更多"In an Ethernet network, under what "的相关试题:
[多项选择]In an Ethernet network, under what two scenarios can devices transmit?（）
A. when they receive a special token
B. when there is a carrier
C. when they detect no other devices are sending
D. when the medium is idle
E. when the server grants access
[多项选择]What are two reasons a network administrator would use CDP (Choose two.)（）。
A. to verify the type of cable interconnecting two devices
B. to determine the status of network services on a remote device
C. to obtain VLAN information from directly connected switches
D. to verify Layer 2 connectivity between two devices when Layer 3 fails
E. to obtain the IP address of a connected device in order to telnet to the device
F. to determine the status of the routing protocols between directly connected routers
[多项选择]What are two reasons that a network administrator would use access lists (Choose two.)（）。
A. to control vty access into a router
B. to control broadcast traffic through a router
C. to filter traffic as it passes through a router
D. to filter traffic that originates from the router
E. to replace passwords as a line of defense against security incursions
[多项选择]Under which two circumstances should Spanning Tree Protocol be implemented?（）
A. to ensure a loop-free topology
B. to protect against user-side loops
C. when a VLAN spans access layer switches
D. for the most deterministic and highly available network topology
E. because of the risk of lost connectivity without Spanning Tree Protocol
[单项选择]Under what conditions will the formation of cancer begin ( )
A. When a chromosome breaks apart near an oncogene and its control functions fail.
B. When people drink too much and are easy to get tired.
C. When people smoke too much and are difficult to get to sleep.
D. When people eat too much petroleum-based products.
[多项选择]When HSRP is configured on a network, which two of these items are provided, which are sharedbetween the routers that run HSRP? （）(Choose two.)
A. TCP-based hello packets
B. the impact of flapping links if timers are too low
C. a shared single interface
D. the ability to track serial interfaces
E. UDP-based hello packets
[单项选择]Under what condition are you allowed to depart from the rules of the road（）.
A. To avoid immediate danger
B. When authorized by the rig superintendent
C. To comply with an operator's requirement
D. Under no conditions
[单项选择]In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?（）
A. single ATM header
B. single Ethernet header
C. ATM header followed by a PPP header
D. ATM header followed by an Ethernet header
[单项选择]Under what conditions can the EPA put off its action
A. No new regulations.
B. No new president and Congress.
C. No appropriate technology.
D. No swift proceeding.
[单项选择]In a switched LAN network, what is the Spanning-Tree algorithm used for?（）
A. It is used to provide a mechanism for routing updates in switched environments.
B. It is used to prevent routing loops in networks with redundant routes.
C. It is used to prevent switching loops in networks with redundant switched routes.
D. It is used to manage, the addition, deletion, and naming of VLANs across multiple switches.
E. It is used to segment a network into multiple collision domains.
F. None of the above.
G. All of the above are functions of STP.
[多项选择]What two technologies do SMB customers most often want to implement in the future?（）
A. Mobility
B. Optical
C. Telepresence
D. Voice
E. Data Center
[多项选择]What two are the prerequisites for enabling Flashback Database?（）
A. The database must be in ARCHIVELOG mode
B. The database must be in MOUNT EXCLUSIVE mode
C. The database must be opened in RESTRICTED mode
D. The database instance must be started in the NOMOUNT state
E. The database instance must have the keep buffer pool defined
[多项选择]What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)
A. It cannot generate recommendations that support multiple workload queries.
B. It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.
C. It can recommend partitioning only on tables that have at least 10,000 rows.
D. It can recommend only B-tree indexes and not bitmap or function-based indexes
