seq 5 deny 10.1.2.0/24 ge 25 le 27
seq 15 deny 10.2.0.0/16 ge 30 le 30
seq 20 permit 0.0.0.0/0
A.
Prefix 10.1.2.0/24 will be filtered due to clause 5.
B.
Prefix 10.1.2.224/26 will be filtered due to clause 5.
C.
Prefix 10.2.2.4/30 will be filtered due to clause 15.
D.
Prefix 10.0.0.0/8 will be permitteD.
E.
Prefix 0.0.0.0/0 will be permitteD.
Explanation:
Sequence number 5 matches prefixes from 10.1.2.0–10.1.2.255, with prefix
lengths between 25–27, and denies (filters) those prefixes. This results in answer A
being incorrect, because the prefix length (/24) is not in the correct rangE. Clause 15
matches prefixes from 10.2.0.0–10.2.255.255, with prefix length exactly 30, matching
answer C. Clause 20 matches only prefix 0.0.0.0 with length /0, so only a default route
would match this entry. As a result, 10.0.0.0/8 does not match any of the three clauses.