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Which three statements are true about policing？（）
A . Out-of-profile packets are queued.
B . It causes TCP retransmits.
C . Marking and remarking are not supported.
D . It does not respond to BECN and foresight messages.
E . It uses a single- and two-bucket mechanism for metering.
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Which three IP multicast address related statements are true？ （Choose three.） （）
A . Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live （TTL） greater than 1.
B . Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers.
C . Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link-local addresses used by PIMv2 and IGMPv3.
D . Because they would map to overlapping IP multicast MAC addresses， multicast addresses 224.0.1.1 and 238.1.1.1 could not be used together.
E . Multicast address 224.0.1.1 has been reserved for the Network Time Protocol （NTP） by the IANA
F . The administratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addresses.
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Which three statements about RSTP are true？（）
A . RSTP significantly reduces topology reconverging time after a link failure.
B . RSTP expends the STP port roles by adding the alternate and backup roles.
C . RSTP port states are blocking，discarding，learing，or forwarding.
D . RSTP also uses the STP proprsal-agreement sequence.
E . RSTP use the same timer-baseed process as STP on point-to-point links.
F . RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.
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In order to enhance worker productivity， a Cisco wireless network has been implemented at all locations. Which three statements regarding WLAN are true？（）
A . A WLAN client will operate in half-duplex mode.
B . The Aironet 1230 access point is an example of an access point that operates solely as a lightweight access point.
C . Ad hoc mode allows mobile clients to connect directly without an intermediate AP.
D . WLANs are designed to share the medium and can easily handle an increased demand of channel contention.
E . A lightweight AP receives control and configuration from a WLAN controller to which it is associated.
F . Another term for infrastructure mode is independent service set （IBSS）.
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Which three statements about subqueries are true? （）
A . Asinglerowsubquerycanretrieveonlyonecolumnandonerow.
B . Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns.
C . Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.
D . Amultiplerowsubquerycanbecomparedusingthe"；>；"；operator.
E . AsinglerowsubquerycanusetheINoperator.
F . Amultiplerowsubquerycanusethe"；="；operator.
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Which three statements are true regarding subqueries?（）
A . Subqueries can contain GROUP BY and ORDER BY clauses
B . Main query and subquery can get data from different tables
C . Main query and subquery must get data from the same tables
D . Subqueries can contain ORDER BY but not the GROUP BY clause
E . Only one column or expression can be compared between the main query and subquery
F . Multiple columns or expressions can be compared between the main query and subquery
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Which three statements about RSTP are true?（）
A . RSTP significantly reduces topology reconverging time after a link failure.
B . RSTP expends the STP port roles by adding the alternate and backup roles.
C . RSTP port satates are blocking,discarding,learing,or forwarding.
D . RSTP also uses the STP proprsal-agreement sequence.
E . RSTP use the same timer-baseed process as STP on point-to-point links.
F . RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.
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Which three statements are true?（）
A . A final method in class X can be abstract if and only if X is abstract.
B . A protected method in class X can be overridden by any subclass of X.
C . A private static method can be called only within other static methods in class X.
D . A non-static public final method in class X can be overridden in any subclass of X.
E . A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
F . A method with the same signature as a private final method in class X can be implemented in a subclass of X.
G . A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.
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Which three statements about subqueries are true?（）
A . A single row subquery can retrieve only one column and one row.
B . A single row subquery can retrieve only one row but many columns.
C . A multiple row subquery can retrieve multiple rows and multiple columns.
D . A multiple row subquery can be compared by using the ">" operator.
E . A single row subquery can use the IN operator.
F . A multiple row subquery can use the "=" operator.
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Which three statements are true about persistent configuration?（） (Choose three.)
A . A user cannot set privileges on the persistent lightweight jobs
B . Persistent lightweight jobs generate a large amount of metadata
C . It is possible to create fully self-contained persistent lightweight jobs
D . The use of a template is mandatory to create persistent lightweight jobs
E . Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time
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Which two WLAN implementation statements are true？（）
A . An autonomous wireless solution includes lightweight APs and WLAN controllers. The APs and the WLAN controllers are managed by a WLAN solution engine （WLSE/WLSM）.
