Desktop Support Questions

What is active directory?

Active directory authorizes and authenticates all users and computers in a window domain network, ensuring the security of the computer and software. Through active directory various functions can be managed like creating admin users, connecting to printers or external hard drives.

What is DHCP and what it is used for?

DHCP stands for dynamic host configuration protocol. It is used to allocate IP addresses to a large number of the computer system in a network.  It helps in managing the large number of IP’s very easily.

What is DNS?

DNS mean Domain Naming Service and it is used for resolving IP addresses to name and names to IP address. DNS is like a translator for computers, computers understand the number and not the alphabet. For example, if we type like hotmail.com, the computer don’t understand this so they use DNS which converts (hotmail.com) into (numbers) and then executes the command.

What is forward and reverse lookup in DNS?

When we convert IP address into names is called Reverse lookup, while converting names into IP address is called Forward lookup

What is ‘A’ record and what is ‘MX record’?

‘A’ record is also known as host record, and it has ability to map the IP address by  name. It is with this record that DNS can find out the IP address of a name. While, ‘MX record’ also known as mail exchanger record, by the help of ‘MX’ record, location of the mail server is identified. The record is also found in DNS.

What is IPCONFIG command?

IPCONFIG command is used to display the IP information of the computer assigned like DNS IP address and gateway IP address.

What would you use to connect two computers without using switches?

Cross cables are used to connect two computers without using switches.

What is a domain?

Domain is a set of computers which network recognizes by the internet. It can be used by 

centrally administer computers. It is created when you install active directory.

What are the types of operating system or O.S?

 The two types of operating systems are:  NOS : Network Operating System. Examples of NOS- Windows NT, 2000,2003 SOS : Simple Operating System. Examples of SOS - Windows 95,98, ME

Explain about RAS server?

RAS means Remote Access Server.  It allows operating the tool or information that typically resides on a network or IT devices through combination of hardware and software, for example connecting to printer or file. It is usually used for mobile users who are in the network. It uses telephone line to provide connectivity to its users. It can also connect two or more than two offices in the network.

Explain about VPN server?

VPN means Virtual Private Network. It is a private communications network often used by companies or organizations to communicate confidentially over a public network.  This is used by the mobile users in the network.

What is Ping command?

Between two or more devices, to check the physical IP connectivity Ping command is used.

What is OU?

OU means for Organizational Unit. It is a container within Active Directory which can hold users, groups and computers.  It is the smallest unit on which administrator can assign group policy settings.

Explain group policy?

Group policy provides the stream line access to all the users in the network, it can be used to define the users security and networking policies.  By group policy you can keep control over certain function like not allowing the users to shut down the system or using the control panel or running the command. Group policy is applicable on active directory container like OU, site and Domain.

What is a “Default Gateway”?

Default gateway is the IP address of the router in the network.  In any case, if the users wants to switch on to another network, or if they cannot locate their particular network than their query will be forwarded to default gateway.

How you can take backup of emails in ms outlook?

To take a back-up in the ms outlook, you have to go in control panel. In control panel you have to go under mail option and then open the data file, select personal folder and click on open folder. After that, you have to copy .pst and have to paste it wherever you want the backup.

What is the major difference you can mention about Gateway and Router?

Gateway works on different network architecture and router works on same network 

architecture.

How many classes are there for “IP addresses” and what are the ranges?

They are segregated into five classes

1. Class A ====        0 -126 (127 is reserved for loop back)

2. Class B ====        128- 191

3. Class C ====        192-223

4. Class D ====        224-239

5. Class E ====        240-255

What is the difference between incremental backup and differential backup?

In incremental backup only incremental parts are backup and not the full back up, while in differential backup we take full back up after the normal backup.

What is reservation?

Basically the term “Reservation” is used in DHCP server. Some network equipment or

Computer system needs a specific IP address, in such case we make a reservation in DHCP server for that particular computer system.  By creating reservation it gives access to that particular IP address and at the same time prevents other computer system to use that IP address.

What is SMTP server or POP server?

SMTP stands for simple mail transfer protocol. It is basically used for sending and receiving the mail, whereas, POP stands for post office protocol it is used for mail receiving purpose in the network.