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

Network, do you do paraphrase

do you do paraphrase

Discuss your strategy to test wlpc system, Wireless Phone Company (WLPC) is...

Wireless Phone Company (WLPC) is a provider of wireless phone service in the US with 100,000 customers serving mostly small markets. WLPC has just purchased additional airwaves in

What are all the base services provided by the os, What are all the Base se...

What are all the Base services provided by the OS? Interprocess communications (IPC) Task preemption Task priority Local/Remote Interprocess communication Semaphor

Name the twisted pairs cables, Name the Twisted pairs cables Twisted pa...

Name the Twisted pairs cables Twisted pairs cables (Shielded and Unshielded), Coaxial cable and Fiber optic cable. ?Testing of the points ?Testing of the entire network t

Write down code snippets for the following in jade, Question 1 Using a ...

Question 1 Using a flowchart and appropriate annotations, describe the execution path of an Agent in JADE 2 Write down code snippets for the following in JADE a Agent A n

Command to copy the ios image to a tftp server, What is the command to copy...

What is the command to copy the IOS image to a TFTP server? Ans) Copy flash tftp

Diffuse reflection in the basic illumination model, Question: (a) By ma...

Question: (a) By making use of an example, explain the Cohen-Sutherland line clipping algorithm. (b) Compare and contrast between the CMY and RGB colour models. (c) Expla

Why it is essential to have layering in a network, Q. Why it is essential t...

Q. Why it is essential to have layering in a network? Ans: A computer network is a very complicated system. It becomes very hard to implement as a single entity. The layered ap

Mime the multipurpose internet mail extensions, MIME The Multipurpose Inter...

MIME The Multipurpose Internet Mail Extensions While  the message  headers described in are satisfactory for sending  ordinary  ASCII text they are  not sufficiently Reich for

Telnet protocols - transport layer, TELNET Protocols The TCP/ IP proto...

TELNET Protocols The TCP/ IP protocol  suite  includes a simple textual  remote terminal protocols called  TELNET  that allow  a user to log into  a computer across an interne

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