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Showing posts from August, 2006

Network Address Translation( NAT)

Network Address Translation (NAT) allows you to convert one IP address into another address. Address Translation process changes the IP address information in a packet to a different address. NAT feature is introduced to solve two major issues faced in networking: face the shortage of IP addresses and hide the network scheme. Now the major function of Address Translation is to convert the private IP addresses in a network into a public IP address. This tutorial explains the major functions, different types and working of NAT. Different Types of Address Translation Address Translation is of different types depends on the way and the number of IP addresses they translate. Static NAT In Static Network Address Translation, one IP address in a packet is translated to different IP address manually. It is one to one mapping. Dynamic NAT In Dynamic Network Address Translation, address translation device picks an IP address dynamically to convert from a list of allowed IP addresse

Dynamic Host Configuration Protocol (DHCP) CCNA Exam Tutorial

The Dynamic Host Configuration Protocol (DHCP) allows devices to dynamically get IP address information. It is very important in networks especially for big networks because it assigns IP addresses to each device in the network automatically. Think about a network having thousands of devices. It is very difficult to assign static IP addresses to each device without having errors. Here Dynamic Host Configuration Protocol helps us. This protocol assigns an IP address to each device without any errors and is very easy to manage. It contains two parts, the server, and client. Working of Dynamic Host Configuration Protocol We can simply use the term DORA to explain the working of DHCP. It is a four-stage process and each stage is explained below. D-- DHCP Discovery When a client connected to a network, it sends a broadcast to discover the DHCP server. This broadcast is termed as DHCPDISCOVER. O--- DHCP Offer At this stage, the server responds to the client DISCOVERY message

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Alex George
Alex George has Engineering graduation in Computer Science and an MBA in Finance. He had been working as a senior Network Engineer for ten years. His specialization is in Cisco products. Traveling is one of his hobbies and visited various places as part of his onsite work. He visited different places as part of his onsite work like New York, Dubai, London, etc. Right now Alex is a director of one of the leading career development firms in India, which trains students for UPSC, SSC, and PSC examinations. He guides a lot of students to get selection for various prestigious institutions like CBI, Income Tax Department, etc. Alex George is a stock market investor and a very active intraday trader. Engineering Background: He has a B.Tech in Computer Science and Engineering and passed different network and security courses like CCNA, CCNP (Security), CEH, and various Microsoft certifications. Finance Background: Alex has an MBA in Finance. He is an active intraday trader and a Share Market Investor. Webmaster Skills: Alex is a blogger since 2004. He has a working knowledge of HTML, CSS, PHP, and JavaScrip.