钮锁（）A、twist lockB、lashing barC、bridge plateD、bridge fitting

Onboard a Ro-Ro vessel many decks are used for the carriage of both rolling and container cargoes，as such it is most useful if a deck socket accepts both ______．

A.Twist-Locks and lashing hooks

B.Container locks and bridge fittings

C.Bridge fittings and lashing hooks

D.Twist-locks and container locks

______ is not required by bridge-to-bridge communications．

A.VHF

B.SART

C.NAVTEX

D.LES

Which two of the following values does STP take into consideration when it elects the root bridge? (Select two answer choices)

A. The BPDU version number

B. The access layer bridge setting

C. The Bridge ID

D. The spanning-tree update number

E. The bridge priority

F. The VLAN number

What purpose does a bridge fitting serve when lashing containers ________．

A.Ties a container stack to the deck

B.Ties a container to the container below it

C.Restrains racking loads

D.Restrains the container against horizontal motion

All the following except ___ are fittings for securing and lashing containers on board ships.

A.stackers

B.twistlock

C.bridge fittings

D.containment booms

A. All switch and bridge ports are in the forwarding state.

B. All switch and bridge ports are in the stand-by state.

C. All switch and bridge ports are assigned as either root or designated ports.

D. All switch and bridge ports are in either the forwarding or blocking state.

E. All switch and bridge are either blocking or looping.