ISM Dipak
Chhetri
Dipak Chhetri (HND / Fourth Semester) 2
2.1) Introduction ...................................................................................................................................13
2.2) Different internet services ..............................................................................................................13
2.2.1 Intranet .....................................................................................................................................13
Advantages of Intranets ..............................................................................................................................13
Disadvantage of Intranet.............................................................................................................................14
2.2.2 Email........................................................................................................................................14
Advantages of Email:...................................................................................................................................14
Disadvantages of Email ...............................................................................................................................14
2.2.3 Ecommerce...............................................................................................................................15
Features of E-commerce .............................................................................................................................15
Benefits of E-commerce ..............................................................................................................................15
2.2.4 E-Commerce.............................................................................................................................15
Advantages of ecommerce..........................................................................................................................16
Disadvantages of E-commerce ....................................................................................................................16
2.2.5 Certificate services ...................................................................................................................16
Advantages of CA........................................................................................................................................16
Disadvantages.............................................................................................................................................17
2.2.5) DNS ........................................................................................................................................17
Benefits of DNS ...........................................................................................................................................17
Comparison: Primary and Secondary DNS ...................................................................................................18
2.2.6) DHCP......................................................................................................................................18
Benefits of DHCP.........................................................................................................................................18
2.2.7) Directory services....................................................................................................................19
Advantages of Directory services.................................................................................................................19
Disadvantages of Directory services ............................................................................................................19
2.3 Inter-networking servers..................................................................................................................20
2.3.1 Database servers .......................................................................................................................20
Advantages of database server ...........................................................................................................20
2.3.2 E-commerce servers..................................................................................................................20
Advantages of ecommerce server ...............................................................................................................21
2.3.3 Email Servers ...........................................................................................................................21

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