H12-831_V1.0 Leak Questions

Pingthrough one-wayicmp echo requestPacket inspection and bidirectional reachability of the correct end

TracertMust be able to trace every hop from source to destinationIPaddress

pingThe reachability from the local end to the peer end is verifieD. but it does not mean that the peer end to the local end must be reachable

tracertandpingThe function is the same, just the name is different

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

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

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

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

TRUE

FALSE

day4have1stripIS-ISdefault route

R4have2equivalentIS-ISdefault route

R4have2not equivalentIS-ISdefault route

R4withoutIS-ISrouting entry for