In an MPLS domain, LSR can be divided into Ingress LSR, Transit LSR and Egress LSR according to the way the LSR processes data. For the same FEC, a certain LSR can be the Ingress LSR of the FEC or the Transit LSR of the FEC.

In the VLAN aggregation technology, multiple Sub-VLANs are used to isolate the wide recruitment area, and these Sub-VLANs are aggregated into a logical Super-VLAN. A company divides different departments into different Sub-VLANs because of the Sub-VLAN. VLAN not only includes physical connections, but also can establish a three-layer VLANIF interface, which can directly communicate with the external network on the three-layer.

Which of the following regular expressions can only match BGP routing entries that pass through AS200 and then AS300?

What is the flooding scope in OSPFv3 for the LSA in the entire autonomous system?

In order to speed up the perception of link failures in the IS-IS network, IS-IS can be linked with BFD.