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Networking Interview Questions and Answers

What are the Different steps to be followed to get SSL(Secure Sockets Layer) for our Web Application ?

Author: Srikanth          Posted Date: April 22, 2011    Category: Networking     Points: 40

. Initially we have to Generate a certificate request from our IIS

. Now we have to request a certificate from the certificate authority(CA)

. This CA is an entity which issues Digital Certificates.

. After receiving the certificate we have to install that particular certificate on our Web Server using IIS

. We have to use Secure Hyper Text Transfer Protocol(HTTPS) when accessing secure pages in our application.

By this way we could make our web page as SSL protected. !!!

How does the Transaction topic work in asp ?

Author: Srikanth          Posted Date: April 22, 2011    Category: Networking     Points: 40

In Asp there is an Assembly called System.Transactions which contains classes that allows the applications to work under the transactions which were organized by
Microsoft Distributed Transaction Coordinator (MSDTC ) and
Local Transaction Manager(LTM ).

This System.Transactions assembly allows both implicit and explicit way of operation

The Explicit programming model is based on the Transaction class and
The Implicit programming model using the Transaction Scope class.

How does SMTP support web applications ?

Author: Srikanth          Posted Date: April 22, 2011    Category: Networking     Points: 40

Simple Mail Transfer Protocol (SMTP ) is the standard for sending electronic mails(e-mail) across IP networks.

Using some pre-defined class in the System.Net.Mail and System.Net.Mime assemblies we can send mails to one or more recipients.

These mails can also be sent with alternative views and it can even handle the file attachments.

What are the different methods present in Socket Class?

Author: Srikanth          Posted Date: April 21, 2011    Category: Networking     Points: 40

There are 2 different type of methods present in Socket Class they are :

Synchronous Methods and Asynchronous Methods

In .Net Naming conventions all the ASynchronous Methods names are created by prefixing the words 'Begin' or 'End' to the names of Synchronous Methods

That is

Synchronous Methods :

(a) Connect()
(b) Receive()

ASynchronous Methods :

(a) BeginConnect() and EndConnect()
(b) BeginReceive() and EndReceive()

What is a Socket Class?

Author: Srikanth          Posted Date: April 21, 2011    Category: Networking     Points: 40

Generally a Socket class provides a set of Synchronous and Asynchronous methods for the Synchronous and Asynchronous mode of communication.

We can get this using a name space called

System.Net.Sockets.Socket

What is Application Pooling and what is its advantage ?

Author: Srikanth          Posted Date: April 21, 2011    Category: Networking     Points: 40

Application Pooling ::


An Application Pool can contain one or more applications and allows us to configure a level of isolation between different Web applications.

For example,
Advantage :

if you want to isolate all the Web applications running in the same computer, you can do this by creating a separate application pool for every Web application and placing them in their corresponding application pool.
Because each application pool runs in its own worker process, errors in one application pool will not affect the applications running in other application pools. Deploying applications in application pools is a primary advantage of running IIS 6.0 in worker process isolation mode because you can customize the application pools to achieve the degree of application isolation that you need.

What is Connection Pooling ?

Author: Srikanth          Posted Date: April 21, 2011    Category: Networking     Points: 40

Connection Pooling will make a single connection instance, which allows that instance to connect to all the databases. Advantage is that it does not open and close the connection object multiple times.

Switches?

Author: Shashi Ray          Posted Date: April 29, 2010    Category: Networking     Points: 10

Provide signal flow management.
Replace slower hub.
Being a Data Link Layer device uses MAC address for data transfer.
Data transfer to specific port.

Hubs?

Author: Shashi Ray          Posted Date: April 29, 2010    Category: Networking     Points: 10

Simplest and low cost device.
Also known as Multi-port Repeater.
Operate at Physical Layer like Repeater.
Data transfer to all the ports.

Hub types:
1. Active hub - Provides signal regeneration
2. Passive hub - No signal regeneration
3. Intelligent hub - Provides management of each port

Classful IP Addressing ?

Author: Shashi Ray          Posted Date: April 29, 2010    Category: Networking     Points: 10

IP address structure consists of two addresses, Network and Host.

IP address is divided into five classes.
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