Dalhousie University Subnet a

1. Given a class C network address and the following subnet requirements:

a. Subnet A: must support 14 hosts

b. Subnet B: must support 28 hosts

c. Subnet C: must support 2 hosts

d. Subnet D: must support 10 hosts

e. Subnet E: must support 45 hosts

Draw the topology of the internetwork showing the main gateway router at the exit point of the internetwork,

routers at the exit point of each subnet, and each of these routers connecting to the main gateway router (similar to

the examples from the lectures). The above requirement does not include router interfaces, or the extra networks

created by router interconnections (that is, you have to add them and account for them).

Design the subnetting scheme using VLSM. You need to account for all the extra addresses required by the routers.

Show all steps. In the final solution table, indicate the subnet number, host ranges, broadcast address and mask for

each subnet. Also indicate the total number and ranges of free addresses.

2. Repeat the VLSM design problem for the following scenario:

Subnet A: 29 hosts Subnet B: 10 hosts

Subnet E

Subnet C: 45 hosts Subnet D: 7 hosts

The class C address allocated to the network is The router interfaces must also be assigned with

addresses – these are not included in the number of hosts given.

3. The following figure shows a network of routers running the link state routing algorithm. The numbers on the

links represent costs. Assume that R1 is directly connected to a network N1 with a cost of 0, R2 to N2, etc. Write

the link state database (topology information database) that will be stored in each router after flooding.

IPv6 (short snappers)

4. What is the original (unabbreviated) form of the following IPv6 addresses:

  • 0::0
  • 0:AA::0
  • 0:1234::3
  • 123::1:2
  • 5. Identify the type (such as provider-based unicast address, loopback reserved address, etc.) of each of the following

    IPv6 addresses:

  • 0::0
  • 0::FFFF:0:0
  • 582F:1234::2222
  • 4821::14:22
  • 6. An IPv6 packet consists of the base header and a TCP segment. The length of the payload is 320 bytes. The

    packet carries HTTP data. The flow label is 2342. The destination and source addresses are 582F:1234::2222 and

    4821::14:22, respectively. The hop limit is set to 64. Draw the base header and enter a value for each field in HEX

    in the base header. The source and destination IPv6 addresses must be written in the expanded form (unabbreviated).

    7. Write the mapped IPv6 address format of the IPv4 address in hexadecimal colon notation.

    8. Write the IPv6 loopback address in hexadecimal colon notation.

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