Encryption authentication - point to point , Computer Networking

Assignment Help:

Encryption Authentication

One common  technique  used to encrypt and authenticate in VPNs is IP security. IP sec  is a collection of protocols designed by the IETF( Internet Engineering  Task Force) to provide  security for a packet carried by the internet. instead it provides a framework and  a mechanism it leaves the selection of the  encryption authentication method  to the user.

IP sec  uses an authentication heard. The  authentication header  is an extra header  added to the data packet at the transport layer before  the IP  header is added.

When  an IP datagram carries an authentication header the protocols  field sin the IP header changes to a value of 51 show that the  datagram carries an AH A  field inside  the AH defines  the original  value  of eh protocols fields.

IP sec  uses  a mechanism  called encapsulation security  payload. ESP first  the  data  packet at the  transport layer  then  adds one extra header and one  extra trailer.

The ESP  header  define the algorism used for encryption. The ESP  trailer aligns the  packet  to the length required by some  encryption  algorithms. The ESP  trailer aligns tains  the authentication data  for the  whole packet excluding the IP  header. The value  of the  protocols  fields is 50 in the IP header  to indicate the use  of ESP.


Related Discussions:- Encryption authentication - point to point

Illustrate TCP – bytes and segments, Q. Illustrate TCP – bytes and segments...

Q. Illustrate TCP – bytes and segments? TCP - bytes & segments TCP at the sending site collects bytes into a packet called a segment TCP adds a header to each se

Connection-oriented service, Sender requests connection from network. Other...

Sender requests connection from network. Other receiver agrees to connection. Computers interchange data through connection. One-endpoint requests network to split connection when

Domains and sub domains, Hosts are generally, individual machines at a spec...

Hosts are generally, individual machines at a specific location. Normally Resources of host machine are shared and can be used by any user on Internet. Hosts & local networks are g

What are the two types of transmission technologies, What are the two types...

What are the two types of Transmission technologies, basis on which computer networks can be categorized? Broadly there are two types of transmission technology: 1. Broadc

Explain the characteristics of mobile computing applications, Question : ...

Question : a) In your view, what are the top three strengths and weaknesses of wireless systems? Rank them in order of priority. What can be done to address the weaknesses?

Explain the meaning of disassociation, Explain the meaning of Disassociatio...

Explain the meaning of Disassociation A notification from either a station or an AP that an existing association is terminated. A station should provide this notification befor

Operating system for server, Operating system for Server Since 1994, w...

Operating system for Server Since 1994, when the original pair of web servers - NCSA HTTPd and CERN HTTPd , were proposed, dozens of commercial and shareware programs have

What is usage of sequence number in reliable transmission, What is usage of...

What is usage of Sequence Number in Reliable Transmission? The protocol specifies that frames need to be numbered. This is done by using sequence numbers. A field is added to t

Disadvantage of vpns - point to point , Disadvantage of VPNs The disad...

Disadvantage of VPNs The disadvantages of VPN  are related to implementation troubleshooting  trust and  internet  availability. a.Implementation  can be time consuming: Im

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd