A virtual private network (VPN) extends a private network across public networks just like the net. It permits a bunch laptop to send and receive information across shared or public networks as if they were an integral a part of the non-public network with all the practicality, security and management policies of the non-public network. this can be done by establishing a virtual point-to-point affiliation through the employment of dedicated connections, encryption, or a mixture of the two.
The VPN association across the web is technically a large space network (WAN) link between the sites. From a user perspective, the extended network resources area unit accessed within the same method as resources accessible from the private network—hence the name "virtual private network"
Cisco merchandise support the most recent in VPN technology. A VPN may be a service that gives secure, reliable property over a shared public network infrastructure like the net.
VPNs maintain identical security and management policies as a personal network. they're the foremost price effective technique of building a virtual point-to-point association between remote users associated an enterprise customer's network. There are three main forms of VPNs.
Access VPNs—Provide remote access to associate enterprise customer's computer network or Extranet over a shared infrastructure. Access VPNs use analog, dial, ISDN, digital telephone line (DSL), mobile IP, and cable technologies to firmly connect mobile users, telecommuters, and branch offices.
Intranet VPNs—Link enterprise client headquarters, remote offices, and branch offices to an inside network over a shared infrastructure mistreatment dedicated connections. computer network VPNs dissent from Extranet VPNs therein they permit access solely to the enterprise customer's staff.
Extranet VPNs—Link outside customers, suppliers, partners, or communities of interest to Associate in Nursing enterprise customer's network over a shared infrastructure mistreatment dedicated connections. Extranet VPNs dissent from computer intranet VPNs therein they permit access to users outside the enterprise.
Cisco VPN routers—Use Cisco IOS computer code IPSec support to modify a secure VPN. VPN-optimized routers leverage existing Cisco investment, good for the hybrid WAN. Cisco Secure PIX Firewall—Offers a VPN entryway different once the safety cluster "owns" the VPN.
Cisco VPN Concentrator series—Offers powerful remote access and site-to-site VPN capability, easy-to-use management interface, and a VPN shopper.
Cisco Secure VPN Client—Enables secure remote access to Cisco routers and PIX Firewalls and runs on the Windows software.
Cisco Secure Intrusion Detection System (CSIDS) and Cisco Secure Scanner—Can be wanting to monitor and audit the protection of the VPN.
Cisco Secure Policy Manager and Cisco Works 2000—Provide VPN-wide system management.
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