Question 320
An office has an active remote-network route 198.51.100.0/24 through its primary ISP. One management server at 198.51.100.52 must instead use an alternate next hop 192.0.2.62, without redirecting other servers. Which IPv4 static mask provides the exception?
Explanation
Correct Answer
A /32 matches exactly one destination IPv4 address, so the exception can override the existing /24 only for the intended management server. The router still uses the /24 for adjacent servers with other host values. Choosing a broad mask or the wrong destination IP would redirect unrelated traffic.
Incorrect Answers
That broad entry would overlap the existing route for all 256 addresses and does not isolate the one named server. The requirement is host-specific.
A host value is not an aligned /24 network ID, and a /24-sized exception would affect more addresses than intended. Use a /32.
DNS aliases change application name resolution but not the router’s installed IP route for an exact destination address. A host route is needed.