Question { Honeywell, 3920 }

What is the difference U have seen from a Dos environment to
windows environment?

Answer

Dos
CLI( Command Line Interface)
Single user OS
Single Process

Windows
GUI ( Graphical User Interface )
Multi user
Moulti process

Question { 6637 }

What are the ways to troubleshoot the network, techniques,
commands?

Answer

If u want be a good network administrator u should under
stand all concepts clearly such as Topologies, Protocols,
Client/server technology.

Here i am giving the commands to trouble shoot the network.

1) ipconfig - this is the command which shows your present
Tcp/IP configuration.

2) ipconfig /all- command which shows your present Tcp/ip
configuration as well as Host name, Physical address, DNS &
DHCP ip addresses and lease duration period.

3) ipconfig /release - if u r using dynamic ip address this
command helps to remove the ip address.

4) ipconfig /renew - this helps to renew the ip address from
DHCP Server.

Trouble shooting steps

1) first Ping your loop back address 127.0.0.1 with
this u can verify u r NIC status.
2)then Ping your own ip address if u r getting reply
3) ping gateway ip address of your network
4)Using NSLOOKUP command verify the dns server ip
address and ping DNS

Question { Accenture, 6898 }

how many systems can i connect in class "A,B AND C" as well
as private and publi network?

Answer

Class A
N.H.H.H-for one network
Ex 1.0.0.0-1.255.255.255=16581375

Networks=126*16581375


Class B

N.N.H.H
172.168.1.0-172.168.255.255=65000
Networks=16384*65000

Class C
N.N.N.H

192.168.1.0-192.1681.255=255

Networks=2,097,152*255

Question { IBM, 8583 }

How do we install an operating system(for ex. window xp)in
a computer system? Tell me the steps....

Answer

installation can be done in different methods.
1) Fresh installation 2) unattended installation
3) Up gradation 4) Network Installation

Fresh Installation
Switch on comp
-->Press del key or f2 to enter in to the BIOS
-->after entering Change the boot order to CD Drive
--> press f10 to save settings-->comp will restart insert
Bootable Windows XP CD
--> press any key to boot with CD option will press any
key to boot with cd
--> Setup will start->Press f8 for license agreement
--> then u will get HDD Partitions
-->Create partitions according to your requirement
-->then select partition (C:)
-->select file system select quick NTFS Format
-->it will copy and restarts comp
-->then enter time zone,computer name,Product
Keyand network settings setup will install automatically
-->after that it will ask for the user name
create and update options select
--> finish

Question { 3043 }

what is an operating system?what are the functions of
operating system?give examples of operating system for
worsation(clients)and network operating system?

Answer

Operating System is interface between user and computer.
in other words we can say its a software which act as a
translator between comp and user.
Operating systems 1)Client OS 2)Server OS

Client Operating System which is limited for standalone Comp.
If you create a user in client os this is user is limited
for that comp only.

Server Operating system which is can controls the network
with the help of Network services Like DNS,DHCP,Active
directory.
If you create a user on a server comp which is installed
network operating system means in Active directory that user
can login any computer in the network

Question { 5853 }

what are the work of 7 layers in osi model?

Answer

Application Layer
User interface Layer

Presentation Layer

Session Layer
Which Separtes data from one application to another
Transport
to transfer data using UDp,TCP
Network Layer
Logical Addressing( IP addressing ) Routing

Data Link Layer
Physical addressing ( MAC addressing), Framing,Error
Control,Flow control

Physical Layer
Cables, connectors & Hub
Responsible for bit transmission

Question { HCL, 16324 }

What is the DHCP role?

Answer

Dynamic Host Honfiguration Protocol(DHCP)

It is responsible for assign ip address automatically.
This service will reduce administrative work.
If you installed DHCP in server and cofigured the ip range
to use for the clients it will do dynamically ip
configuration to the client.