單項選擇題

Refer to the exhibit. The show mpls interfaces detail command has been used to display information about the interfaces on router R1 that have been configured for label switching. Which statement is true about the MPLS edge router R1?（）

A.Packets can be labeled and forwarded out interface Fa0/1 because of the MPLS operational status of the interface.
B.Because LSP tunnel labeling has not been enabled on interface Fa0/1， packets cannot be labeled and forwarded out interface Fa0/1.
C.Packets can be labeled and forwarded out interface Fa1/1 because MPLS has been enabled on this interface.
D.Because the MTU size is increased above the size limit， packets cannot be labeled and forwarded out interface Fa1/1.


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1.單項選擇題What is a reason for implementing MPLS in a network？（）

A.MPLS eliminates the need of an IGP in the core.
B.MPLS reduces the required number of BGP-enabled devices in the core.
C.Reduces routing table lookup since only the MPLS core routers perform routing table lookups.
D.MPLS eliminates the need for fully meshed connections between BGP enabled devices.

2.多項選擇題What are two possible actions an IOS IPS can take if a packet in a session matches a signature？（）

A.reset the connection
B.forward the packet
C.check the packet against an ACL
D.drop the packet

3.單項選擇題Which statement describes Reverse Route Injection （RRI）？（）

A.A static route that points towards the Cisco Easy VPN server is created on the remote client.
B.A static route is created on the Cisco Easy VPN server for the internal IP address of each VPN client.
C.A default route is injected into the route table of the remote client.
D.A default route is injected into the route table of the Cisco Easy VPN server.

4.多項選擇題Which three techniques should be used to secure management protocols？（）

A.Configure SNMP with only read-only community strings.
B.Encrypt TFTP and syslog traffic in an IPSec tunnel.
C.Implement RFC 3704 filtering at the perimeter router when allowing syslog access from devices on the outside of a firewall.
D.Synchronize the NTP master clock with an Internet atomic clock.
E.Use SNMP version 2.
F.Use TFTP version 3 or above because these versions support a cryptographic authentication mechanism between peers.

5.多項選擇題If an edge Label Switch Router （LSR） is properly configured，which three combinations are possible？（）

A.A received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.
B.An IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.
C.There is an MPLS label-switched path toward the destination. A received IP packet is dropped because the destination is not found in the IP forwarding table.
D.A received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.
E.A received labeled IP packet is forwarded based upon both the label and the IP address.
F.A received labeled packet is forwarded based on the label. After the label is swapped，the newly labeled packet is sent.