INTERVIEW QUESTIONS NETWORKING COMPUTER NETWORKS DETAILS

Question: How can we create VPN to connect to branch office of the same office.what would be the priliminary requirment?

Answer: First of all what is VPN." VPN " stand for Virtual Private Network .Next how it works and where it is used . VPN works when the IP Conficts and IP is conflict because we dont use the PUBLIC IP means the IP we use is may be used by onther Company or Branch then we use VPN it works in the MAC address principal means it doesnot work on the IP it works Over the IP . And COMPUTER ,INTERNET or INTRANET, DHCP is required for the VPN .

First of all what is VPN." VPN " stand for Virtual Private Network .Next how it works and where it is used . VPN works when the IP Conficts and IP is conflict because we dont use the PUBLIC IP means the IP we use is may be used by onther Company or Branch then we use VPN it works in the MAC address principal means it doesnot work on the IP it works Over the IP . And COMPUTER ,INTERNET or INTRANET, DHCP is required for the VPN .

Source: CoolInterview.com

We can connect to branch office of the same office thru a vpn by using backbone network provided by a service provider. ISP will provide till customer premises and customer at both sites shud use routers (CPE) to connect to the provider network. Packets are tranferred over the provider network as if it is a private network i.e packets from a specific customer are never forwarded to an interface of a router on the backbone network which is not configured for that VPN. Although data of many customers are forwarded on the backbone, the end user feels as if it is a private network.
The preliminary requirement is that u must order for a leased / dedicated line from ISP. Source: CoolInterview.com

1. VPN - Virtual Private Network.
2. Before Internet was so popular, Company used to go for their own leased line to connect two office and two LAN connected using leased line,due to the leased line was privatly own, there was no requirement of security while connecting two office network.
3. Once Internet got so popular, it was easy to connect local ISP at two different location. Once two office connect to Internet they can get connected without going for their own dedicated link. Due to we use Internet to connect two office, we need to secure the data transfered between two office using Internet link. IPSec and SSL secure protocal being used to encript the data transfered between two office.
4. You need ISP Connection, it could be DSL or dedicate line connecting two local router/VPN box.
Source: CoolInterview.com

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