About the basic procedure MPLS, ? Forwarded the following description is the error

A. When IP MPLS, IP Tunnel ID Tunnel ID 0x0, and MPLS report domain, check the destination address. If the value is 1, enter the forwarding process.

B. , PHP Egress1 3 The point allocation of the support point is the default. The value of the section of the penultimate hop is set to .

C. When IP MPLS is entered and the MPLS IP is reported to the domain, the device reporting layer inserts a new label in the header and header of the text.

D. When the packet is reported in the MPLS, , and MPLS domain, it is forwarded according to the table label. The label of the top label is replaced by the label allocated by the next hop.

Which of the following statements regarding BGP route reflectors (RRs) are true?

A. An RR advertises routes learned from a client to all connected non-clients and clients.

B. A backbone network is divided into multiple reflection clusters. Each RR is configured as a non- client of the other RRs, and establishes full-mesh 1BGP connections with each other.

C. Cluster_list is an optional non-transitive attribute and is used to prevent loops in a cluster.

D. The Originator_ID attribute is generated by an RR to prevent loops between clusters.

When receives or transmits data frames on an access port, what will the switch do?

A. Switch will send tagged frames belong to a specified vlan

B. When received a tagged frame from an access port. Switch may forward it vlan

C. Switch will learn the MAC-address only on access port

D. Switch only receives untagged frames from access port and drop all tagged frames

Which of the following statements regarding OSPFv3 Router-LSAs is true?

A. The data part of a Router-LSA contains the interface IDs of the local router and its neighbors' router ID.

B. When LS type in the LSA header is 0x0001, the data part of the LSAs is a Router-LSA.

C. Similar to OSPFv2, the Option field exists in an LSA header rather than the data part of a Router- LSA.

D. The data part of a Router-LSA contains the link-local address.

Which of the following technologies can be used to improve the MPLS BGP VPN reliability?

A. VPN GR

B. FRR for private IP routes between Pes and CEs

C. VPN FRR

D. CE dual-homing networking at the access layer