单选题What is the encapsulation mode for MPLS running on Ethernet？（）A Packet modeB Frame modeC Transparent modeD Channel modeE Tunnel mode

第1题：

Which commands, when used together, would create an 802.1Q link?（）

• A、Switch(vlan)# mode trunk
• B、Switch(config)# switchport access mode trunk
• C、Switch(config-if)# switchport mode trunk
• D、Switch(config-if)# switchport trunk encapsulation dot1q
• E、Switch(config)# switchport access mode 1
• F、Switch(vlan)# trunk encapsulation dot1q

第2题：

As a network administrator, you are required to deploy MPLS technology. During the deployment, it is recommended to apply conditional label advertising. What is most probably the reason for that?（）

• A、to enable label switching on the frame mode interface
• B、to restrict MPLS availability to predefined time periods
• C、to restrict end users from seeing the routers in the MPLS network
• D、to restrict label switching to a limited number of networks

第3题：

The Company security administrator wants to prevent VLAN hopping on the network.  What is one  method that can be used to do this？  （）

• A、 Attacks are prevented by utilizing the port-security feature.
• B、 An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the  802.1q encapsulation.
• C、 Configuring an interface with the switchport mode dynamic command will prevent VLAN  hopping.
• D、 An end station attempts to redirect VLAN traffic by transmitting Ethernet frames in the 802.1q  encapsulation.
• E、 Configuring an interface with the "switchport mode access" command will prevent VLAN  hopping.

第4题：

Which three MPLS statements are true？（）

• A、Cisco Express Forwarding （CEF） must be enabled as a prerequisite to running MPLS on a Cisco router.
• B、Frame-mode MPLS inserts a 32-bit label between the Layer 3 and Layer 4 headers.
• C、MPLS is designed for use with frame-based Layer 2 encapsulation protocols such as Frame Relay， but is not supported by ATM because of ATM fixed-length cells.
• D、OSPF， EIGRP， IS-IS， RIP， and BGP can be used in the control plane.
• E、The control plane is responsible for forwarding packets.
• F、The two major components of MPLS include the control plane and the data plane.

第5题：

What is the encapsulation mode for MPLS running on Ethernet？（）

• A、Packet mode
• B、Frame mode
• C、Transparent mode
• D、Channel mode
• E、Tunnel mode

第6题：

What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）

• A、IP unicast in IP unicast
• B、IP multicast in IP anycast
• C、IP anycast in IP anycast
• D、IP multicast in IP unicast
• E、IP multicast in IP multicast
• F、IP unicast in IP multicast

第7题：

SORT_AREA SIZE and HASH_AREA_SIZE parameters are ignored in some of the user sessions. What could be the reason？（）

• A、The User Global Area （UGA） is not configured.
• B、The sessions were started using the login name SYS.
• C、The sessions are running in the Automatic Shared Memory Management mode.
• D、The sessions are running in the automatic Program Global Area （PGA） memory management mode.

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第13题：

When troubleshooting a Frame Relay connection, what is the first step when performing a loopback test?（）

• A、Set the encapsulation of the interface to HDLC
• B、Place the CSU/DSU in local-loop mode
• C、Enable local-loop mode on the DCE Frame Relay router
• D、Verify that the encapsulation is set to Frame Relay

第14题：

What is the data encapsulation method for the VPLS virtual circuit （VC）？（）

• A、MAC over MPLS
• B、L2TPV3
• C、802.1 QinQ
• D、Ethernet over MPLS
• E、GRE

第15题：

What protocol enables Ethernet over SONET/SDH encapsulation interoperability between the G-series and ML-series Ethernet cards？（）

• A、 LEX
• B、 HDLC
• C、 GFP-F
• D、 PPP/BCP

第16题：

The Company security administrator is concerned with VLAN hopping based attacks. Which two  statements about these attacks are true？ （）

• A、 Attacks are prevented by utilizing the port-security feature.
• B、 An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the  802.1q encapsulation.
• C、 Configuring an interface with the switchport mode dynamic command will prevent VLAN  hopping.
• D、 An end station attempts to redirect VLAN traffic by transmitting Ethernet frames in the 802.1q  encapsulation.
• E、 Configuring an interface with the "switchport mode access" command will prevent VLAN  hopping.

第17题：

If you were to configure an ISL Ethernet trunk between two Cisco switches， named R1 and R2，   what would you have to include at the end of the link for the trunk to operate correctly？ （）

• A、 An identical VTP mode.
• B、 An identical speed/duplex.
• C、 An identical trunk negotiation parameter.
• D、 An identical trunk encapsulation parameter.

第18题：

The database is currently running in the NOARCHIVELOG mode. What would be the first step to configure Flashback Database？（）

• A、 Enable flashback logging.
• B、 Start the database in the ARCHIVELOG mode.
• C、 Issue the ALTER DATABASE FLASHBACK ON； command.
• D、 Set the FAST_START_MTTR_TARGET initialization parameter.

第19题：

Which of the following is a true statement when promiscuous mode is enabled on an Integrated Virtual Ethernet？（）

• A、 The physical port can be used as part of a Shared Ethernet Adapter （SEA）.
• B、 All physical ports on the Host Ethernet Adapter （HEA） default to promiscuous mode.
• C、 Multiple logical ports can be assigned to a physical port if that logical port is in promiscuous mode.
• D、 All physical ports that belong to the same port group will be set to promiscuous mode on the Host Ethernet Adapter （HEA）.

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