Why is STP required when VLANs span access layer switches？（）

A .  A current RMAN backup-set backup is required. B .  No backup is required. C .  An RMAN image backup is required. D .  A manual backup is required. E .  A "duplicate" preparatory backup is required.

A . engaged in the coastwise trade B . going foreign C . calling at ports in another country signatory to MARPOL 73/78 D . carrying cargoes listed in the MARPOL regulatio

A . engine rough log B . Oil Record Book C . Official Logbook D . deck rough log

A . for a SAN768B Director B . for a second TS3500 Tape Library C . for a second EXP5060 Expansion Unit D . for an additional DS8300 Expansion Frame

A .  multiple Frame Relay PVCs B .  dual Wan links to the regional office C .  dual Wan links to another branch office D .  single links - one to the regional office and one to another branch office

A . any requirement appointed by the Officer B . the most suitable requirement C . the most stringent requirement D . no requirement

A . A power-driven vessel B . A vessel engaged on pilotage duty C . A vessel dredging D . A vessel restricted in her ability to maneuver

A . AH B . MD5 C . PSK D . ESP

A .  a minimum of one Cisco 4100 Series WLAN Controller B .  one WDS per subnet C .  a minimum of one Wireless LAN Services Module D .  all clients using Cisco Aironet Wireless LAN Adapter

A . multiple Frame Relay PVCs B . dualWan links to the regional office C . dualWan links to another branch office D . single links - one to the regional office and one to another branch office

A . Any time the vessel moves from water of one density into waters of a different density B . Prior to getting underway when the vessel is floating in fresh or brackish water C . Only when the vessel moves from fresh water into salt water D . The density of the water is not required to be logged in the unofficial logbook

A . 8192 B . 16384 C . 49152 D . 65535

A . Stop engine B . Nothing to port C . Finish engines D . Finished with engine

A . LPG is compatible with all cargos B . LPG's high oxygen content makes it nonvolatile C . Cargo tanks are inspected less frequently than on oil tankers D . The cargo tanks are used for one type of cargo only

A . Configure TCP header compression on interface B . Configure MPL on the Frame Relay interfaces C . Configure FRF 12 fragmentation on the Frame Relay interfaces D . Fragmentation is not supported with service internetworking

A . to make CEF tables smaller B . to enable label switching on the frame mode interface C . to restrict MPLS availability to predefined time periods D . to restrict label switching to a limited number of networks E . to restrict end users from seeing the routers in the MPLS network

A . ensure a loop-free topology B . protect against user-side loops C . support business applications D . risk of lost connectivity without STP

A . Transparent tunneling must be enabled. B . A valid root certificate must be installed. C . A group pre-shared secret must be properly configured. D . The option to "Allow Local LAN Access" must be selected.

A．Because it's cold. B．Because they don't waste energy. C．Because they eat less.

A.Because its always the best time to buy flowers for your love. B.Because its always the best time to buy chocolate for your love. C.Because its only natural that you buy chocolate and flowers as expressions of love. D.Because its only suitable for all the people to buy something.