Which two statements about the use of VLANs to segment a network are true?()A. VLANs increase the size of collision domains.B. VLANs allow logical grouping of users by function.C. VLANs simplify switch administration.D. VLANs enhance network security.

第1题：

Which of the following statements is true about the 80/20 rule （Select all that apply）？（）

• A、20 percent of the traffic on a network segment should be local.
• B、no more than 20 percent of the network traffic should be able to move across a backbone.
• C、no more than 80 percent of the network traffic should be able to move across a backbone.
• D、80 percent of the traffic on a network segment should be local.

第2题：

A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

• A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.
• B、For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.
• C、Direct inter-vlan communication does not require OSPF
• D、OSPF cannot be used if router-on-a-stick is configured on the router

第3题：

Which two statements are true about optical networks?（）

• A、SONET and SDH both use time-division multiplexing.
• B、An optical transport network system uses time-division multiplexing.
• C、SONET and SDH both use wavelength-division multiplexing.
• D、An optical transport network system uses wavelength-division multiplexing.

第4题：

You need to decide on the best router redundancy protocol to use in the Company network.  Which  two statements are true about HSRP， VRRP， and GLBP？（）

• A、 GLBP and VRRP allow for MD5 authentication， whereas HSRP does not.
• B、 HSRP allows for multiple upstream active links being simultaneously used， whereas GLBP  does not.
• C、 GLBP allows for router load balancing of traffic from a network segment without the different  host IP configurations required to achieve the same results with HSRP.
• D、 Unlike HSRP and VRRP， GLBP allows automatic selection and simultaneous use of multiple  available gateways.
• E、 GLBP allows for router load balancing of traffic from a network segment by utilizing the creation  of multiple standby groups.

第5题：

Which of the following a true statements regarding the use of VLANs to segment anetwork? （）

• A、They increase the size of collision domains
• B、They allow logical grouping of users by function.
• C、They can enhance network security.
• D、They increase the size of the broadcast domain while decreasing the number of collision domains.
• E、They increase the number of broadcast domains while decreasing the size of the broadcast domains.
• F、They simplify switch administration.

第6题：

Which two statements about the use of VLANs to segment a network are true? （）

• A、VLANs increase the size of collision domains.
• B、VLANs allow logical grouping of users by function.
• C、VLANs simplify switch administration.
• D、VLANs enhance network security.

第7题：

Which two statements are true regarding transactions in an Oracle database（）

• A、Multiple transactions can use the same undo segment.
• B、A transaction is assigned an undo segment when it is started.
• C、More than one transaction cannot share the same extent in the undo tablespace.
• D、The transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.

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第13题：

Which two statements about NTP version 4 are true？（）

• A、It supports fast synchronization at starting and before network failures
• B、It supports automatic server discovery
• C、It uses a fixed-point arithmetion
• D、It supports the "nanokernel" kernel implementation
• E、It does not support Public-Key Cryptography

第14题：

Which two statements about configuration an unconnected Catalyst Express 500 switch from setup mode using a PC are true？（）

• A、You may use Cisco Network Assistant to set up the initial configuration
• B、You must use CLI for initial configuration
• C、You may use either CLI or CAN for configuration
• D、You may make a direct connection to the PC from any point on the switch
• E、You may only make a direct connection from the port with the flashing green LED to the PC

第15题：

Which two statements are true about overflow pools？（）

• A、Overflow pools do not support PAT
• B、Overflow pools can not use the egress interface IP address for NAT
• C、Overflow pools must use PAT
• D、Overflow pools can contain the egress interface IP address or separate IP addresses

第16题：

Which two statements are true about the configuration of voice VLANs？（）

• A、Static secure MAC addresses can be configured in conjunction with voice VLANs.
• B、PortFast is automatically enabled when voice VLANs are configured.
• C、PortFast must be manually configured when voice VLANs are configured.
• D、Voice VLANs are typically configured on uplink ports.
• E、Voice VLANs are typically configured on access ports.

第17题：

You need to design the VLAN scheme for the Company network. Which two statements are true  about best practices in VLAN design？（）

• A、Routing should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer.
• B、Routing should always be performed at the distribution layer.
• C、VLANs should be localized to a switch.
• D、VLANs should be localized to a single switch unlessvoice VLANs are being utilized.
• E、Routing should not be performed between VLANs located on separate switches.

第18题：

Which two statements are true about pool-based destination NAT？（）

• A、It also supports PAT.
• B、PAT is not supported.
• C、It allows the use of an address pool.
• D、It requires you to configure an address in the junos-global zone.

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