You are evaluating a routing policy for an ISP and you find the ^42+ .* (23|9)$ regular expression.
Which three AS paths match the regular expression? (Choose three.)
A.
42 42 42 42 9
B.
42 42 23 500
C.
42 42 42 60 9
D.
42 60 23 9 42
E.
42 69 500 23
Explanation:
^ starts with 42
$ ends with 23 or 9
+ more numbers
.* – anything
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