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

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

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

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

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Network virtualization per Moreno, Victor CCIE

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

Comparing, designing, and deploying VPNs per Lewis, Mark

VPNs a beginner's guide per Mairs, John

Virtual private networks technologies and solutions per Yuan, Ruixi

Virtual private networks technologies and solutions per Yuan, Ruixi