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Network+ > Common Ports > Flashcards

Common Ports Flashcards

1
Q

Telnet

A

TCP 23

Allows one to login to devices remotely via an unencrypted connection.

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2
Q

SSH

A

TCP 22

Allows one to login to devices remotely via an encrypted connection.

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3
Q

DNS

A

UDP 53
TCP 53 (for large data)

Resolves domain names to IP addresses.

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4
Q

SMTP

A

TCP 25 (plaintext)
TCP 587 (TLS encryption)

Server to server email transfer. Also used to send mail from a device to a server.

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5
Q

POP3

A

TCP 110 (plaintext)
TCP 995 (TLS encryption)

Receive emails from an email server.

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6
Q

IMAP4

A

TCP 143 (plaintext)
TCP 993 (TLS)

Similar to POP3 but allows for management of email inbox from multiple clients.

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7
Q

SFTP

A

TCP 22

File transfer via SSH. Provides file system functionality.

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8
Q

FTP

A

TCP 20 (data channel)
TCP 21 (control channel)

Transfer files across systems. FTP has authentication and file system management.

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9
Q

TFTP

A

UDP 69

Very simple file transfer. Read/write files. Not used on production systems.

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10
Q

DHCP

A

UDP 67 (server)
UDP 68 (client)

Automatic configuration of IP address, subnet mask, default gateway and more.

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11
Q

HTTP

A

TCP 80

Communication with web server.

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12
Q

HTTPS

A

TCP 443

Web server communication with encryption. (Over SSL or TLS)

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13
Q

SNMP

A

UDP 161
UDP 162 (alerts/SNMP traps)

Gather statistics from network devices. (network management)

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14
Q

Syslog

A

UDP 514

Used to collect log data from multiple network devices.

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15
Q

RDP

A

TCP 3389

Share desktop from a remote location.

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16
Q

NTP

A

UDP 123

Allow every network device to synchronize clocks.

17
Q

SIP

A

TCP 5060
TCP 5061

Session initiation protocol used to setup and manage VoIP sessions.

18
Q

SMB

A

TCP 445

Windows protocol for file sharing/printer sharing.

19
Q

LDAP

A

TCP 389

Store and retrieve information in a network directory.

20
Q

LDAPS

A

TCP 636

Secure version of LDAP over SSL.

21
Q

MS-SQL

A

TCP 1433

Port commonly used for Microsoft SQL Server.

22
Q

Oracle SQL/Net 8

A

TCP 1521

Port commonly used for Oracle Database.

23
Q

MySQL

A

TCP 3306

Port commonly used for MySQL Database.

Network+ (3 decks)

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