Question 12 what is the default mask for a class b

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Question 12 What is the default mask for a class B address in CIDR notation? Question 13 Which field in the IPV6 base header restricts the lifetime of a datagram? Question 14 The following is an abbreviated IPv6 address: FD80:3:A7A::20:0:3E write the full (expanded) address of this abbreviate d IPv6 address.
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Term 3 Standard Examination 2017 COIT20261 — Network Routing and Switching Page 4 of 6 PART B 15 MARKS PRACTICAL PROBLEMS Answer ALL questions from this part. Write your answers in the Examination Answer Booklet. Show your calculations. Formula from Forouzan Total number of addresses granted N,The prefix length is n, The assigned number of addresses to each subnetwork is Ni, To calculate the number of addresses N in a block: N= N=2 32-n To calculate the prefix length of the each subnet ni= n + Log2 (N/Ni) To calculate first addresses: AND the mask with the given address To calculate last addresses: OR the complement of the mask with the given address Question 1 4 Marks An organisation has been allocated the following block of classless addresses by its ISP: 137.77.217.6/28 Identify the addresses in this range that would be used as the network address, those that can be used by network hosts, and the direct broadcast address. Question 2 4 Marks A company has been granted a block of addresses which starts at 200.100.20.0/23. Create the following 8 subnets for this company by calculating the subnet address for each subnet. (a) 2 subnets with 64 addresses each (b) 4 subnets with 32 addresses each (c) 2 subnets with 16 addresses each Question 3 2 Marks The following is an ICMPv6 message fragment with its header (in hexadecimal): 01 04 B1 B5 00 00 00 00 00 00 00 00 00 ... Identify the information that is carried in the header, and state their values. What type of ICMPv6 message is this? What is the message?
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Term 3 Standard Examination 2017 COIT20261 — Network Routing and Switching Page 5 of 6 Question 4 5 Marks The figure below shows the configuration of a hypothetical section of the Internet.
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