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Department of I.T. CN & Case Tools Lab Manual

COMPUTER NETWORKS AND CASETOOLS LAB

Objective:

To Under of various layers of OSI model

To inculcate object oriented software designSystem/ Soft!"e Re#$i"eme%t

Intel based desktop PCs L! CO!!"CT"# wit$

minimum of %&& '() or faster processor wit$ atleast

&* '+ ,' and %-- '+ free disk space

Tools Suc$ as ,ational ,ose

P!"t & A%. Implement t$e data link layer framing met$ods suc$ as

c$aracter/ c$aracter stuffing and bit stuffing.

0. Implement on a data set of c$aracters t$e t$ree C,C

polynomials 1 C,C %0/ C,C %&

and C,C CCIP.

2. Implement #ijkstra 3s algorit$m to compute t$e S$ortest

pat$ t$ru a grap$.*. Take an e4ample subnet grap$ wit$ weig$ts indicating

delay between nodes. !ow obtain ,outing table art eac$

node using distance vector routing algorit$m

5. Take an e4ample subnet of $osts . Obtain broadcast tree

for it.

&. Take a &* bit playing te4t and encrypt t$e same using

#"S algorit$m.6. 7rite a program to break t$e above #"S coding

8. Using ,S algorit$m "ncrypt a te4t data and #ecrypt t$e

same.

P!"t & B

%. T$e student s$ould take up t$e case study of Unified

Library application w$ic$ is mentioned in t$e t$eory/ andVizag Institute of Engineering and Technolog !NT"#$%LD


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'odel it in different views i.e Use case view/ logical view/

component view/ #eployment view/ #atabase design/

forward and ,everse "ngineering/ and 9eneration of

documentation of t$e project.0. Student $as to take up anot$er case study of $is:$er own

interest and do t$e same w$at ever mentioned in first

problem. Some of t$e ideas regarding case studies are given

in reference books w$ic$ were mentioned in t$eory syllabus

can be referred for some idea.Note : T$e analysis/ design/ coding/ documentation/

database design of mini project w$ic$ will be carried out in*t$ year s$ould be done in object;oriented approac$ using

U'L and by using appropriate software w$ic$ supports

U'L/ ot$erwise t$e mini project will not be evaluated.

COMPUTER NETWORKS LAB

'!( PRO)RAM SPEC*+*CAT*ON:

Program to implement bit stuffing.AL)OR*T,M:

Ste- '< StartSte- .< ,ead t$e bit string to be transmitted in -=s and

%=s.Vizag Institute of Engineering and Technolog !NT"#$%LD

'


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Ste- < >or stuffing process/ append at begin and end

of t$e string.Ste- 0< C$eck t$e string w$et$er it $as five

consecutive %=s e4cept t$e appending string.Ste- 1< If yes/ insert 3-= bit as stuff in t$e ne4t bit else

transmit t$e ne4t bit.

Ste- 2< Continue t$is process until t$e completion of

string.Ste- 3< Stuffed data is obtained.Ste- 4< !ow destuffing process/ remove t$e appended

string at start and end of string.Ste- 5< C$eck t$e stuffed string again w$et$er it $as

five consecutive %=s.Ste- '6< If yes t$en remove t$e ne4t bit i.e. do not

transmit t$e ne4t bit else transmit t$e data.

Ste- ''< Continue t$is process until t$e last bit of

string.Ste- '.< Original bit data $as been obtained.Ste- '< Stop

Vizag Institute of Engineering and Technolog !NT"#$%LD

(


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PRO)RAM:

?include@stdio.$A

mainB

D

int aE5-F/bE5-F/i/j/countG-/n/cEFGD-/%/%/%/%/%/%/-H

clrscrB

printfBJ"nter t$e lengt$ of t$e string


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H

forBiG-i@niNN

D

ifBaEiFGG% D

bEjFGaEiF

countNN

ifBcountGG5

D

bEjFGaEiF

jNNbEjFG-

countG-

HjNN

H

else

D

bEjFGaEiF

jNN

countG-

H

H

forBiG-i@8iNND

bEjFGcEiFjNN

H

nGj

printfBJT$e frame after bit stuffing is


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printfBJKnJ

:#estuffing:

countGjG-forBiG8i@n;8iNN

D

ifBbEiFGG%

D

aEjFGbEiF

countNN

ifBcountGG5 D

iNN

countG- H

jNN

H

else

D

aEjFGbEiF

jNN

countG-

H

HprintfBJT$e destuffed data is


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*NPUT':

"nter t$e lengt$ of t$e stringrames after stuffing


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*NPUT':

STU>>I!9>I!9rames after destuffing>I!9rames after stuffing!vio"! T>i%;s

Interactions

State 'ac$ines

)"o$-i%; T>i%;s

Packages

A%%ot!tio%! T>i%;s

!otes

Di!;"!ms i% UML:

Class #iagram

Object #iagram

Usecase #iagram

Se\uence #iagram

Collaboration #iagram

Statec$art #iagram

ctivity #iagram

Component #iagram


,)


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#eployement #iagram

C!ss: class is t$e descriptor for a set of objects wit$

similar structure/ be$avior/ and relations$ips. It is

represented by a rectangle.

