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Information technology > Ports and functions > Flashcards

Ports and functions Flashcards

1
Q

What are the 2 groups of ports and what are their ranges?

A
  • “Well known and reserved”(0-1023)- standard ports

- Epehemeral Ports (Ports 1024-65,535)-Temporary Ports

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2
Q

What range do ports range from?

A

0-65,535

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3
Q

What is FTP, FTP’s function and port numbers? (2 Port #s)

A

File Transfer Protocol (Ports 20,21)
Transfers computer files between a client and server on a computer network. This is an unsecure method and data is being transferred in the clear. ( no encryption)
-Not used for anything confidential on encrypted

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4
Q

What is SSH, SSH’s function and port number?

A

Secure Shell (SSH)- Port 22- Cryptographic network protocol for operating network services securely over an unsecured network and is best known for remote login to computer systems by users.

  • Safe to use over unsecured network
  • Encryption on both ends
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5
Q

What is SFTP, SFTP’s function and port #?

A

SSH File Transfer Protocol (SFTP)-Port 22- Provides file access, file transfer, and file management over any reliable data stream.

  • Secure version of FTP
  • Uses the FTP protocol through the SSH tunnel that we created to securely transfer files
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6
Q

What is TELNET, TELNET’s function, and port #?

A

Telnet- Port 23- Provides bidirectional interactive text-oriented communication facility using a virtual terminal connection. Similar to SSH, but insecure.

  • version of remote access with no security
  • Doesn’t use encryption/UNSECURE
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7
Q

What is SMTP, SMTPs function and port#?

A

Simple Mail Transfer Protocol (SMTP)-Port 25- Internet standard for sending electronic mail

-Sending mail out over port 25

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8
Q

What is DNS, DNS function, and Port #?

A

Domain Name Service (DNS)-Port 53- Hierarchical, decentralized naming system for computers, services, or other resources connected to the Internet or a private network. It converts domain names to IP addresses.

192.168.1.12->www.google.com

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9
Q

What is DHCP, DHCPs function and port#? (2 Ports)

A

Dynamic Host Control Protocol (DHCP)-Port 67, 68- Dynamically assigns an IP address and other network configuration parameters to a client and enables computers to request IP addresses and networking parameters automatically.

-automatically assigns computer IPs over ports 67, 68

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10
Q

What is TFTP, TFTPs function and port#?

A

Trivial File Transfer Protocol (TFTP)-Port 69- Transmits files in both directions of a client-server application and is used for booting an operating system from a local area network file server

  • doesn’t provide and authentication or directory visibility
  • Stripped down version of FTP
  • used in sending or requesting configuration files from a router or switch, or booting an OS off of network drive
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11
Q

What is HTTP, HTTPs function and port#?

A

Hypertext Transfer Protocol (HTTP)-Port 80- Foundation of data communication for the world wide web that is designed for distributed, collaborative, and hypermedia presentation across many devices

-Unsecured web browsing

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12
Q

What is POP3, POP3s function and port #?

A

Post Office Protocol v3 (POP3)-Port 110- used by email clients to retrieve emails from a remote server over TCP/IP connection

-downloading email from server

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13
Q

What is NTP, NTPs function and port#?

A

Network Time Protocol (NTP)-Port 123- Provides clock synchronization between computer systems over packet-switched, variable-latency data networks

  • NTP port 123
  • Send out time over network
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14
Q

What is NetBIOS, NetBIOSs function and port #?

A

NetBIOS-Port 139- Network Basic Input/Output System. Provides services allowing applications on separate computers to communicate over a local area network for file and printer sharing

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15
Q

What is IMAP, IMAPs function and port#?

A

Internet Mail Application Protocol (IMAP)-Port 143- Allows email clients to retrieve email messages from a mail server over a TCP/IP connection and allows the end user to view and manipulate the messages as if they’re stored locally

  • Different from POP3 because it keeps all devices synchronized
    (ex: on POP3 if i viewed mail on one device, one device would show read and the other would show unread)
  • On IMAP all devices would show message read
  • Much better for modern email communciation
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16
Q

What protocols do you receive emails on?

What protocol do you sending emails on?

A

Receive- POP3(port 110) and IMAP(Port 143)

Send- SMTP(Port 25)

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17
Q

What is SNMP, SNMPs function and port #?

A

Simple Network Management Protocol (SNMP)-Port 161- Provides collection and organization of information about managed devices on IP networks

-used on routers and switches

18
Q

What is LDAP, LDAPs function and port#?

A

Lightweight Directory Access Protocol (LDAP)-Port 389- Open, vendor-neutral, industry and standard for accessing and maintaining distributed directory information service

  • LDAP and Active Directory both use Port 389
  • An Example of using LDAP is looking up a contact in the directory of MS Outlook
19
Q

What is HTTPS, HTTPSs function and port#?

A

HTTP Secure (HTTPS)-Port 443- Foundation of ecommerce on the world wide web that is designed for adding security to the insecure HTTP protocol.

-HTTPS uses either TLS or SSL to encrypt your connection to allow for ecommerce, and logging in with username and password

20
Q

What is SMB, SMBs function and port#? What other protocol does SMB operate in conjunction with?

A

Server Message Block (SMB)-Port 445-Provides shared access to files, printers, and miscellaneous communications between devices on a network

  • operates a lot like NetBIOS(Port 139) and operates in conjunction with NetBios to perform file transfer
  • NetBIOS focuses on authentication and SMB passes out files
  • Port 139 and 445 are usually open and working together
21
Q

What is LDAPS, LDAPSs function and port #?

A

LDAP Secure (LDAPS)- Port 636- open, vendor-neutral, industry standard for accessing and maintaining distributed directory information services

  • operates like LDAP
  • uses active directory structure
  • adds layer of TLS or SSL to secure information
22
Q

What is RDP, RDPs function and port#?

A

Remote Desktop Protocol (RDP)-Port 3389- Proprietary protocol developed by MicroSoft which provides a user with a graphical interface to connect to another computer over a network connection

-different from SSH or Telnet because of how the interface looks

23
Q

What is SIP, SIPs function and port #s? (2 ports)

A

Session Initiation Protocol (SIP)-Port 5060, 5061- Provides signaling and controlling multimedia communication sessions in applications

-SIP is used for VoIP, phone calls, voices calls, skype,etc..

24
Q

Port 22 (2 answers)

A

SSH, SFTP

25
Q

Ports 20,21

A

FTP

26
Q

Port 23

A

Telnet

27
Q

Port 25

A

SNMP

28
Q

Port 53

A

DNS

29
Q

Ports 67,68

A

DHCP

30
Q

Port 69

A

TFTP

31
Q

Port 80

A

HTTP

32
Q

Port 110

A

POP3

33
Q

Port 123

A

NTP

34
Q

Port 139

A

NetBIOS

35
Q

Port 143

A

IMAP

36
Q

Port 161

A

SNMP

37
Q

Port 389

A

LDAP

38
Q

Port 443

A

HTTPS

39
Q

Port 445

A

SMB

40
Q

Port 636

A

LDAPS

41
Q

Port 3389

A

RDP

42
Q

Ports 5060, 5061

A

SIP

Information technology (3 decks)

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