Discuss the following questions very briefly a What is the d

Discuss the following questions very briefly.

a. What is the difference between a VPN and MPLS?

b. What is the difference between P and PE router? Can I make

my PE as P?

c. Does LDP require OSPF, IS-IS or BGP?

d. What is the difference between MPLS, IPSec and SSL?

e. Can I use existing IPv4 MPLS backbone for IPv6?

Solution

a) Virtual Private Network is a computer network. The privacy connects that the data that travels over the VPN is not visible to, or encapsulated from, the traffic of the underlying network. This is possible because of strong encryption most VPNs are deployed to be high security network tunnels. As such, the traffic that happens within the VPN is seen as another traffic stream to the undrlying network.In a technical sense, the link layer protaocols of the virtual nerwork that is, the lowers layer of the Internet Protocalo suite are tunnelled through the transport network underneath. In lay terms, the connection is thought of as a pipe in a pipe the outer pipe is your internet connection.

Multiprotocol Label Switching is a mechanism that directs and carries data from one network node to th next. it easier to create a virtual links between distant nodes. It also has the ability to encapsulate packets of a variety of netrwork protodcols. It is a highly a calable, protocol independent, data carryying mechanism. This basically means that data packets are assigned labels and decisions are regarding where they will be forwarded based on the contents of the label, without ever having to examine the packet itself. As such, a user is able to create end to circuits across any type of medium used for virtual transportation and uning any protocal. The main objective is to eliminate dependence on may specific Data link layer technology.

secure VPNs use cryptographic tunnelling protocol in order to provide the necessary and inteded confidentiality, send authentication, and message integrity in order to achieve the highest level of security. The protocols that carry ou these functions include many features that include, get aren\'t limited to Internet Protocol security, which is standard based security protocol with mandatory support; Transport layer security.

MPLS is operable at the OSI Model layer which lies between traditional definitions of layer . It is often times referenced as th Layer 2.5 protocol. It was designed specifically to provide unified tata carrying servicd for circuit based clients and packet switching clients that provide a datagram service model. It was also designed to be able to carry a variety of traffic.

b) P router doesn\'t have Customer network routes where in PE router is having customer network routes. Another reason is P route doesn\'t require MP-iBGP but for PE, it is must.

To make your PE router as P, You need to remove the BGP configuratoons and after that it will not participate with customer network.

c) Edge routers run BGP between themselves to exchange external prefixes. Edge and core P router run IGP (usually OSPF of IS-IS) to find optimum path toward BGP next hops;

d) SSL often makes use of the browse to encrypt data between end user and the server , and is commonly used for areas of websites that require the protedtion of confidentiality and integrity of the data.

VPN/ IPSec requires specific VPN Client software and is generally for providing remote access to system or networks. Also there is the option to go for 1.2F Insted of IPSec.However SSL VPNs are decoding more prevalent as a means to provide access to networks systems via the web browser. This qpproach has many benefits as it users the common web browser to enable the secure connection. The grannularity of this approach is also a good way to control accesses to specefic applications.

e) IPv6 is the next generation IP address standard intended to supplement and ecentually replace IPv4 proctoc ol most Internet services use today. Every computer mobile phone and any other device connected to the internet needs a numerical IP address in order to communicate with other devices. The original IP address scheme called IPv4 is running out of numbers. Please see the internet society IPv6 Face sheet or our IPv6 Basics page fo more information on IPv6.