*%te"f!ce: n interface is a specified for t$e e4ternally;

visible operations of a class/ component/ or ot$er classifier

Bincluding subsystems wit$out specification of internal

structure. It is represented by a circle.

Re!tio%s:

ssociation

#ependency

9enerali[ation

,eali[ation

In addition to t$is t$ere are

#irected ssociation

ggregation and

Composition


,*


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Associ!tio%:

n association is a structural relations$ip t$at

specifies t$e relation between two objects w$en t$ey are at

t$e same level Bpeer level systems.

n ssociation can specify t$e relations$ip/ role of

t$e class and 'ultiplicity.

n ssociation used in class diagram/ Component

diagram/ deployment diagram/ usecase diagrams.

T$e multiplicity can be represented as %;%..//-W

%.

It is represented as followsorm data

entry

0.Ticket

processing

2.Updation

%."nter t$e

details into

system

0.Trigger

ticket for printing

2.Update datain t$e system

,eservation

system

Server %. Process

reservation

data/ process

ticketing and

process

cancellation.0.Update.

Use c!se 9i!;"!ms

0stem

&assenger CounterClerk

'n(uiries for availability

Availability status

Passenger en\uiries for t$e availability of

Seats


/(


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,eservation and ticketing

0stem

&assenger

Counter Clerk

)ill Cancellation form

'nter data into system

Collect issued ticket

Cancels ticket

*eturn money after deduction

Cancellation of issued ticket


/)

&assengerCounter Clerk

)ill re(uisition form

'nter data into system

&rint ticket

Collect fare amount + ssues ticket


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C!ss 9i!;"!m

&assenger

4Name4Fender4ge4ddress

47llorm:;4paaremount:;4collectTic8et:;

*eservation System

4processorm:;4reser9ation:;4fareComputation:;4processTic8et:;4printTic8et:;

Clerk

4Name4Fender4ge

4getDetails:;4getaremount:;4getTic8et:;

..@/..@

&ayment

Credit&ayment Cash&ayment

..@

Class diagram for railway reservation

system


/*


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*%te"!ctio% 9i!;"!ms

Se#$e%ce 9i!;"!m


/+


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A passenger A cler8 A reser9ation sstem

A re>uestorm:;

' A gi9esorm:;

( A returnsilledorm:;

) A entersDetails:;

* A chec8s9ailabilit:;

+ A fareamount

, A pasmount:;

- A triggersTic8et:;

. A printTic8et:;

/ A issueTic8et:;

A updates:;


/,


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Co!bo"!tio% 9i!;"!m

A passenger A cler8 A reser9ation sstem

A re>uestorm:;

' A gi9esorm:;

( A returnsilledorm:;

) A entersDetails:;

* A chec8s9ailabilit:;

+ A fareamount

, A pasmount:;

- A triggersTic8et:;

A printTic8et:;

/ A issueTic8et:;

A updates:;

Collaboration diagram for reservationActivity 9i!;"!ms

GThe Data train and tic8etsH

Data Entered into %&T 0stem

%&T Chec8s 9ailabillit

9ailable

ills %e>uisition rom

%&T rocess the orm

rints Tic8ets

Tic8ets Issued and are mount Collected

Not 9ailable uts Ne< Data and Train


/-


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Activity 9i!;"!m fo" E%#$i"y of se!ts !v!i!be

assenger Cler8 %eser9ation sstem

Gill formdetailsH

assenger Comes to the Counter

GCler8 Enters Details into sstemH

G0ubmits formto cler8HGVerif 9ailabilitiesH

$8Gormmodi7edHNot o8

GInforms the fare amountH

$8

Not o8

Not

GTrigger Tic8ets rinting rocessH

Gprints the Tic8etsH

GIssue Tic8etsH

GCollect mountH

GTrigger "pdate rocessH

Con7rms


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reservation$e%e

*eservation form

update$e%e11artifact33

cancellation$e%e

Cancellation form

Component diagram for reservation

and ticketing

De-oyme%t 9i!;"!m

Clients

Clerk

-iosk

%eser9ation ser9er

*eservation Server

#eployment diagram for ,ailway

reservation system


/


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C!se St$9y

PROBLEM SPEC*+*CAT*ON: C!se St$9y of ATM

t"!%s!ctio%

n !$tom!te9 tee" m!c>i%e BATM or !$tom!tic

b!%=i%; m!c>i%e BABM is a computeri[ed

telecommunications device t$at provides t$e clients of a

financial institution wit$ access to financial transactions in a



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public space wit$out t$e need for a cas$ier/ $uman clerk or

