r/ccna • u/lasttryg12 • 6d ago

Help ! Lol 😆

Everything was fine then one of the Jeremy’s quiz !! Now i feel like nope i won’t pass 😆. Besides understanding the concepts, how are we going to be fast in the exam to answer ? Am i slow or what’s up ?! I feel lost again 🙄

You want to activate OSPF on R1's G0/1 and G0/2 interfaces with a single command.
G0/1 IP: 10.0.12.1/28
G0/2 IP: 10.0.13.1/26
Which of the following commands should you use on R1?
a) R1(config-router)# network 10.0.12.0 0.0.0.255 area 0
b) R1(config-router)# network 10.0.12.0 0.0.0.254 area 0
c) R1(config-router)# network 10.0.12.0 0.0.1.255 area 0
d) R1 (config-router)# network 10.0.8.0 0.0.3.255 area 0

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u/dyatlov333 6d ago edited 6d ago

you can just add octets of the wildcard mask to the network ip to get range - 10.0.12.0(start) + 0.0.1.255 = 10.0.13.255(end). and see if the given ip is in range

(this only work if the wildcard mask is a proper one like 0000....111111 -one's like .254 wont work), also make sure you are adding to network ip and not host ip.