A. Allows the remote PE to determine which VPNv4 routes should not be imported to a specific VRF instance.

B. Allows the remote CE to determine which VPNv4 routes be imported to a specific VRF instance.

C. Allows the remote PE to determine which VPNv4 routes be imported to a specific VPN routing and forwarding (VRF) instance.

D. Allows the remote CE to determine which VPNv4 routes should not be imported to a specific VRF instance.

A. After two devices receive a Keepalive message from each other, the LDP session is successfully established.

B. The label switching router (LSR) with the larger transport address initiates a TCP connection.

C. After the TCP connection is successfully established, the active party sends an Initialization message to negotiate with the passive party about parameters used for establishing an LDP session.

D. LDP Neighbor Discovery Hello messages are encapsulated using TCP with the multicast destination address of 224.0.0.2.

A. MPLS supports multi-layer nesting. The value of the S bit of the innermost label is 1.

B. The label space range of dynamic signaling protocols such as LDP and MP-BGP from 16 to 1023.

C. When an IP packet is transmitted on an MPLS network that uses TTL processing in pipe mode, the TTL value of the IP packet decrements by 1 only at the ingress and egress nodes of the MPLS network.

D. The MPLS label is 20 bits long and is used for packet forwarding.

A. Mismatching duplex modes

B. Using the wrong cable category

C. Mismatching speeds

D. The port being errdisabled on the switch

A. ISIS ISIS silent ISIS ISIS interface configuration, then this interface will not send packets, but will receive packets

B. In the broadcast network, the first can be divided into IPv4 IPv6 DIS priority settings.

C. In the same broadcast network, if each router is supported, IPv4 IPv6 IPv4 IPv6 DIS and , and must be the same device

D. By default, the priority of the broadcast network interface is Level-1 Level-2 DIS 1 and