bank teller. On most modern T's/ t$e customer is

identified by inserting a plastic T' card wit$ a magnetic

stripe or a plastic smart card wit$ a c$ip t$at contains a

uni\ue card number and some security information suc$ as

an e4piration date or CC BC. ut$entication is

provided by t$e customer entering a personal identification

number BPI!. Using an T'/ customers can access t$eir

bank accounts in order to make cas$ wit$drawals Bor credit

card cas$ advances and c$eck t$eir account balances as

well as purc$ase cellp$one prepaid credit.

7it$ growing usage of t$e Internet/ people are

utili[ing t$e convenience of online s$opping and t$e ability

to place an order for w$at t$ey want at all $ours of t$e day

and nig$t/ at t$e office/ $ome/ airport/ a cafe/ or just about

anyw$ere you can imagine. T$ey want conveniences of

Internet communications to $elp t$em improve t$eir

productiveness in t$e day to day balance between work and

personal life. 7$ile T'Qs $ave added some convenience

to our lives. +y using T'=s we can make payment

transaction at anytime from anyw$ere.


'


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USE CASE D*A)RAMS:


(


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0stem

"ank client A./ machine

depositewithdrawal

transcation

balance en(uiry valid client

11include33

invalid client

11e2tend33

"ank

verifcation

managedatabaseinvalid &,0

11e2tend33

ACTORS:

' BANKCL*ENT: t$e bank client is a primary actor

w$ic$ $aving an T' card.

. ATM MAC,*NE: T$e T' mac$ine is a primary

actor w$ic$ is used to

Perform t$e online transaction. It is an

intermediate

between t$e bank client and bank.

BANK: T$e +ank is a second actor w$ic$ will

verify t$e bank client account

and also manages t$e database.


)


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USE CASES SPEC*+*CAT*ON O+ TRANSACT*ON:

T$e use case t"!%s!ctio% performs t$e T'transaction w$enever card$older is valid. It contains anot$er

use cases like deposited/ wit$drawal M balance en\uiry.*( MA*N +LOW O+ E


116/148


*( PERS*STENCE CLASSES:

+ank client/ T' mac$ine are t$e persistence classes.**( NON&PERS*STENCE CLASSES:

+ank/ T$ird;party/ +ank database are non;persistenceclasses

SEUENCE D*A)RAM O+ ATM TRANSACT*ON:

8Ove"! ATM t"!%s!ctio%(


+

"ank client

6pin card number

4deposit:;4tranfer:;4


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A ?an8client A TM machineA ?an8

A Insert TMcard:;

' A %e>uest INnum:;

( A Enter INnum:;

) A 9erif INnum:;

* A 9alid IN:;

+ A %e>uest amount:;

, A Enter amount:;

- A


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ACT*uest amount

G9alidH

Enter amount

dispense cash update customer account

close transcation

Gin9alidH

gi9e recipt


-


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STATE C,ART D*A)RAMS O+ ATM

TRANSACT*ON:

ideal

cti9e

9alidate

selecting processing

printreciept

9alidate

selecting processing

printreciept

Insert card

GcontinueH


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DEPLOMENT D*A)RAM O+ ATM

TRANSACT*ON:

A./ machine server

A./$e%e"ank

Ethernet

%06'('

*A# farm


'/


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C!se St$9y 0

ONL*NE BOOKS S,OP

PROBLEM STATEMENT:

Customer can buy books t$roug$ online.

Customers login into t$e website and add or remove to t$e

cart. T$en $e will place t$e order i.e./ t$e cart of t$e books

t$en t$e ware$ouse c$ecks t$at t$e customer is validate user

or not. Customer fills $is details and made payment

transactions. T$e customer got $is books t$roug$ s$ipment.

