Refer to the exhibit. MPLS has been configured on all routers in the domain. In order for R2 and R3 to forward frames between them with label headers, what additional configuration will be required on devices that are attached to the LAN segment?（）

单项选择题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.

单项选择题WhatisareasonforimplementingMPLSinanetwork？（）

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.

多项选择题WhataretwopossibleactionsanIOSIPScantakeifapacketinasessionmatchesasignature？（）

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

单项选择题WhichstatementdescribesReverseRouteInjection（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.

多项选择题Whichthreetechniquesshouldbeusedtosecuremanagementprotocols？（）

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.