Basic Network and Routing Concepts - Connecting Remote Locations with the Headquarters - Connectivity Overview

5 important questions on Basic Network and Routing Concepts - Connecting Remote Locations with the Headquarters - Connectivity Overview

Name three main groups of VPN solutions connecting remote and branch offices

- MPLS-based VPNs
- Tunneling VPNs
- Hybrid VPNs

What is MPLS technology?

a mechanism in high-performance telecommunications networks that directs data from one network node to the next based on short path labels rather than long network addresses, avoiding complex lookups in a routing table; works on layer 2 and 3.

What is a Pseudowire?

It emulates a wire between PE routers that carries Layer 2 frames across the IP-MPLS backbone
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Name the 2 basic Layer 2 MPLS VPN service architecture

- VPWS
A point-to-point technology that allows the transport of any Layer 2 protocol at the PE

- VPLS
This emulates an ethernet multiaccess LAN segment over the MPLS core and provides multipoint-to-multipoint

Name most widely deployed options of Tunneling VPNs

- GRE
This is a tunneling protocol developed by Cisco that enables encapsulation of arbitrary Layer 3 protocols inside a point-to-point, tunnel-over-ip network; not encrypted.

- IPsec
Framework that uses a set of cryptographic protocols to secure traffic at Layer 3. It also secures any network application or communication that uses UP as transport protocol.

- DMVPN
DMVPN solution architecture is primarily used to better scale IPsec hub-to-spoke and spoke-to-spoke designs in large networks.

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