What are two advantages of Layer 2 Ethernet switches over hubs？（）

A . Cranes are able to pick up and drop loads over a greater spotting area B . Increased safety because the deck is clear of running and standing rigging C . Simplicity of operation of the crane by its operator D . All of the above

A . cost savings B . product variety C . well-tested interoperability D . regular upgrade proce

A .  provides advanced security such as hardware encryption acceleration B .  provides investment protection through increased modularity C .  comes equipped with at least one 1000-based TX interlace D .  contains integrated wireless access using the 802.11 g/b standard E .  contains integrated web-based management tools for easy configuration and maintenance

A . It improves resync operations when the disk comes online after being taken offline for maintenance purposes.  B . It improves performance in the extended cluster configuration by reading from a local copy of an extent.  C . Fewer extent pointers are needed to describe the file and less memory is required to manage the extent maps in the shared pool. D . This feature enables faster file opens because of the reduction in the amount of memory that is required to store file extents.

A . BMR lowers the mean time to recover （MTTR）. B . BMR supports point­in­time recovery of individual data blocks. C . BMR enables you to use incremental backups for block recovery. D . BMR enables recovery even when the database is not mounted or open. E . BMR enables you to use proxy backups to perform block media recovery. F . BMR enables increased availability of data during recovery because the data file that requires a recovery can remain online.

A .  high scalability B .  the design supports a layered security model C .  firewall addressing does not need to change D .  IPsec decrypted traffic is inspected by the firewall E .  there is a centralized point for logging and content inspectio

A . Filtering can occur based on Layer 3 information. B . Broadcasts are eliminated. C . Routers generally cost less than switches. D . Broadcasts are not forwarded across the router. E . Adding a router to the network decreases latency.

A . Security increases because only the network administrator may change the routing tables B . Configuration complexity decreases as network size increases C . Routing updates are automatically sent to neighbors D . Route summarization is compued automatically by the router E . Routing traffic load is reduced when used in stub network links F . An efficient algorithm is used to build routing tables,using automatic updates G . Routing tables adapt automatically to topology changes.

A . VLANs establish broadcast domains in switched networks. B . VLANs utilize packet filtering to enhance network security. C . VLANs provide a method of conserving IP addresses in large networks. D . VLANs provide a low-latency internet working alternative to routed networks. E . VLANs allow access to network services based on department, not physical location. F . VLANs can greatly simplify adding, moving, or changing hosts on the network.

A .  fewer devices to manage B .  moderate-to-high scalability C .  stateful inspection of decrypted VPN traffic D .  increased bandwidth with additional interfaces E .  decreased complexity as traffic is filtered from the firewall

A . Filtering can occur based on Layer 3 information. B . Broadcasts are eliminated. C . Routers generally cost less than switches. D . Broadcasts are not forwarded across the router. E . Adding a router to the network decreases latency.

A .  BMR lowers the mean time to recover （MTTR）. B .  BMR supports point-in-time recovery of individual data blocks. C .  BMR enables you to use incremental backups for block recovery. D .  BMR enables recovery even when the database is not mounted or open. E .  BMR enables you to use proxy backups to perform block media recovery. F .  BMR enables increased availability of data during recovery because the data file requires a recovery can remain online.

A .  JMS subsystem of WLS shares same JVM as core WLS application server， so application avoids the overhead of message serialization/de-serialization （necessary when using a 3rd party JMS provider with WLS） B .  WLS JMS ai always faster than 3rd party JMS providers C .  Unified operations and management tools across Application Server and JMS Provider will help with mangeability and diagnostics D .  WLS JMS more compliant with JMS spec than 3rd party vendor

A .  Telepresence-capable B .  high-density service virtualization C .  intelligent integration of security D .  wireless services E .  unified communicatio

A . fewer devices to manage B . moderate-to-high scalability C . stateful inspection of decrypted VPN traffic D . increased bandwidth with additional interfaces E . decreased complexity as traffic is filtered from the firewall

A . decreasing the number of collision domains B . filtering frames based on MAC addresses C . allowing simultaneous frame transmissions D . increasing the size of broadcast domains E . increasing the maximum length of UTP cabling between device

A .  improveQos B .  reduced costs for all types of users C .  packet inspection at wire speed D .  reduced complexity

A . high scalability B . the design supports a layered security model C . firewall addressing does not need to change D . IPsec decrypted traffic is inspected by the firewall E . there is a centralized point for logging and content inspectio

A . VLANs establish broadcast domains in switched networks. B . VLANs utilize packet filtering to enhance network security. C . VLANs provide a method of conserving IP addresses in large networks. D . VLANs provide a low-latency internetworking alternative to routed networks. E . VLANs allow access to network services based on department,not physical location. F . VLANs can greatly simplify adding,moving,or changing hosts on the network.

A . Optimized processing of error notification B . Optimized processing of bandwidth requests C . Optimized processing of content delivery D . Optimized processing of content request

A . Filtering can occur based on Layer 3 information. B . Broadcasts are eliminated. C . Routers generally cost less than switches. D . Broadcasts are not forwarded across the router. E . Adding a router to the network decreases latency.

A . Security increases because only the network administrator may change the routing tables. B . Configuration complexity decreases as network size increases. C . Routing updates are automatically sent to neighbors. D . Route summarization iscompued automatically by the router. E . Routing traffic load is reduced when used in stub network links F . An efficient algorithm is used to build routing tables，using automatic updates. G . Routing tables adapt automatically to topology changes.

A.it reduces the cycle time for the forwarding and presentation of documents B.it reduces the costs related to manual document preparation C.it allows a buyer to take title to the goods once they have arrived at port D.an easy-to use online bill of lading generator will save time and provide the documents instantly 此题为多项选择题。