A.FALSE

B.TRUE

A.5

B.300

C.500

D.400

A.in the labelSfield:lbit,Used to identify whether the label is the bottom label of the stack, the value is1is indicated as the penultimate layer label

B.For Ethernet,PPPpacket, the tag stack is like 'shim*-between the L2 header and the data: yesVLAN tagTime,MPLShead on the ether head withVLAN tagbetween

C.MPLSThe total length of a single label is4bytes(32bits)

D.in the labelTTLfields andIPgroupedTTL( Time To Live.,time-to-live) is similar in meaning and also has the effect of preventing loops

A.On-site defense

B.Transition training

C.Data transfer

D.Acceptance summary