多选题Which two statements about the use of VLANs to segment a network are true?（）AVLANs increase the size of collision domains.BVLANs allow logical grouping of users by function.CVLANs simplify switch administration.DVLANs enhance network security.

第1题：

Which two statements are true about L2TP tunnels?（） (Choose two.)

• A、Traffic is clear text
• B、Traffic is encrypted 
• C、They are initiated by the LNS
• D、They are initiated by the LAC

第2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3题：

You are designing your network to be able to use trunks. As part of this process you are comparing the ISL and 802.1Q encapsulation options. All of these statements about the two encapsulation options are correct except which one？（）

• A、Both support normal and extended VLAN ranges.
• B、ISL is a Cisco proprietary encapsulation method and 802.1Q is an IEEE standard.
• C、ISL encapsulates the original frame.
• D、Both support native VLANs.
• E、802.1Q does not encapsulate the original frame.

第4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5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6题：

Which two statements about bigfile tablespaces are true？ （）

• A、The bigfile tablespace have only one data file.
• B、The segment space management is automatic.
• C、The extent management is dictionary managed.
• D、The database can have only one bigfile tablespace.
• E、The bigfile tablespace can be converted to a smallfile tablespace.

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 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14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15题：

In an environment in which multiple VLANs have been defined on Catalyst Express 500 switches， which two statements are correct for ports that have been configured with the Smartport role of "IP Phone + Desktop"？（）

• A、The names of the VLANs used by the SmartPorts are case insensitive
• B、The ports may belong to a configurable data VLAN
• C、The names of the VLANs used by the Smartports are not relevant
• D、The ports may belong to many VLANs， depending on how many PCs are connected to each port.
• E、The names of the VLANs used by the Smartports are case sensitive

第16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17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.

第18题：

Which two statements are true about a bitmap index？ （）

• A、It is recommended for the columns that have unique values.
• B、It can be converted to a B-tree index by using the ALTER INDEX command.
• C、It has a bitmap segment for each distinct value in the key column， containing a string of bits in which each bit represents the presence or absence of a key column value.
• D、Updating the key column locks the whole bitmap segment that contains the bit for the key value to be updated.

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