Customer may get gifts for t$eir transactions. 7rongtransactions can be verified. T$e main objective of t$is case

study ONL*NE BOOK S,OPF is to make t$e customers

purc$ase t$eir books of interest t$roug$ online wit$out

wasting time by stepping into t$e books$ops. T$e customer


'


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can visit t$is site at any time/ searc$ t$e books and place t$e

orders w$ic$ will be delivered by t$e dealer in s$ort period

of time. T$is reduces t$e burden for bot$ t$e customer and

dealer as t$e customer need not travel to t$e cities if t$e

book of $is:$er interest is not available in $is area/ w$ereas

t$e dealer also need not strain $imself by standing in t$e

s$op all t$e time. (ere t$e dealer also need not respond to

eac$ and every customer \ueries. T$roug$ t$is system t$e

customer submits a \uery and gets t$e response from t$e

database. T$e dealer can update t$e stock details of t$e

books in t$e database. T$is project is developed using

SP.!et and S_L Server.

E*ST*N) SSTEM

In t$e current system if a customer wants to purc$ase a book

$e needs to go to t$e s$op and searc$ for t$e book t$en $e

can buy t$at book.


''


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P>ysic! D!t! +o Di!;"!ms:&

Context Level Diagram:-

Use c!se 9i!;"!m:


'(

+ook

S$opCustomer #ealer

Searc$

Order

Ordered +ooks

+ook #etails

Orders

s#etails

dd +ooks


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0stem

Login

create cart

order placing

1alidation

payment

Shipment

customer

individual lecturer

authentication

re>uest

chec8ing

pa

%ecei9e

bookshop sta!

sent

accept

certi7cate

9erif

validate customer11include33

bank

gifts

11e2tend33

Scenario for Use case Diagram:-

'Usec!se N!me ONLINE BOOK SHOP

. P!"tici-!ti%; Acto"

*%st!%ces

%. Customer0. #ealer

E%t"y Co%9itio%s

%. "very customer s$ould

$ave a uni\ue id.0. #ealer s$ould $ave a

login;id and password.


')


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0 +o of Eve%ts

%. Customer s$ouldregister in t$is system

for future purpose.

0. Customer can searc$for $is:$er books of

interest.

2. Customer order books.

*. T$e Customer provides

t$e s$ipment details to

w$ic$ address t$e

ordered books s$ouldbe delivered.5. #ealer can update t$e

book details.

&. #ealer delivers t$e

ordered books.

1 S-eci! "e#$i"eme%ts

%. T$e customer can get

t$e \uick response from

t$e server.

ctors< Customer/ +ook s$op staff/ bank.

'ain flow of events< Create cart/ order placing/ validations.

"4ception flow of events< 9ifts to customer/ canceling

orders


'*


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C!ss Di!;"!ms:

cart

6total mone

4place order:;4cancle order:;

credit card

6card number6date of e2pire

4chec8 authorized charge:;

customer

6customer6billing address

6deli9er address6email6rating

4create customer:;4get customer:;4change status:;

items to buy

6unit price

4add:;6remo9e:;

database

6user name6boo8 name

4store:;4update:;4delete:;

fre(uent shopper

6discount rate6appro9al date

4appro9al:;4disappro9e:;

2arehouse

6name

4update:;4delete:;

&/..@

&

&..@

&..@

&

&

/..@


'+


127/148


#atabase depends on t$e ware$ouse means adding new

customers and books done by 7are$ouse. Customers add

$is books to t$e cart and make order at a time. payment isdone t$roug$ credit cards and receives t$eir books t$roug$

s$ipment.

Se#$e%ce !%9 Co!bo"!tio% 9i!;"!ms:


',


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c A customer


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Coobo"!tio% Di!;"!m:

c A customer

< A database

card A credit card

c A cart

sta= A #arehouse

& A login:;

* A place order:;

' A authentication:;

+ A 9ie


130/148


ACT*


131/148


STATE C,ART D*A)RAM:


(


132/148


ideal

sho< order

add boo8s to cart place order

login

sho< cart

chec8 to add

pament

shipment

COMPONENT D*A)RAM:


('


133/148


online shopping

login$html11artifact33

user3customer

items

users

permissions

authentication

DEPLOMENT D*A)RAM:

s


((


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TEST*N)

Test cases for customer registration:-

Test C!seCo%9itio% Bei%;

C>ec=e9EG-ecte9 O$t-$t

%. If password

is not

matc$edwit$

confirm

password.

Password G

confirmpassword.

'ismatc$edpassword.

0. Password is

empty.

Password lengt$

A&.

Password

s$ould $ave at

least &

c$aracters.

2. Customerid contains

spaces.

Customer ids$ould be alp$a

numeric.

+lank spaces

are not allowed.

*. P$onenumber

Is !umeric.

P$one number

s$ould benumeric.

Test Cases for Customer Verification:-


()


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%. Password Password lengt$A&. Invalidpassword.

