Common Ports Flashcards

1
Q

What is Telnet?

A

Telecommunication Network

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2
Q

What port is Telnet?

A

tcp/23

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3
Q

What does Telnet do?

A

Login to devices
Console Access
In-the-clear communication

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4
Q

Why is Telnet not the best choice for production systems?

A

Your data is not encrypted (it butt naked)

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5
Q

What does SSH stand for?

A

Secure Shell

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6
Q

What port is SSH?

A

tcp/22

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7
Q

What does SSH do?

A

Encryption communication link

Looks and acts just as Telnet

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8
Q

What does DNS stand for?

A

Domain Name System

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9
Q

What does DNS do?

A

Converts names to IP addresses

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10
Q

What port is DNS?

A

udp/53

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11
Q

What does SMTP stand for?

A

Simple Mail Transfer Protocol

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12
Q

What does SMTP do?

A

Sever to server email transfer

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13
Q

What does SFTP stand for?

A

Secure File Transfer Protocol

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14
Q

What does SFTP use?

A

Uses the SSHFTP

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15
Q

What does SFTP do?

A

Provides file system functionality- resumes interrupted transfers, directory listings, remote file removal.
Encrypted Communication- using SSH

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16
Q

What port is SFTP?

A

tcp/22

17
Q

What does FTP stand for?

A

File Transport Protocol

18
Q

What port is FTP?

A

tcp/20

19
Q

What does FTP do?

A

Transfers files between systems
Authenticates with a username and password
Full-featured functionality (list, add, delet, etc.)

20
Q

What does TFTP stand for?

A

Trivial File Transfer Protocol

21
Q

What port is TFTP?

A

udp/69

22
Q

What does TFTP do?

A

Very simple file transfer application- read and write files

No authentication- not used on production systems

23
Q

What does DHCP stand for?

A

Dynamic Host Configuration Protocol

24
Q

What ports are DHCP?

A

udp/67, udp/68

25
Q

What does DHCP do?

A

Automated configuration of IP address, subnet, ask, and other options.

26
Q

What requires a DHCP server?

A

Service, appliance, integrated into a SOHO router, etc..

27
Q

What does Dynamic/Pooled mean?

A

IP addresses are assigned in real-time from a pool.

Each system is given a lease and must renew at set intervals.

28
Q

What is DHCP Reservation?

A

Addresses are assigned by MAC address in the DHCP server.

Quickly manage addresses from one location.

29
Q

What does HTTP stand for?

A

Hypertext Transfer Protocol

30
Q

What does HTTPS stand for?

A

Hypertext Transfer Protocol Secure

31
Q

What does HTTP do?

A

Communication in the browser and by other applications.

In the clear or encrypted- supported by nearly all web servers and clients.

32
Q

What port is HTTP?

A

tcp/80

33
Q

What port is HTTPS?

A

tcp/443

34
Q

What does SNMP stand for?

A

Simple Network Management Protocol

35
Q

What port is SNMP?

A

udp/161

36
Q

What is V1 of SNMP?

A

The Original

  • Structured tables
  • In-the-clear
37
Q

What is V2 of SNMP?

A

A good step ahead

  • Data type enhancements
  • Bulk transfers
  • Still in-the-clear
38
Q

What is V3 of SNMP

A

A secure standard

  • Message Integrity
  • Authentication
  • Encryption