What is true about a Bypass Tunnel in MPLS Fast Reroute?（）A、Only configured on the egress routerB、Only configured on the ingress routerC、Is pre-signalled to reduce packet lossD、Must intersect the primary LSP at two locations

第1题：

第2题：

Which three statements about the Cisco MPLS TE Fast Reroute （FRR） process are true？（）

• A、TE tunnels that are configured with the FRR option cannot be used as backup tunnels.
• B、TE tunnels that are configured with the FRR option can be used as backup tunnels.
• C、The backup tunnel that is used to protect a physical interface must have a valid IP address configured.
• D、Interfaces must use MPLS global label allocation.
• E、The source IP address of use backup tunnel and the merge point （MP） should not be reachable.

正确答案:A,C,D

第3题：

The DAI feature has been implemented in the Company switched LAN.  Which three statements  are true about the dynamic ARP inspection （DAI） feature？ （）

• A、 DAI can be performed on ingress ports only.
• B、 DAI can be performed on both ingress and egress ports.
• C、 DAI is supported on access ports， trunk ports， EtherChannel ports， and private VLAN ports.  
• D、 DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP  caches of hosts in the domain.
• E、 DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.
• F、 DAI is supported on access and trunk ports only.

正确答案:A,C,E

第4题：

With MPLS Fast Reroute, what is the "point of local repair"?（）

• A、egress router
• B、ingress router
• C、start of the bypass tunnel
• D、all routers in the bypass tunnel

正确答案:C

第5题：

Which two statements about the use of SCREEN options are correct? （）(Choose two.)

• A、SCREEN options offer protection against various attacks
• B、SCREEN options are deployed prior to route and policy processing in first path packet processing
• C、SCREEN options are deployed at the ingress and egress sides of a packet flow
• D、SCREEN options, you must take special care to protect OSPF

正确答案:A,B

第6题：

You need to configure port security on switch R1.  Which two statements are true about this  technology？ （）

• A、 Port security can be configured for ports supporting VoIP.
• B、 With port security configured， four MAC addresses are allowed by default.
• C、 The network administrator must manually enter the MAC address for each device in order for  the switch to allow connectivity.
• D、  Withsecurity configured， only one MAC addresses is allowed by default.  
• E、 Port security cannot be configured for ports supporting VoIP.

正确答案:A,D

第7题：

What is the term "ordered control" mean regarding how MPLS LSPs are established?（）

• A、establish starting at the egress router going back to the ingress router
• B、establish starting at the ingress router going downstream to the egress router
• C、establish when a router learns of a new prefix
• D、establish when the path correctly matches the reverse path forwarding check

正确答案:A

第8题：

Where is the IS-IS Network Entity Title configured?（）

• A、per IP interface
• B、per virtual router
• C、only on LAN interfaces
• D、only on WAN interfaces

正确答案:B

第9题：

第10题：

第11题：

第12题：

第13题：

第14题：

What is true about IP Source Guard with port security？（）

• A、Binding should be manually configured.
• B、It is not supported if IEEE 802.1x port-based authentication is enabled.
• C、The DHCP server must support option 82， or the client is not assigned an IP address.
• D、It filters based on source IP address only.

正确答案:C

第15题：

Which CLI command is used to enable MPLS Fast Reroute on a ingress router?（）

• A、mpls fast reroute
• B、mpls fast-reroute
• C、enable mpls fast-reroute
• D、tunnel mpls fast-reroute

正确答案:D

第16题：

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

正确答案:B

第17题：

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 default
• B、EXP selection is between multiple tunnels to the same destination
• C、There is no requirement for IGP extensions
• D、Tunnels are configured using the policy-class command and carry multiple EXP values
• E、It supports VRF traffic， IP-to-MPLS switching， and MPLS-to-MPLS switching

正确答案:D

第18题：

What two statistics appear in show frame-relay map output?（）

• A、The number of FECN packets that are received by the router
• B、The number of BECN packets that are received by the router
• C、The ip address of the local router
• D、The value of the local DLCI
• E、The status of the PVC that is configured on the router

正确答案:D,E

第19题：

Which two statements are true about L2TP tunnel switching?（）

• A、Requires only one tunnel switching license.
• B、Requires two licenses，one for inbound and one for outbound sessions.
• C、Enabled automatically when the BSR is configured as an LAC and LNS.
• D、Aids in L2TP tunnel scaling

正确答案:B,D

第20题：

Which two statements are true about L2TP tunnel switching?（）

• A、Requires only one tunnel switching license.
• B、Requires two licenses, one for inbound and one for outbound sessions.
• C、Enabled automatically when the BSR is configured as an LAC and LNS.
• D、Aids in L2TP tunnel scaling.

正确答案:B,D

第21题：

第22题：

第23题：