A. Switchover tune of a device's active/standby system

B. Packet delay

C. Monitoring network traffic

D. Monitoring device load(CPU and Memory)

A. Two instances of a VPN share an RT.

B. If routes need to exchange between two VPNs, the value of import RT of one VPN must be partially the same as Export RT of the other VPN.

C. RD and RT of a VPN instance cannot be the same as those of another VPN instance on the same PE.

D. If routers need to exchanged two VPNs, the value of import RT of one of the same as that of RT of the other VPN.

A. Query the MBGP route and then the BGP route

B. Check the RPF based on the next hop of the route that reaches the source RP.

C. Query the BGP route and then the MBGP route

D. Check the RPF based on the source RP contained in the received SA message.

A. It prevents denial-of-service (Dos) attacks from changing the CHADDR value

B. It prevents Mac Flood attacks.

C. It prevents fake DHCP server attacks.

D. It prevents DHCP starvation attacks.

A. The CES packet recovery technology requires the intermediate node to support transparent clock transmission.

B. The 802.1as technology requires the intermediate node to support transparent clock transmission.

C. The NTP technology requires the intermediate node to support transparent clock transmission.

D. The IEEE1588 technology requires the intermediate node to support transparent clock transmission.

A. Establish two physical or logical links with the PE to manage devices on the public and private networks. One link belongs to the public network and the other belongs to the private network.

B. Leak public and private network routes to manage devices on the public and private networks.

C. Construct an outband NM network to manage all devices.

D. Establish a physical or logical link with the PE and mount MCEs to the PE to manage devices on the public and private networks.

A. 1530

B. 1518

C. 1522

D. 1526

A. More logical links must be configured between ASBR-PEs when more VPNs are deployed.

B. Option A provides excellent scalability and supports a great number of VPNs.

C. The VPN instances on an ASBR-PE can be bound to both physical interfaces and logical interfaces.

D. ASBR-PEs communicate with each other only through EBGP.

E. ASBR-PEs communicate with each other through any multi-instance (PE-CE) capable routing protocol.

A. If a forwarding fault is detected on the public network side of the PW between PE 1 and PE 2, traffic from CE 2 to CE 1 can be switched to the PW between PE 1 and PE 3.

B. If a forwarding fault is detected on the PW between PE 1 and PE 2, traffic can be switched to the backup PW on PE 1.

C. If a forwarding fault is detected on the PW between PE 1 and PE 2, traffic from CE 1 to CE 2 can be switched to the PW between PE 1 and PE 3.

D. The PW between PE 1 and PE 2 is the primary PW.

A. One label; label value: 3

B. One label; label value: 2200

C. Two labels; label value: 1200 for the outer label and 2200 for the inner label

D. Two labels; label value: 3 for the outer label and 2200 for the inner label

A. An RD is shared by VRFs on PE 1 and PE 2.

B. CE cannot be connected to a PE through OSPF.

C. CE can be connected to a PE through OSPF only when the PE also runs OSPF.

D. BGP routes must be imported to OSPF areas on a PE.

A. ^100_([0-9]*)$

B. 100_([0-9]+)$

C. ^100_([0-9]*)

D. ^100_([0-9]+)$

A. VRIDs of the VRRP must be bound with the NAT during NAT configuration in the outbound direction between domain.

B. The FTP Nat Alg function must be enabled on the firewall

C. The NAT cannot be used in easy IP mode.

D. VRIDs of the VRRP do not need to be bound with the NAI during NAI configuration in the outbound direction between domains.