CCNP security VPN 642-648 official cert guide по Hooper, Howard

MPLS-enabled applications emerging developments and new technologies по Minei, Ina

Deploying next generation multicast-enabled applications label switched multicast for MPLS VPNs, VPLS, and wholesale Ethernet по Joseph, Vinod

MPLS-enabled applications emerging developments and new technologies по Minei, Ina, Lucek, Julian

Available for University of the Philippines Diliman College of Engineering via IEEE Xplore. Click here to access
Also available remotely for University of the Philippines Diliman College of Engineering via IEEE Xplore. Click here to access thru EZproxy

Network virtualization по Moreno, Victor CCIE

Firewalls and VPNs principles and practices по Tibbs, Richard W.

Comparing, designing, and deploying VPNs по Lewis, Mark

VPNs a beginner's guide по Mairs, John

Virtual private networks technologies and solutions по Yuan, Ruixi

Virtual private networks technologies and solutions по Yuan, Ruixi