DNS/Telnet/SSH/Port Numbers

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18 Terms

1
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What is DNS?

  • Domain Name System

  • IP address and preferred name translation

2
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What is the Name Space?

  • all preferred name addresses must be unique

  • namespace is used to map each address

3
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What is Name-Address Resolution?

  • the mapping of a name to an address

4
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What is TELNET?

  • Terminal Network

  • the standard TCP/IP protocol for virtual terminal service

5
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What does TELNET allow for?

  • a user to connect to a remote computer so that their local device functions as though it were directly opeating a terminal on that remote system

6
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What is SSH?

  • Secure Shell

  • Uses TCP as the underlying transport protocol

7
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Which is more secure, TELNET or SSH?

  • SSH

8
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9
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10
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What port is FTP?

  • 20-21

  • TCP

11
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What port is TELNET?

  • 23

  • TCP

12
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What port is SMTP?

  • 25

  • TCP

13
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What port is DNS?

  • 53

  • Both UDP & TCP

14
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What port is DHCP?

  • 67

  • Both UDP & TCP

15
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What port is TFTP?

  • 69

  • UDP

16
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What port is HTTP?

  • 80

  • TCP

17
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What port is NTP?

  • 123

  • Both UDP & TCP

18
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What port is SNMP?

  • 161-162

  • Both UDP & TCP