300-135 新题疑问Q20

andsonwu

QUESTION 20
Which two statements about traceroute are true? (Choose two.)
0 N$ y8 Z! P6 _: I8 ^% A  w1 zA. It supports a variety of IP header options, including verbose.
B. The DF bit is set by default.
: C- G. ^% L) Y, Y& D4 V' J! gC. The TTL value can be set to 0.
: a' B/ V% `' E5 uD. The default probe count for each TTL level is 3.
1 v6 m7 V3 n) d$ y+ K$ qE. Extended traceroute operation can use a modified data pattern.
Correct Answer: DE
! X/ e) T5 L1 \" ^) [
另一种答案为 A，D
https://www.cisco.com/c/en/us/su ... ace.html#ext_troute
Loose, Strict, Record, Timestamp, Verbose[none]:       
IP header options. You can specify any combination. The traceroute command issues prompts for the required fields. Note that the traceroute command will place the requested options in each probe; however, there is no guarantee that all routers (or end nodes) will process the options.

andsonwu

E. data pattern 好像ping才有

hor5651

thank you