有关Ports正确的是（）

A . reduce air charge turbulence B . induce air swirl C . deflect hot combustion gas away from the valves D . oppose the effects of piston induced squish

A . https B . tftp C . rmi D . http E . ft

A . speed B . DTP negotiation settings C . trunk encapsulation D . duplex

A . call at B . call on C . call in D . call u

A . FTP B . SMTP C . Telnet D . DNS E . All of the above

A . 正确 B . 错误

A . Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security mac-address command. B . Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security mac-address command. C . Use the switchport port-security MAC address sticky command on all the switch ports that have end devices connected to them. D . Use show mac-address-table to determine the addresses that are associated with each port and then enter the commands on each switch for MAC address port-security.

A . its flashing light B . the ship's name C . its identification D . its signal letter

A . prevent stress concentration in the bulwark B . permit easy jettison of deck cargo in an emergency C . provide opening through the bulwarks for mooring lines D . allow water shipped on deck to flow off rapidly

A . Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports. B . Calls to the PSTN can be made via FXS or T1/E1 trunk ports. C . Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports. D . Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.

A . to loading B . be loading C . loading D . to load

A . SMTP B . Telnet C . FTP D . DNS

A .  four station ports and four trunk ports （4xFXS and 4xFXO） B .  two station ports （2xFXS） C .  eight station ports （8xFXS） D .  one station port and one trunk port （1xFXS and 1xFXO）

A . More collision domains will be created. B . IP address utilization will be more efficient. C . More bandwidth will be required than was needed previously. D . An additional broadcast domain will be created.

A . Switch A - Fa0/0 B . Switch A - Fa0/1 C . Switch B - Fa0/0 D . Switch B - Fa0/1 E . Switch C - Fa0/0 F . Switch C - Fa0/1

A . the carrier B . the merchant C . the owner D . the shipper

A . over-speeding of the engine B . failure of the engine to shut down C . no effect of engine mounting bolts D . high exhaust temperature

A . to windward should be opened and the ones to leeward should be closed B . to leeward should be opened and the ones to windward should be closed C . should be opened D . should be closed

A . to B . for C . in D . o

A . 正确 B . 错误

A . UDP port 1812 B . UDP port 2000 C . TCP port 2002 D . UDP port 1645

A .  Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports. B .  Calls to the PSTN can be made via FXS or T1/E1 trunk ports. C .  Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports. D .  Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.

A．男装 B．女装 C．皮具 D．配饰

A．将第3列上拉至高电平 B．将任意列上拉至高电平 C．将任意下拉至低电平 D．将第3列下拉至低电平