What are three common reasons for ATM CRC errors？（）

A . architectures that is inflexible and inefficient B . desire to use the same vender for desktop and server deployments C . selecting best-performing vendors for each individual component D . existing equipment has reached and of life E . increasing operational costs of managing data centers F . demand among users for access to information anytime, anywhere

A .  programming interface to external applications B .  FXS and FXO port negotiation C .  AutoQos VoIP trust boundaries D .  signaling and device control E .  LLQ for voice and video traffic F .  directory and XML service

A . A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure B . Broadcast storms can be mitigated by decreasing the number of broadcast domains,thus increasing their size. C . A higher level of network security can be reached by separating sensitive data traffic from other network traffic. D . Port-based vlans increase switch-port use efficient,thanks to 802.1Q trunks E . A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure. F . Broadcast storms can be mitigated by increasing the number of broadcast domains,thus reducing their size. G . VLANs make it easier for IT staff to configure new logical groups,because the vlans all belong to the same broadcast domain.

A . 6to4 tunneling B . VPN tunneling C . GRE tunneling D . ISATAP tunneling E . PPP tunneling F . Teredo tunneling

A . Ethernet B . PPP C . Token Ring D . HDLC E . Frame Relay F . POTS

A . GLBP supports up to eight virtual forwarders per GLBP group B . GLBP supports clear text and MD5 password authentication between GLBP group members C . GLBP is an open source standardized protocol that can be used with multiple vendors D . GLBP supports up to 1024 virtual routers E . GLBP can load share traffic across a maximum of four routers F . GLBP elects two AVGs and two standby AVGs for redundancy

A . To pass data to a pop-up menu.  B . To populate a base table block.  C . To pass data to other form modules.  D . To pass data to other Oracle products.  E . To dynamically construct SELECT statements.  F . To server as the source for a FROM clause query.&e

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 . severity level B . facility C . log message name D . time stamp E . error codes F . access privilege

A . Filter Smurf ICMP packets. B . Filter as close to the core as possible C . Filter as close to the edge as possible D . Filter as precisely as possible E . Filter both source and destination where possible

A . a set of rules that can be established and associated with the ingress and egress ports of the control plane B . improves performance of the control plane by marking control plane packets with DSCPEF C . protects the control plane on a router from DoS attacks D . treats the control plane as a separate entity with its own ingress （input） and egress （output） ports E . provides the control plane with a separate token bucket F . enhances security of the control plane by tunneling packets to and from the control plane

A . 6to4 tunneling B . VPN tunneling C . GRE tunneling D . ISATAP tunneling E . PPP tunneling F . Teredo tunneling

A . A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure B . Broadcast storms can be mitigated by decreasing the number of broadcast domains，thus increasing their size C . A higher level of network security can be reached by separating sensitive data traffic from other network traffic D . Port-based vlans increase switch-port use efficient，thanks to 802.1Q trunks E . A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure F . Broadcast storms can be mitigated by increasing the number of broadcast domains，thus reducing theirsize G . VLANs make it easier for IT staff to configure new logical groups，because the vlans all belong to thesame broadcast domai

A . demand among users for access to information anytime, anywhere B . desire to use the same vender for desktop and server deployments C . existing equipment has reached and of life D . increasing operational costs of managing data centers E . architectures that is inflexible and inefficient F . selecting best-performing vendors for each individual component

A .  Ease of disk administration and maintenance B .  Load balancing across physical disks C .  Software RAID-1 data redundancy with double or triple mirrors D .  Automatic recovery of failed disk

A . programming interface to external applications B . FXS and FXO port negotiation C . AutoQos VoIP trust boundaries D . signaling and device control E . LLO for voice and video traffic F . directory and XML service

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 . dispersion B . Optical SNR C . span attenuation D . four wave mixing E . receiver sensitivity