Which two features can be used to extend VRFs across a campus? (Choose two.)
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Virtual Routing and Forwarding (VRF) is a technology that allows multiple virtual routing tables to coexist on a single physical router or switch. Each VRF instance is independent of the others and has its own set of routes and forwarding tables, providing a layer of network separation and security.
To extend VRFs across a campus, we need to use a technology that can carry multiple VRFs over a single physical link or network. Here are the two features that can be used to achieve this:
802.1q is a protocol that provides VLAN tagging for Ethernet frames. By configuring a trunk port on a switch, we can carry traffic for multiple VLANs over a single physical link. In the context of VRFs, we can assign each VRF instance to a separate VLAN and carry those VLANs over the same trunk. This allows VRF traffic to traverse the campus network without mixing with traffic from other VRFs.
Generic Routing Encapsulation (GRE) is a tunneling protocol that can be used to carry packets from one network over another network. In the context of VRFs, we can configure a GRE tunnel between two routers or switches and assign each VRF instance to a separate GRE tunnel. This allows VRF traffic to traverse the campus network as if it were on a separate physical link.
LDP, MPLS TE, and port channels are not features that can be used to extend VRFs across a campus. LDP and MPLS TE are protocols used for label switching and traffic engineering in MPLS networks, while port channels are used to aggregate multiple physical links into a single logical link. Although these technologies can be used in conjunction with VRFs, they do not directly extend VRFs across a campus.