1. Net431:advanced net services
Networks and Communication Department
Tutorial 2

2. Question 1: How do you correctly compress the following ipv6 address:
a. 2340: lABC:119A:A000:0000:0000:0000:0000
b. 0000:00AA:0000:0000:0000:0000: 119A:A231
c. 2340:0000:0000:0000:0000: 119A:A001:0000
d. 0000:0000:0000:2340:0000:0000:0000:0000
e. 2001:0db8:0000:0000:0000:0000:0000:0c50
1-Jan-19
Networks and Communication Department

3. a. 2340:1ABC:119A:A000::0 or 2340:1abc:119a:a000:: b. 0:AA::119A:A231
d. 0:0:0:2340::0 or
0:0:0:2340:: e.
1-Jan-19
Networks and Communication Department

4. Question 2
Q5: Show the expand (unabbreviated) form of the following ipv6 addresses.
a. 0::0
b.0:AA::0
c. 0:1234::3
d. 123::1:2
1-Jan-19
Networks and Communication Department

5. A- 0000:0000:0000:0000:0000:0000:0000:0000
b. 0000:00AA:0000:0000:0000:0000:0000:0000
c. 0000:1234:0000:0000:0000:0000:0000:0003
d. 0123:0000:0000:0000:0000:0000:0001:0002
1-Jan-19
Networks and Communication Department

6. Q3:
What is the type of the following address? FE80::12? Link local address
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Networks and Communication Department

7. Q4: Compare and contrast the fields in the main headers of IPv4 and IPv6. Make a table that shows the presence or absence of each field.
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Networks and Communication Department

8. Q5:List three transition strategies to move from IPv4 to IPv6
Q5:List three transition strategies to move from IPv4 to IPv6. Explain the difference between tunneling and dual stack strategies during the transition period. When is each strategy used?
The three transition strategies are dual stack, tunneling, and header translation.
In tunneling the IPv6 packet is encapsulated in an IPv4 packet when it enters the region, and it leaves its capsule when it exits the region.
Tunneling is a strategy used when two computers using IPv6 want to communicate with each other and the packet must pass through a region that uses IPv4.
In header translation, the header format must be totally changed from IPv4 to IPv6.
Header translation is necessary when the majority of the Internet has moved to IPv6 but some systems still use IPv4.
1-Jan-19
Networks and Communication Department

9. Q6: What are the two protocols defined by IPSec
Q6: What are the two protocols defined by IPSec? Are both AH and ESP needed for IP security? Why or why not?
The two protocols defined by IPSec for exchanging datagrams are Authentication Header (AH) and Encapsulating Security Payload (ESP).
Either AH or ESP is needed for IP security. ESP, with greater functionality than AH, was developed after AH was already in use.
1-Jan-19
Networks and Communication Department

10. Q7: What is a VPN and why is it needed?
A VPN is a technology that allows an organization to use the global Internet yet safely maintain private internal communication.
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Networks and Communication Department

11. Q8: Draw a symmetric-key encryption/decryption between two devices to provide privacy?
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Networks and Communication Department

12. Q9: Draw an asymmetric-key encryption/decryption between two devices to provide privacy?
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Networks and Communication Department

13. Q&A
1-Jan-19
Networks and Communication Department