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NA Q1)	Sketch the Private and hybrid Network in achieving privacy in network.

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NA Q1)	Sketch the Private and hybrid Network in achieving privacy in network.

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NA-Q3)	Discuss the relationship of Domain Name System (DNS) and Network Address Translation (NAT)

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NA-Q3)	Discuss the relationship of Domain Name System (DNS) and Network Address Translation (NAT)

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Scenario 1:
To  provide a certain IP address to be public and a certain address to be private. So the private address can be access via a login page or a NAT.
Scenario 2:
An example of a scenario between two intranet via an internet. Access are only allow via VPN. NAT will be need to translate the IP address at the gateway of the intranet.
Scenario 3:
DNS is a server that translate IP address to URL however if the DNS sits behind the NAT, access cannot be done. A mechanism of integration of NAT with DNS need to be done if the URL sits behind NAT.

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NA-Q2)	Provide a drawback of these networks and how to solve the problem

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NA-Q2)	Provide a drawback of these networks and how to solve the problem

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Drawback:
-network complexity in terms of maintainance
-costly
-isolation of network from the global internet
Solve:
Virtual Private Network

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IPv6-Q4)	Why do we need to up grade IPv4 to IPv6. In your opinion does IPv6 making thing better or worst. Discuss.

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IPv6-Q4)	Why do we need to up grade IPv4 to IPv6. In your opinion does IPv6 making thing better or worst. Discuss.

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Better:
-IPv6 provide the substantially larger Ip address than Ipv4.
-Redundancy of the unused timestamp is a waste of bandwidth
-Better handle congestion and router discovery, i.e Fragmentation is done at the source.
-Support for resource allocation.
Worst:
-The header is bigger.
-Latency and packet drop

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IPv6-Q3)	Sketch an IPv6 packet with Extension header, containing TCP segment. Includes also all types of extension header

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IPv6-Q3)	Sketch an IPv6 packet with Extension header, containing TCP segment. Includes also all types of extension header

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IPv6Q2)	Sender A, in network 1, needs to send an IPv6 packet to a compatible IPv6 receiver B in network 3 (see Figure 1). Can the B receive the packet? If not why and provide solution to the problem?

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IPv6Q2)	Sender A, in network 1, needs to send an IPv6 packet to a compatible IPv6 receiver B in network 3 (see Figure 1). Can the B receive the packet? If not why and provide solution to the problem?

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Using IPv6 fragmentation are done at the end system. The end system need to know the smallest MTU in the path the data will be sent. Then the data will be fragment with the smallest MTU.

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IPv6-Q1)	Compare the option in IPv4 and the extension header in IPv6

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IPv6-Q1)	Compare the option in IPv4 and the extension header in IPv6

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IPv4 Options header has Copy flat, option number and Option class. while IPv6 extension header has routing, fragment header, destination header.