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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

SECOND SEMESTER M.TECH DEGREE EXAMINATION , APRIL/MAY 20 1 8

Branch.- Computer Science and Engineering
Stream(s): Computer Science and Engineering

Course Code & Name:

01056106: Advanced Computer Networks

Answer any two full questions from each part.
Limit answers to the required points.

Max. Marks: 60 Duration: 3 hours
PARTA

1. a. Suppose that an IP address of a host of a subnet is 198.65.12.67, with mask value 5
255.255.255.240; determine the subnet and the number of hosts the subnet contain.

b. Which of the addresses provided here cannot be used as [P addresses of netveork 4 interfaces for
Internet hosts? For addresses that do not contain syntax error, determine the class: A, B, C, D,
or E.
127.0.0.1
201.13. 1 23.245
226.4.37.105
५. 161.23.45.305
De a. Which OSI layer is responsible for the fonowing? 3
(i) Determining the best path to route packets.
(ii) Providing end-to-end communications with reliable service.
(iii) Providing node-to-node communications with reliable service

ற்‌. Why NAT? Describe different types of NATs. 6

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3. Using the network in the figure overleaf, give the virtual circuit tables for all switches after 9 each
of the following connections is established. E connected to J
C connected to F
A connected to B
D connected to G
H connected to J
Assume that the connections are cumulative: connection E to J is still up when connection
C to F is established, and so on. Assume that the VCI assignment always selects the lowest
unused VCI on each link, starting with 0. The ports ofthe switches are all numbered on the
Figure.