks)

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