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Network + > Ports > Flashcards

Ports Flashcards

1
Q

SSH - secure shell

A
  • Encrypted communication link - tcp/22

* Looks and acts the same as Telnet

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2
Q

DNS - Domain Name System

A

Converts names to IP addresses - udp/53

• www.professormesser.com = 162.159.246.164

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3
Q

SMTP - Simple Mail Transfer Protocol

A

SMTP - Simple Mail Transfer Protocol
• Server to server email transfer - tcp/25

Also used to send mail from a device to a mail server
• Commonly configured on mobile devices
and email clients
• Other protocols are used for clients to receive email
• IMAP, POP3

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4
Q

SFTP - Secure FTP

A

• Uses the SSH File Transfer Protocol - tcp/22

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5
Q

FTP – File Transfer Protocol

A

tcp/20 (active mode data), tcp/21 (control)
• Transfers files between systems
• Authenticates with a username and password

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6
Q

TFTP – Trivial File Transfer Protocol

A

udp/69
• Very simple file transfer application
• Read files and write files
• No authentication - Not used on production systems

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7
Q

Telnet

A

Telnet – Telecommunication Network - tcp/23
• Login to devices remotely
• Console access
• In-the-clear communication

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8
Q

DHCP - Dynamic Host Configuration Protocol

A

Automated configuration of IP address,
subnet mask and other options
• udp/67, udp/68 - Requires a DHCP server

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9
Q

HTTP

A

80

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10
Q

HTTPS

A

443

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11
Q

SNMP - Simple Network Management Protocol

A

Gather statistics from network devices

• udp/161

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12
Q

RDP - Remote Desktop Protocol

A

Share a desktop from a remote location over tcp/3389

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13
Q

NTP - Network Time Protocol

A

Switches, routers, firewalls, servers, workstations
• Every device has its own clock - udp/123

Synchronizing the clocks becomes critical
• Log files, authentication information, outage details

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14
Q

SIP - Session Initiation Protocol

A

Voice over IP (VoIP) signaling

• tcp/5060 and tcp/5061

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15
Q

SMB - Server Message Block

A

Protocol used by Microsoft Windows
• File sharing, printer sharing
• Also called CIFS (Common Internet File System)
• Direct over tcp/445 (NetBIOS-less)

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16
Q

POP3

A
  • Post office Protocol version 3 - tcp/110

• Basic mail transfer functionality

17
Q

IMAP4

A

Internet Message Access Protocol v4 - tcp/143

• Manage email inbox from multiple clients

18
Q

LDAP

A

LDAP (Lightweight Directory Access Protocol) - tcp/389

• Store and retrieve information in a network directory

19
Q

• LDAPS (LDAP Secure)

A

tcp/636

• A non-standard implementation of LDAP over SSL

20
Q

H.323

A
  • Voice over IP (VoIP) signaling - tcp/1720
  • ITU Telecommunication H.32x protocol series
  • Setup and manage VoIP sessions
  • Call, ring, hang up

Network + (4 decks)

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