Intertropical convergence zone over south Phillippine passing over Mindanao northern Sulu and Palawan. This paragraph is likely to be under the heading of（）.

A . All switch and bridge ports are in the forwarding state. B . All switch and bridge ports are assigned as either root or designated ports. C . All switch and bridge ports are in either the forwarding or blocking state. D . All switch and bridge ports are either blocking or looping.

A . Only UplinkFast and BackboneFast are specified in 802.1w；PortFast must be manually configured. B . Only PortFast is specified in 802.1w；UplinkFast and BackboneFast must be manually configured. C . None of the proprietary Cisco enhancements are specified in 802.1w. D . PortFast，UplinkFast，and BackboneFast are specified in 802.1w.

A . designated ports. B . duplex operating mode. C . fast mode ports. D . root bridge. E . root ports. F . BDPU priority.

A . The use of a queuing method that will give VoIP traffic strict priority over other traffic B . The use of RTP header compression for the VoIP traffic C . The proper classification and marking of the traffic as close to the source as possible D . The use of 802.1QinQ trunking for VoIP traffic E . The use of WRED

A . DSL with 128k uplink /128k downlink B . cable with 256k uplink /256k downlink C . DSL with 128k uplink /768k downlink D . cable with 256k uplink /1.4M downlink

A . The use of a queuing method that will give VoIP traffic strict priority over other traffic   B . The use of RTP header compression for the VoIP traffic. C . The proper classification and marking of the traffic as close to the source as possible D . The use of 802.1QinQ trunking for VoIP traffic E . The use of WRED for the VoIP traffic

A . MPLS TE FR B . MPLS VPN C . BFD D . RSVP E . VPLS F . SNMP

A . spanning-tree backbonefast B . spanning-tree uplinkfast C . spanning-tree portfast D . spanning-tree cost512

A .  rate limit voice traffic B .  configure spanning-tree for fast link convergence C .  isolate voice traffic on separate VLANs D .  classify and mark traffic close to the source

A .  Cisco 7000 Series WAN edge routers B .  Cisco 800 Series routers C .  Cisco Integrated Services Routers D .  Cisco Small Business Series router

A .  simplify communications B .  eliminate network security threats C .  reduce total cost of ownership D .  reduce headcount E .  enable collaboration F .  increase bandwidth

A . blocking B . learning C . discarding D . forwarding E . listening

A . it is newer B . it has smaller timers C . it has less overhead D . it is not timer-based

A . blocking B . learning C . disabled D . forwarding E . listening

A . to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 link B . to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 link C . to two core switches from redundant distribution switches connected with a Layer 2 link D . to two core switches from redundant distribution switches connected with a Layer 3 link E . to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO

A . Because data does not need to arrive intact, so data transfer rates can be variable B . Because lost voice-data packets must be retransmitted C . Because voice data packets should arrive quickly and sequentially, and with no lost data D . Because voice data packets must follow a single dedicated path through the network

A . end-to-end network delay times that exceed 50 ms for real-time traffic are considered unacceptable B . end-to-end network delay times that exceed 250 ms for real-time traffic are considered unacceptable C . end-to-end network delay is not a factor as long as the  delay is consistent D . some packet loss can be corrected by codec algorithms E . RSVP handles voice packet retransmission F . fragmentation is a result of packet lo

A .  to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 link B .  to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 link C .  to two core switches from redundant distribution switches connected with Layer 2 link D .  to two core switches from redundant distribution switches connected with Layer 3 link E .  to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO

A . GALE WARNING B . 24 HOURS FORECAST C . SYNOPSIS D . STORM WARNING

A . The center of the storm will by-pass you B . The storm will strike you on the starboard side C . You are in the direct path of the storm and should take immediate steps to batten down loose gear D . The storm is starting to break u

A . rate limit voice traffic B . configure spanning-tree for fast link convergence C . isolate voice traffic on separate VLANs D . classify and mark traffic close to the source

A．Long-term cycles affecting the ocean and atmosphere are at play. B．Strong El Nino episodes whose long-range reach generate wind patterns over the Atlantic that suppress the formation of hurricanes. C．A weak El Nino in the eastern tropical Pacific. D．Unusually warm sea-surface temperatures in the eastern Atlantic.

A．趋同的 B．令人羡慕的，令人嫉妒的 C．重大的，重要的 D．改变…的方向，改变…的线路 E．拒绝，否认，拒不接受 F．坦率，坦诚，真诚 此题为多项选择题。