Only configured on the egress router
Only configured on the ingress router
Is pre-signalled to reduce packet loss
Must intersect the primary LSP at two locations
Which statement about MPLS TE Fast Reroute （FRR） link protection operation is not true？（）A、It requires a next-hop backup tunnel.B、The backup tunnel terminates on the same tail-end router as the primary tunnel.C、The point of local repair （PLR） swaps the label and pushes the backup label.D、The restoration time is expected to be under 50 ms.E、The backup tunnel can have associated bandwidth capacity
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以下告警有可能造成业务中断的有（）A、ETHLOSB、MPLS_TUNNEL_LOVCC、NE_NOT_LOGIND、MPLS_TUNNEL_MISMATCH
为保证MPLS TE Tunnel正确建立，以下关于MPLS TE Tunnel接口的配置说法正确的是（）。A、Tunnel 接口IP地址可以借用Loopback接口的IPB、Tunnel 接口可以配置IP地址也可以不配置IP地址C、每次更改Tunnel 接口上的MPLS TE参数后，都需要使用mpls te commit命令提交配置D、Tunnel 接口视图下，必须配置隧道终点IP地址
What is the encapsulation mode for MPLS running on Ethernet？（）A、Packet modeB、Frame modeC、Transparent modeD、Channel modeE、Tunnel mode
Which statement about MPLS traffic engineering policy-based tunnel selection （PBTS） is not true？（）A、The tunnel that is not configured with the policy-class command acts as the defaultB、EXP selection is between multiple tunnels to the same destinationC、There is no requirement for IGP extensionsD、Tunnels are configured using the policy-class command and carry multiple EXP valuesE、It supports VRF traffic， IP-to-MPLS switching， and MPLS-to-MPLS switching
以下关于MPLS Tunnel的1+1保护和1：1保护描述正确是（）A、如果要对MPLS Tunnel进行保护，需要创建MPLS Tunnel保护组B、对于1：1保护需要APS协议C、1+1保护的业务双发选收，1：1保护的业务单发单收D、MPLS Tunnel保护的APS协议通过保护Tunnel传送，相互传递协议状态和倒换状态
Which of the following is true about the MPLS header and its EXP field size？（）A、The MPLS header is 2 bytes，and the EXP field is 3 bits long.B、The MPLS header is 1 byte，and the EXP field is 3 bits long.C、The MPLS header is 4 bytes，and the EXP field is 3 bits long.D、The MPLS header is 3 bytes，and the EXP field is 3 bits long.
