The network administrator is asked to configure 113 point-to-point links. Which IP addressing

scheme best defines the address range and subnet mask that meet the requirement and waste

the fewest subnet and host addresses?

A. 10.10.0.0/18 subnetted with mask 255.255.255.252

B. 10.10.0.0/25 subnetted with mask 255.255.255.252

C. 10.10.0.0/24 subnetted with mask 255.255.255.252

D. 10.10.0.0/23 subnetted with mask 255.255.255.252

E. 10.10.0.0/16 subnetted with mask 255.255.255.252

solution- A- /18 is subnetted with .252 means /30 i.e-- total on bits will be 30-18=12 so subnets will be 2^12= 4096

B- /25 is subnetted with /30 i.e.-- total on bits 30-25=5. so subnets will be 2^5=32

C- /24 is subnetted with /30 i.e.-- total on bits 30-24=6. so subnets will be 2^6=64

D- /23 is subnetted with /30 i.e-- total on bits 30-23=7. so subnets will be

E- /16 is subnetted with /30 i.e-- total on bits 30-16=14. so subnets will be 2^14=16384

Conclusion from all the options is -- for 113 subnets the best suited subnet is /23 subnetted with /30 in which 128 subnets can be connnected. In this subnet there will be less wastage of sub Networks i.e only 128-113=15.

scheme best defines the address range and subnet mask that meet the requirement and waste

the fewest subnet and host addresses?

A. 10.10.0.0/18 subnetted with mask 255.255.255.252

B. 10.10.0.0/25 subnetted with mask 255.255.255.252

C. 10.10.0.0/24 subnetted with mask 255.255.255.252

D. 10.10.0.0/23 subnetted with mask 255.255.255.252

E. 10.10.0.0/16 subnetted with mask 255.255.255.252

**Ans-D**solution- A- /18 is subnetted with .252 means /30 i.e-- total on bits will be 30-18=12 so subnets will be 2^12= 4096

B- /25 is subnetted with /30 i.e.-- total on bits 30-25=5. so subnets will be 2^5=32

C- /24 is subnetted with /30 i.e.-- total on bits 30-24=6. so subnets will be 2^6=64

D- /23 is subnetted with /30 i.e-- total on bits 30-23=7. so subnets will be

**2^7=128**E- /16 is subnetted with /30 i.e-- total on bits 30-16=14. so subnets will be 2^14=16384

Conclusion from all the options is -- for 113 subnets the best suited subnet is /23 subnetted with /30 in which 128 subnets can be connnected. In this subnet there will be less wastage of sub Networks i.e only 128-113=15.

Thank you for the explanation.

ReplyDeletewelcome

ReplyDeletegreat

ReplyDeletethanks for the soluion

ReplyDeletesolution is nice! I think .252 should be /29. May I know how did you calculate that? Thanks

ReplyDelete