Tag Archives: protocols

Ports and Protocols Quiz for Network+

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In celebration of my latest upcoming CompTIA Network+ Certification Guide – it is time for a ports and protocols quiz!

Ports and Protocols Quiz for CompTIA Network+

Enjoy this quiz covering some of the ports and protocols that you should know for the CompTIA Network+ exam.

1 / 11

What is the port number used by HTTPS?

2 / 11

What is the port number used by NTP?

3 / 11

What is the port number used by SSH?

4 / 11

What is the port number used by Secure FTP (SFTP)?

5 / 11

What is the port number used by DNS?

6 / 11

What is the port number used by TFTP?

7 / 11

What is the port number used by DHCP?

8 / 11

What is the port number used by syslog?

9 / 11

What protocol does DNS use in its operation?

10 / 11

What protocol does NTP use in its operation?

11 / 11

What protocol does SSH use in its operation?

Your score is

The average score is 80%

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An Introduction to EIGRP

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About the Protocol

  • The algorithm used for this advanced Distance Vector protocol is the Diffusing Update Algorithm.
  • The metric is based upon Bandwidth and Delay values. Reliability and Load could also be used, but are not by default. The MTU is used as a tiebreaker and is not used in the metric formula.
  • For updates, EIGRP uses Update and Query packets that are sent to a multicast address. The Reliable Transfer Protocol used by EIGRP will start unicasting updates in the event that several multicast attempts are not acknowledged.
  • Split horizon and DUAL form the basis of loop prevention for EIGRP.
  • EIGRP is a classless routing protocol that is capable of Variable Length Subnet Masking.
  • Automatic summarization is on by default, but summarization and filtering can be accomplished anywhere inside the network. This is changed in 15.X IOS code where automatic summarization is disabled by default.

Continue reading An Introduction to EIGRP →