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- PROXIES AND VPN
- =================
- PROXY / PROXY SERVERS
- ======================
- Proxy are the Dummy Servers which helps us by allocating an IP Address of themselves to us which is for temporary basis.
- It acts as a middle man between DNS server and client accessing it.
- THey alocate a IP Address of any location, and give us the permission to access the web service which is blocked.
- To find out the loaction of a Global IP - "ip2location.com"
- Proxies are of 3 Types
- ========================
- 1. Web Based Proxy or Proxy Servers - These are the Websites which are acting as a Proxy Server and allows to act as a intermediater between client and server.
- For eg. - kproxy.com
- ninja proxy etc.
- 2. Web Extension Based Proxy - THese are the Proxy Servers Client Agents which are enabled in our browser and helps to as behaving like a proxy dummy server.
- For eg. Anonymox, Hola Proxy Extension etc.
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- VPN - VIRTUAL PRIVATE NETWORK
- ==============================
- Virtual Private Network is more advanced technology which allows authorized clients to access the Virtually Created Network which will be safe and set the anonymity of a person. They are most advanced then proxies and basically a new virtual network created by organizations or anyone for there personal usage.
- THey are only can be accessed by authorized people only usually in corporates for accessing there confidential resources..
- More Functionalities that Proxies:
- = Tunneling of data - So that there can be a secret passage which will not be known to anyone.
- = Encryption of Data- It encrypts or make the data in the unreadable format. Sairam "Hello Sanjeev -> 13453267gsds"
- = It gives you better functionalities of networking.
- = Authorization and Authentication - Only authorized people can access it.
- Eg. PROXPN, VPNBOOK.COM , free of cost
- ------------------------------------------------------------------------
- Standardisation Followed for commiunication into a Particular Network
- OSI REFERENCE MODEL
- ====================
- 1. Physical Layer - Wired / Wireless, Bitwise conversion of data
- 2. Data Link Layer- MAC Addressing
- 3. Networking Layer - LOgical Addressing and IP Fragmentation
- 4. Transport Layer - Define the Port Addressing and Routing Architecture
- 5. Session Layer - Existance of a particular Session created by the Application.
- 6. Presentation Layer - Bit Conversion and Fragmentation of data packets
- 7. Application Layer - UI of any application -Whatsapp etc.
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