0. LoginS$ould not beempty.

Invalid loginname.

Test Cases for searching books:-



%. t leastone of t$e

fields

s$ould be

filled.

booknameGnull/

aut$orGnull/

publis$erGnull/

editionGnull.

t least one of

t$e fields must

be filled.

Test Cases for ordering books:-

Test C!se Co%9itio% Bei%;

C>ec=e9

EG-ecte9 O$t-$t

%. _uantity \uantity@G- _uantity s$ouldbe at least one

to place t$eVizag Institute of Engineering and Technolog !NT"#$%LD

(*


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order.

0. Credit card

no. s$ould be numericS$ould be

numeric only.

2. Credit cardno.

lengt$YG %*invalid creditcard no.

Test Cases for Shipment Details:-



%. ddress addressGnull

address isre\uired to

deliver t$e

order.


(+


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C!se St$9y 1:

PROBLEM SPEC*+*CAT*ON: C!se st$9y of coe;e!9mi%ist"!tio%:

>or a student to enter college $e must first obtain

an application form. >ill t$e details and write an entrance

test/ after \ualifying t$e student issues a rank card. In t$e

counseling system of "'C"T t$e student certificates are

verified and t$en seat is allotted in re\uired college. T$e

college is e\uipped wit$ computer laboratory/ electrical and

electronics laboratory/ "nglis$ laboratory/ embedded

systems laboratory etc. T$e library $as several volumes of

books/ journals/ maga[ines/ news papers etc.


(,


138/148


$SE CASE D*A)RAMS O+ COLLE)E

ADM*N*STRAT*ON:

0stem

Student

college administration

asks the certicates

Submits certicates

veries the certicates

invalid certicates

11e2tend33

'n(uires about courses

o!ers the courses

selects the course

gives the fees details

pays the fee

ssues # card

rank card

11include33

managerclerk

ACTORS:

' St$9e%t: T$e student is t$e primary actor w$o

re\uests for seat. Coe;e !9mi%ist"!tio%: T$e college administrator

is t$e primary actor w$o verifies t$e certificates and

grants t$e seat


(-


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a Ce"=: one w$o collects t$e certificates from t$e

student and submits to t$e administrator for

verification.

b M!%!;e": one w$o manages t$e collegeadministration`

USE CASES SPEC*+*CAT*ON O+ EAM*NAT*ON:

T$e $se&c!se specifies t$e college admission by

verifying t$e certificates and allotting t$e seat

*( MA*N +LOW O+ E


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CLASS D*A)RAMS O+ COLLE)E

ADM*N*STRAT*ON:


)/


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college

4college name4address4phone

4maintain database:;

department

4department t4dept name

4time table:;4add d:;4sta=:;

library

4te2t boo8s4boo8 name4author name

4issues:;4rene


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SEUENCE D*A)RAM O+ COLLE)E

ADM*N*STRAT*ON:

8A9mitti%; ! St$9e%t i%to t>e coe;e(:

s A student a A admission cell college database

A as8s the certi7cates:;

' A submits the certi7cates:;

( A 9eri7es the certi7cates:;

) A en>uires about the ran8 card:;

* A submits the ran8 card:;

+ A 9eri7es the ran8 card:;

, A chec8s for the a9ailabilit of seats:;

- A a9ailble:;

. A enters the details:;

/ A issues the id card:;11destro33


)'


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COLLOBARAT*ON D*A)RAM O+ COLLE)E

ADM*N*STRAT*ON:

8Rec"$itme%t of t>e f!c$ty(

p A participant

i A inter9ie


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ACT*


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student sstem ser9er

enters the I address

opens the login page

accepts

enters the user name and passuests

9eri7es student details

in9alid

displas >uestion paper

9alid

ans


146/148


STATE C,ART D*A)RAMS O+ COLLE)E

ADM*N*STRAT*ON:

8A STUDENT *SSU*N) A BOOK *N A L*BRAR(

Idle

0tudent re>uirement Chec8 7neboo8 a9ailable

7ne e2ists

boo8 not a9ailable

issue boo8

stores information to database

7ne doesnKt e2ist


)+


147/148


COMPONENT D*A)RAM O+ COLLE)E

ADM*

N*STR

AT*ON

:

student$db college$db

.tlb

contains the

tables of student

.tlb

contains the

tables of college

.e2e

contains

e2ecute 7les

.dll

contains the

librar 7les

admission

DEPLOMENT D*A)RAM O+ COLLE)EADM*N*STRAT*ON:


),


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student server

console

%06'('

ETE%NET

*A#

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