Exam XK0-005 topic 1 question 102 discussion

This is definitely C, you cant have 2 default gateways.

I would go with internal-only DNS: it is true that the gateway situation is weird (the gateway is outside the network, but reachable with an on-link static), but it is also true that the default gateway IS present in the ARP table (also with a complete flag), so the gateway should be working just fine. Likewise, having multiple default routes does add complexity, but also just works (and the routes have different distances). We cannot say whether the ARP table contains incorrect entries or not. The only remaining one is the DNS, which would explain why some websites work

B. The IP netmask is wrong for ens3. - the IP of the GW is certainly wrong C. Two default routes are configured. - actually having a double default can use problems D. The ARP table contains incorrect entries. , you see two IP and MAC associated with the same network card...

Technically B is the best answer here, but its not best practice to have two default-routes configured. It overcomplicates the network configuration, and also the troubleshooting when an issue arises. A floating static route for a specific destination address is the better solution.

oh shit!!! good call Manish!! i just realized that the real answer is D, looks at `ens3` interface in the arp table!! it's showing twice and it's the main default gateway, you're a genius!! i'm glad a looked at this again!

well the 89 networks definitely have a subnet ID problem, but I'm not sure if that's the reason there is a problem here.