B . An autonomous wireless solution includes lightweight APs and WLAN controllers. The APs and the WLAN controllers are managed by the Cisco Wireless Control System （WCS）.
C . A lightweight wireless solution includes lightweight APs and WLAN controllers. The APs and the WLAN controllers are managed by a WLAN solution engine （WLSE/WLSM）.
D . A lightweight wireless solution consists of autonomous access points （APs）， which are managed by a WLAN solution engine （WLSE/WLSM）.
E . A lightweight wireless solution includes lightweight APs and WLAN controllers. The APs and the WLAN controllers are managed by the Cisco Wireless Control System （WCS）.
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Which three statements are true？（）
A . The default constructor initializes method variables.
B . The default constructor has the same access as its class.
C . The default constructor invoked the no-arg constructor of the superclass.
D . If a class lacks a no-arg constructor， the compiler always creates a default constructor.
E . The compiler creates a default constructor only when there are no other constructors for the class.
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Which three statements about EIGRP are true?（）
A . EIGRP converges fast RIP because of DUAL and backup routes that are stored in the topology table.
B . EIGRP uses a hello protocol to establish neighbor relationships
C . EIGRP uses split horizon and reverse poisoning to avoid routing loops.
D . EIGRP uses periodic updates to exchange routing information
E . EIGRP allows routers of different manufacturers to interoperate
F . EIGRP supports VLSM and authentication for routing updates.
G . EIGRP use a broadcast address to send routing information.
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Which three statements are true about DAI？（）
A . DAI intercept all ARP packets on untrusted ports
B . DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the DHCP Snooping database.
C . DAI is used to prevent against a DHCP Snooping attack.
D . DAI forwards all ARP packets received on a trusted interface without any checks.
E . DAI forwards all ARP packets on untrusted ports.
F . DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the CAM table.
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Which three statements are correct about RIP version 2? (Choose three.)（）
A . It has the same maximum hop count as version 1.
B . It uses broadcasts for its routing updates.
C . It is a classless routing protocol.
D . It has a lower default administrative distance than RIP version 1.
E . It supports authentication.
F . It does not send the subnet mask in updates.
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Which three statements are true about TACACS+？（）
A . It is a Cisco proprietary protocol.
B . It runs on TCP port 59. .
C . Authentication and authorization are done at different stages.
D . TACACS+ encrypts the entire body of the packet， but leaves a standard TACACS+ header.
E . It is an industry standard protocol.
F . TACACS+ encrypts both the entire body of the packet and the TACACS+ header.
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Which three statements are true about policing？ （）
A . Out-of-profile packets are queued.
B . It causes TCP retransmits.
C . Marking and remarking are not supported.
D . It does not respond to BECN and foresight messages.
E . It uses a single- and two-bucket mechanism for metering.
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Which three statements about NetFlow are true？（）
A . NetFlow records unidirectional IP traffic flow.
B . NetFlow records MPLS frame flow.
C . NetFlow expert is only over TCP.
D . NetFlow records is only over UDP.
E . NetFlow records subinterface information of traffic flow.
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Which three statements are true about windows？（）
A . Only one window can be open at any given time
B . Consumer groups are associated with windows
C . Windows work with job classes to control resource allocation
D . The database service name must be provided during windows creation
E . Windows can automatically start job or change resource allocation among jobs for various time periods.
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You need to determine the correct wireless LAN topology for use in the Company network. Which three statements are true about the various WLAN topologies？（）
A . In ad hoc mode， the Independent Basic Service Set （IBSS） is a framework in which mobile clients connect directly without an intermediate access point.
B . In Infrastructure mode， the Basic Service Set （BSS） is a framework in which mobile clients use a single access point for connecting to each other or to wired network resources.
C . In Infrastructure mode， the Extended Services Set （ESS） is a framework in which two or more Basic Service Sets are connected by a common distribution system （DS）.
D . In Infrastructure mode， the Independent Basic Service Setet （IBSS） is a framework in which mobile clients connect directly without an intermediate access point.
E . In ad hoc mode， the Basic Service Set （BSS） is a framework in which mobile clients use a single AP for connecting to each other or to wired network resources.
F . In ad hoc mode， the Extended Services Set （ESS） is a framework in which two or more Basic Service Sets are connected by a common distribution system （DS）
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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.
