更多"Which of the following correctly de"的相关试题:
[多项选择]Which of the following correctly describe the various functions and virtues of a router?（）
A. Packet switching
B. Collision prevention on a LAN segment.
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internetwork communication
[多项选择]Which of the following correctly describe steps in the OSI data encapsulation process?（）
A. The transport layer divides a data stream into segments and may add reliability and flow control information.
B. The data link layer adds physical source and destination addresses and an FCS to the segment.
C. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E. The presentation layer translates bits into voltages for transmission across the physical link.
[多项选择]Which four statements correctly describe functions that are available in SQL?（）
A. INSTR returns the numeric position of a named character.
B. NVL2 returns the first non-null expression in the expression list.
C. TRUNCATE rounds the column, expression, or value to n decimal places.
D. DECODE translates an expression after comparing it to each search value.
E. TRIM trims the heading of trailing characters (or both) from a character string.
F. NVL compares two expressions and returns null if they are equal, or the first expression of they are not equal.
G. NULLIF compares twp expressions and returns null if they are equal, or the first expression if they are not equal.
[多项选择]Which three statements correctly describe the functions and use of constraints? （）
A. Constraints provide data independence.
B. Constraints make complex queries easy.
C. Constraints enforce rules at the view level.
D. Constraints enforce rules at the table level.
E. Constraints prevent the deletion of a table if there are dependencies.
F. Constraints prevent the deletion of an index if there are dependencies.
[多项选择]Which three statements correctly describe the features of the I/O calibration process?（）
A. Only one I/O calibration process can run at a time.
B. It automates the resource allocation for the Automated Maintenance Tasks.
C. It improves the performance of the performance-critical sessions while running.
D. It can be used to estimate the maximum number of I/Os and maximum latency time for the system.
E. The latency time is computed only when the TIMED_STATISTICS initialization parameter is set to TRUE.
[多项选择]Which three statements correctly describe the Cisco Validated Designs program? （）(Choose three.)
A. includes three design levels
B. incorporates products and technologies into enterprise, service provider, and commercial systems
C. extends the value of designs through a sustained development plan
D. does not factor customer input design process
E. facilitates faster and more reliable customer deployments
F. incorporates a narrow range of technologies and products
[多项选择]Which two statements correctly describe a situation in which an Active/Standby Service Module design is being used?（）
A. Troubleshooting is more complicated.
B. Service and switch modules are underutilized.
C. Layer 2 adjacency is required with the servers that use this design.
D. Layer 3 adjacency is required with the servers that use this design.
E. Load balancing will always occur across both access layer uplinks.
[多项选择]Which two of these correctly describe Fibre Channel? （）
A. supports multiple protocols
B. works only in a shared or loop environment
C. allows addressing for up to 4 million nodes
D. allows addressing for up to 8 million nodes
E. provides a high speed transport for SCSI payloads
F. may stretch to a distance of up to100 km before needing extenders
[多项选择]Which two of these correctly describe asymmetric routing and firewalls?（）
A. only operational in routed mode
B. only operational in transparent mode
C. only eight interfaces can belong to an asymmetric routing group
D. operational in both failover and non-failover configurations
E. only operational when the firewall has been configured for failover
