Some Interview question on Networking

Here are some interview questions on networking asked in various companies at the time of interviews
1.How many way to configure a router?
2.How to configure SMTP connector in exchange server 2003 for external outgoing mail?
3.What are Network Components and explain their uses?
4.which components require for Exchange Server 2007 installation?
5.what is the Differnece between IPLC & ISDN?
6.What is data com?? How it works, what is diffrence between datacom and telecom?
7.What is the difference between a primary server and a secondary server?
8.What are two characteristics of clients in data networks?
9.How can run the computer without Hard disk?
10.how does works ARP protocol?
11.can we change the MAC address of Network card?
12.how secure is SAP applications?
13.Are both UDP and IP unreliable to the same degree? Why or why not?
14.Can you perform the OSI model seven layer functions in either two layer or three layer.
15.What is the differnce between win 2000 server & win 2003 server?
16.I am having WINDOWS 2003XP.can i INSTALL WINDOWS2003SERVER IN E DRIVE IS IT POSSIBLE?
17.what is the role of Domain controller in lan ? What is the active directory ?
18.What are the advantages and disadvantages of router?
19.What are the advantages and disadvantages of switch?
20.what is the advantage and disadvantage of hub