Knowledge checks


What is the Internet Protocol?



What are the principal components of the IPv4 protocol (check all that apply)?




 

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1/11

The IPv4 header.



Match each of the following fields in the IP header with its description, function or use.



Question List:
Answer List:
  1. This field contains ECN and differentiated service bits.

  2. This field contains the IP protocol version number.

  3. This field contains the Internet checksum of this datagram's header fields.


  4. This field is used for datagram fragmentation/reassembly.

  5. This field contains the "protocol number" for the transport-layer protocol to which this datagram's payload will be demultiplexed - UDP or TCP, for example.

  6. This field contains a UDP or TCP segment, for example.

  7. This field indicates the total number of bytes in datagram.

  8. The value in this field is decremented at each router; when it reaches zero, the packet must be dropped. 


 

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2/11

What is an IP address actually associated with?



Which of the following statements is true regarding an IP address? (Zero, one or more of the following statements is true).




 

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3/11

What is a subnet?



What is meant by an IP subnet? (Check zero, one or more of the following characteristics of an IP subnet).




 

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4/11

Subnetting(a).



Consider the three subnets in the diagram below.

What is the maximum # of interfaces in the 223.1.2/24 network?




 

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5/11

Subnetting(b).



Consider the three subnets in the diagram below.

What is the maximum # of interfaces in the 223.1.3/29 network?




 

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6/11

Subnetting(c).



Consider the three subnets in the diagram below.

Which of the following addresses can not be used by an interface in the 223.1.3/29 network? Check all that apply.




 

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7/11

Plug-and-play.



What is meant by saying that DHCP is a "plug and play" protocol?




 

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8/11

DHCP request message. 



Which of the following statements about a DHCP request message are true (check all that are true). Hint: check out Figure 4.24 in the 7th and 8th edition of our textbook.





 

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9/11

IPv4 versus IPv6. 



Which of the following fields occur ONLY in the IPv6 datagram header (i.e., appear in the IPv6 header but not in the IPv4 header)?  Check all that apply.





 

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10/11

Purpose of DHCP. 



What is the purpose of the Dynamic Host Configuration Protocol?




 

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11/11

We gratefully acknowledge the programming and problem design work of John Broderick (UMass '21), which has really helped to substantially improve this site.

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