Refer to the exhibit. Drag and drop the prefix lengths from the left onto the matching prefixes on the right. Not all prefix lengths are used. <DragDrop items={["255.255.255.128","255.255.255.224","255.255.255.240","255.255.255.248","255.255.255.252"]} slots={[{"answer":"255.255.255.128","id":"s1","label":"10.10.13.0"},{"answer":"255.255.255.240","id":"s2","label":"10.10.13.144"},{"answer":"255.255.255.248","id":"s3","label":"10.10.13.160"},{"answer":"255.255.255.224","id":"s4","label":"209.165.202.128"}]} explanation={"The routing table identifies the destination networks and their prefix lengths: 10.10.13.0/25, 10.10.13.144/28, and 10.10.13.160/29. Converting CIDR to dotted-decimal masks gives /25 = 255.255.255.128, /28 = 255.255.255.240, and /29 = 255.255.255.248. For 209.165.202.128, the exhibit shows the 209.165.202.0 network is subnetted with /27 prefixes, so 209.165.202.128 is a /27 network, which uses mask 255.255.255.224. A /30 mask would be 255.255.255.252, which is not used for any of the listed destination prefixes.\n\n**Learn more:** [Understand Host and Subnet Quantities - Cisco](https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13790-8.html) · [RFC 1878: Variable Length Subnet Table For IPv4](https://www.rfc-editor.org/info/rfc1878/)"} reuse={false} />